Clone Digger: the tool for finding software clones; Google Summer of Code 2008 participant
Hello I'm happy to announce the first release of Clone Digger tool (1.0-beta). Some background on software clones == Two continuous fragments of code form clone if they are similar enough. The presence of clones can greatly increase the software maintenance cost. For instance, every error in the original have to be fixed in all copies. What is it == Clone Digger is the tool for finding software clones (duplicate code) in programs. Currently Python language is supported, Java support will be added later. The following definition of clone is used: two sequences of statements form clone if one of it can be obtained from the other by replacing some subtrees of its abstract syntax tree by other subtrees. Found clone candidates are reported to the HTML with a highlighting of differences. This report can be used to form recommendations for refactoring. License == Clone Digger is provided under the GPL license. Links == Project site: http://clonedigger.sourceforge.net Download: http://clonedigger.sourceforge.net/download.html Clone Digger was tested on Python 2.4 and 2.5. To my knowledge Clone Digger is the first tool that finds software clones in Python sources (excluding tools working on the pure text level). I hope that Clone Digger will be very useful for the Python community. p.s. Clone Digger participates in the Google Summer of Code 2008 program. I am looking for a student willing to work on code analysis and refactoring. The project ideas are listed here: http://clonedigger.sourceforge.net/google_summer_of_code.html PA HREF=http://clonedigger.sourceforge.net;Clone Digger 1.0-beta/A - the tool for finding software clones in Python programs. (23-March-2008) /P -- Best regards, Peter Bulychev. -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Update release 0.1.1 of Evoque Templating
Version 0.1.1 of Evoque is now available. This is mostly a bug-fix release. See complete change log from: http://evoque.gizmojo.org/download/ Other than fixes, it may be worthwhile to mention the addition of a recipe for using Evoque Templating with Django, see: http://evoque.gizmojo.org/ext/django/ What is Evoque Templating? In addition to legitimately contending to being the fastest pure-python text templating engine (see benchmark) Evoque is a full-featured and framework-independent templating system for python with some important features not offered by other systems, such as automatic input quoting and guaranteed XSS protection, restricted template execution mode to be able to expose your templates to untrusted editors, processing is always and only done in unicode, etc (see features). Evoque weighs in under 1K source lines of code, and is licensed under the Academic Free License version 3.0. [benchmark] http://evoque.gizmojo.org/benchmark/ [features] http://evoque.gizmojo.org/features/ [home] http://evoque.gizmojo.org/ Best regards, mario -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Multiline CSV export to Excel produces unrecognized characters?
Hi -- Is there a standard way to use the csv module to export data that contains multi-line values to Excel? I can get it mostly working, but Excel seems to have difficulty displaying the generated multi-line cells. The following reproduces the problem in python 2.5: import csv row = [1,hello,this is\na multiline\ntext field] writer = csv.writer(open(test.tsv, w), dialect=excel-tab, quotechar='') writer.writerow(row) When opening the resulting test.tsv file, I do indeed see a cell with a multi-line value, but there is a small boxed question mark at the end of each of the lines, as if Excel didn't recognize the linebreak. Any idea why these are there or how to get rid of them? Ramon -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiline CSV export to Excel produces unrecognized characters?
On Sun, 23 Mar 2008 23:30:11 -0700, felciano wrote: The following reproduces the problem in python 2.5: import csv row = [1,hello,this is\na multiline\ntext field] writer = csv.writer(open(test.tsv, w), dialect=excel-tab, quotechar='') writer.writerow(row) When opening the resulting test.tsv file, I do indeed see a cell with a multi-line value, but there is a small boxed question mark at the end of each of the lines, as if Excel didn't recognize the linebreak. Any idea why these are there or how to get rid of them? Any chance you are doing this on Windows and Excel doesn't like the return+linefeed line endings that Windows produces when writing files in text mode? Try 'wb' as mode for the output file. Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: encoding/decoding issue with python2.5 and pymssql
These are not cutpaste but typed by hand, yet they are identical to the actual output. seems like the first 8 bytes are swapped while the other half is straightforward. I deeply thank you for your assistance. I am currently using a combination of reversed and list comprehension to rebuild this byte array. On Mar 24, 8:48 am, Dennis Lee Bieber [EMAIL PROTECTED] wrote: On Sun, 23 Mar 2008 22:33:58 -0700 (PDT), Tzury Bar Yochay [EMAIL PROTECTED] declaimed the following in comp.lang.python: for example: the value 'EE604EE3-4AB0-4EE7-AF4D-018124393CD7' is represent as '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9\xd7' Are those direct cutpaste? .join([%2.2X % ord(x) for x in '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9\xd7']) 'E34E60EEB04AE74EAF4D018124393CD7' or, putting in - 'E34E60EE-B04A-E74E-AF4D-018124393CD7' The last half is a direct match... the front half looks to have some byte-swapping E34E60EE = (swap shorts) 60EEE34E 60EEE34E = (swap bytes) EE604EE3 B04A = 4AB0 E74E = 4EE7 Anything onhttp://www.sqljunkies.com/Article/4067A1B1-C31C-4EAF-86C3-80513451FC0... of any help (besides the facet of using a GUID to ID the page describing GUIDs G) -- Wulfraed Dennis Lee Bieber KD6MOG [EMAIL PROTECTED] [EMAIL PROTECTED] HTTP://wlfraed.home.netcom.com/ (Bestiaria Support Staff: [EMAIL PROTECTED]) HTTP://www.bestiaria.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Does python hate cathy?
QS [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] From the title, I assumed this was spam like others with similar titles -- and that the perl newsgroup, for instance, would have 'Does perl hate cathy? | I am new to python, and I encountered a weird problem. Observation: as you will learn, the form of the error message was different from the standard tracebacks one gets during program execution. This was a clue that it was a cleanup message and actually did make sense. Summary lessons. 1. What a Python interpreter does after it executes the last statement is undefined by the language spec. It could do absolutely nothing (and I wish some programs that wastefully spend minutes 'cleaning up' did just that!). CPython tries to do some cleanup when requested but the results are sometimes seemingly arbitrary. 2. If you use __del__, do so for a reason (and keeping a population count is one, though rare*), and explicitly delete the objects for which you want dependable behavior. *A population count is a good example of a class attribute. But it seems to be rare in practice because if one wants that, it seems that a population collection (with a len() method) is usually also wanted -- perhaps so one can iterate thru the population. 3. Experimenting with Python is a good way to learn. Keep it up! tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as afirst programming language?)
Steven D'Aprano [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
| Unfortunately there's nothing we can do to fix that error. Even though
| the function object has an attribute __name__ (also known as
| func_name) which is set to spam, it isn't used for tracebacks. Instead,
| the label comes from a read-only attribute buried deep in the function
| object:
|
| tasty_stuff.func_code.co_name = 'yummy meat-like product in a can'
| Traceback (most recent call last):
| File stdin, line 1, in module
| TypeError: readonly attribute
The fact that .func_name (which is writeable) is not used at first
surprised me until I remembered that code objects can potentially be used
by multiple function objects and hence are not connected to any one in
particular.
| This is a mistake, in my opinion. It's an arbitrary decision to make this
| read-only (as far as I can tell), which goes against the grain of
| Python's we're all consenting adults here philosophy.
|
| By the way, in case you're thinking that wanting to change the (so-
| called) name of a function is a silly think to do, not at all. Consider
| factory functions:
|
| def factory(how_much):
|def f(n=1):
|for i in range(n):
|print I love spam a %s % how_much
|return f
|
| Every function created by the factory has the same name, no matter what
| name you actually use to refer to it. factory('little') and
| factory('lot') both uselessly identify themselves as f in tracebacks.
workaround:
ftext = 'def %s(): pass'
exec ftext%'ftest'
ftest
function ftest at 0x00C01070
so:
def factory(how_much):
'param how_much MUST be a legal name'
exec '''def %(how_much)s(n=1):
for i in range(n):
print I love spam a %(how_much)s''' % {'how_much': how_much}
return locals()[how_much]
f2=factory('much')
print f2.func_name
prints 'much'
But certainly setting .co_name directly would be easier
Terry Jan Reedy
--
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problem with harvestman on ubuntu7.10 gusty
Hi there I just saw that program on the awards and wanted to use it as i installed it on ubuntu gusty gibbon it worked fine without errors and when i run it i get the following errors File /usr/bin/harvestman, line 364, in module spider.run_projects() File /usr/bin/harvestman, line 283, in run_projects self.register_common_objects() File /usr/bin/harvestman, line 135, in register_common_objects conn = connector.HarvestManNetworkConnector() File /usr/share/pycentral/harvestman/site-packages/HarvestMan/ connector.py, line 201, in _init_ self.__configure() File /usr/share/pycentral/harvestman/site-packages/HarvestMan/ connector.py, line 326, in __configure self.__configure_protocols() File /usr/share/pycentral/harvestman/site-packages/HarvestMan/ connector.py, line 449, in __configure_protocols cookiehandler) File /usr/lib/python2.5/urllib2.py, line 467, in build_opener opener.add_handler(h) File /usr/lib/python2.5/urllib2.py, line 303, in add_handler type(handler)) TypeError: expected BaseHandler instance, got type 'NoneType' regards puneet brar 9815665000 -- http://mail.python.org/mailman/listinfo/python-list
Re: On copying arrays
[EMAIL PROTECTED] wrote: Is there a conceptual difference between best =test[:] and best = [x for x in test] ? test is a list of real numbers. Had to use the second form to avoid a nasty bug in a program I am writing. I have to add too that I was using psyco in Python 2.5.1. The first one will only copy sliceable sequences and will give you a result of the same type as test (e.g. if test is a tuple so is best). The second one will copy any sequence, always results in a list and as a side effect assigns a value to 'x'. The method usually recommended is: best = list(test) as it has no side effects, copies any sequence and may be faster than the list comprehension. As with the second of your examples it always gives you a list. -- http://mail.python.org/mailman/listinfo/python-list
problems with harvestman on ubuntu 7.10 gusty gibbon
Hi there I just saw that program on the awards and wanted to use it as i installed it on ubuntu gusty gibbon it worked fine without errors and when i run it i get the following errors File /usr/bin/harvestman, line 364, in module spider.run_projects() File /usr/bin/harvestman, line 283, in run_projects self.register_common_objects() File /usr/bin/harvestman, line 135, in register_common_objects conn = connector.HarvestManNetworkConnector() File /usr/share/pycentral/harvestman/site-packages/HarvestMan/connector.py, line 201, in _init_ self.__configure() File /usr/share/pycentral/harvestman/site-packages/HarvestMan/connector.py, line 326, in __configure self.__configure_protocols() File /usr/share/pycentral/harvestman/site-packages/HarvestMan/connector.py, line 449, in __configure_protocols cookiehandler) File /usr/lib/python2.5/urllib2.py, line 467, in build_opener opener.add_handler(h) File /usr/lib/python2.5/urllib2.py, line 303, in add_handler type(handler)) TypeError: expected BaseHandler instance, got type 'NoneType' regards puneet brar -- http://mail.python.org/mailman/listinfo/python-list
Re: always getting 'None' return value from PyObject_CallObject
problem fixed ... my bad. I was using a dispatch mechanism where the C code always called the same python dispatch function, with the actual function name to invoke as arguments. Anyway, I forgot the 'return' statement. The code is below. Many thanks and apologies for the help provided :) def dispatch(*args): #print Dispatch: args are #print args[1:] global_dict = globals() return global_dict[args[0]](args[1:]) -- http://mail.python.org/mailman/listinfo/python-list
Shortcutting the function call stack
Hello all, I would like to do something like: def called(arg) if arg==True: !!magic!!caller.return 1 def caller(arg) called(arg) return 2 Here, the fake !!!magic!!! represents a statement (which I ignore) that would make the caller function return a value different from what it'd return normally. For example, caller(True) would return 1, and caller(False) would return 2. The reason I want that is because I don't want the caller function to know what's going on in the called function, and be shortcut if the called function think it's necessary. Would you know if that's possible, and if so, how? I've done a bit of research and I think I've found some good pointers, in particular using the 'inspect' library: import inspect def called(arg) if arg==True: caller_frame = inspect.stack()[1] ... Here 'caller_frame' contains the frame of the caller function. Now, how can I make that frame return a particular value? By the way, I'm not really interested in 'called' throwing an exception and 'caller' catching it. In fact, I want things to remain completely transparent for 'caller'. Hope that was clear... :/ Thanks! Julien -- http://mail.python.org/mailman/listinfo/python-list
Installing Mutagen Package On Windows
Hey, I've run into another problem. I am trying to install the Mutagen package to use as my first useful program, but can't figure out how to install it on windows. The README says it is a simple application of-- Installing -- $ ./setup.py build $ su -c ./setup.py install --but I ran c:\python c:\python25\tools\scripts\setup.py build and did similarly for setup.py. I also added c:\python25 and c:\python25\tools\scripts to my path, but this hasn't worked. I have heard of 'easy_install' but don't know how to run easy_install. So, I ask for a reference because Google did not give me a quick answer and the python.org explanation at PEP 250 doesn't really explain what I should do. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyparsing help
Il Sat, 22 Mar 2008 14:11:16 -0700, rh0dium ha scritto:
Hi all,
I am struggling with parsing the following data:
test1 =
Technology {
name= gtc dielectric
= 2.75e-05 unitTimeName
= ns timePrecision = 1000
unitLengthName = micron
lengthPrecision = 1000 gridResolution
= 5
unitVoltageName = v voltagePrecision
= 100 unitCurrentName =
ma currentPrecision= 1000
unitPowerName = pw powerPrecision
= 1000 unitResistanceName =
kohm resistancePrecision = 1000
unitCapacitanceName = pf
capacitancePrecision= 1000
unitInductanceName = nh
inductancePrecision = 100
}
Tileunit {
width = 0.22 height
= 1.69
}
Did you think of using something a bit more sofisticated than pyparsing?
I have had a good experience to using ply, a pure-python implementation
of yacc/lex tools, which I used to extract significant data from C
programs to automatize documentation.
I never used before yacc or similar tools, but having a bit of experience
with BNF notation, I found ply easy enough. In my case, the major problem
was to cope with yacc limitation in describing C syntax (which I solved
by oelaxing the rules a bit, since I was going to process only already-
compiled C code). In your much simpler case, I'd say that a few
production rules should be enough.
P.S : there are others, faster and maybe more complete python parser, but
as I said ply is pure python: no external libraries and runs everywhere.
Ciao
---
FB
--
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hi friends........... google group invites you a won dering world of businesss ............. do u want to earn mil lions of dollers per month through online jobs joined with me and find the way to ea
hi friends... google group invites you a wondering world of businesss . do u want to earn millions of dollers per month through online jobs joined with me and find the way to earn dollers. visit us www.jobsforyouguys.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Disable resize button
Hi! I need to disable resize button in Tkinter. I inherit the Frame class. Then in the constructor i make my buttons, labels, etc. Then I pack them and when move borders of the frame everything changes it's location and it looks really bad. How can I change that? That's my code: # -*- coding: cp1251 -*- import Tkinter class App(Tkinter.Frame): def click(self): pass def click2(self): pass def __init__(self, master=None): Tkinter.Frame.__init__(self, master, width = 700, height = 400,\ bg = #99) self.pack() # Buttons self.b1 = Tkinter.Button(self, text = uДобави Книга,\ command=self.click, font = Courier, \ fg = red) self.b2 = Tkinter.Button(self, text = uДобави читател,\ command=self.click2, font = Courier, \ fg = red) self.b1.place(relx = 0.75, rely = 0.3) self.b2.place(relx = 0.75, rely = 0.4) # Labels self.l1 = Tkinter.Label(self, font = Courier, height = 4,\ text = uИнформация, fg = #ff,\ bg = #99) self.l1.place(x = 275, y = 10) # Text Control #self.txt = Tkinter.Text(self, bg = #124456, ) #self.txt.pack() def main(): app = App() app.mainloop() if __name__ == __main__: main() -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyparsing help
On Mar 23, 4:04 pm, rh0dium [EMAIL PROTECTED] wrote:
I needed to tweak it a bit to ignore the comments.. Namely this fixed
it up..
mainDict = dictOf(
Group(Word(alphas)+Optional(quotedString)),
Suppress({) + attrDict + Suppress(})
) | cStyleComment.suppress()
Thanks again. Now I just need to figure out how to use your dicts to
do some work..- Hide quoted text -
- Show quoted text -
I'm glad this is coming around to some reasonable degree of completion
for you. One last thought - your handling of comments is a bit crude,
and will not handle comments that crop up in the middle of dict
entries, as in:
color= /* using non-standard color during testing */
plum
The more comprehensive way to handle comments is to call ignore.
Using ignore will propagate the comment handling to all embedded
expressions, so you only need to call ignore once on the top-most
pyparsing expression, as in:
mainDict.ignore(cStyleComment)
Also, ignore does token suppression automatically.
-- Paul
--
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Re: Installing Mutagen Package On Windows
Benjamin Serrato schrieb: Hey, I've run into another problem. I am trying to install the Mutagen package to use as my first useful program, but can't figure out how to install it on windows. The README says it is a simple application of-- Installing -- $ ./setup.py build $ su -c ./setup.py install --but I ran c:\python c:\python25\tools\scripts\setup.py build and did similarly for setup.py. I also added c:\python25 and c:\python25\tools\scripts to my path, but this hasn't worked. I have heard of 'easy_install' but don't know how to run easy_install. So, I ask for a reference because Google did not give me a quick answer and the python.org explanation at PEP 250 doesn't really explain what I should do. You need to call python2.5 setup.py install and google for setuptools, python, easy_install to find out all about it you need. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as afirst programming language?)
On Mon, 24 Mar 2008 04:33:53 -0400, Terry Reedy wrote: The fact that .func_name (which is writeable) is not used at first surprised me until I remembered that code objects can potentially be used by multiple function objects and hence are not connected to any one in particular. How does that happen? And if it is the case, what's the justification for giving them a co_name attribute? Surely the name of the function should be that of the function object, not of one of the shared parts? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing json output
On Mar 18, 9:10 pm, Gowri [EMAIL PROTECTED] wrote:
Hi,
I have a service running somewhere which gives me JSON data. What I do
is this:
import urllib,urllib2
import cjson
url = 'http://cmsdoc.cern.ch/cms/test/aprom/phedex/dev/gowri/datasvc/
tbedi/requestDetails'
params = {'format':'json'}
eparams = urllib.urlencode(params)
request = urllib2.Request(url,eparams)
response = urllib2.urlopen(request) # This request is sent in HTTP
POST
print response.read()
This prints a whole bunch of nonsense as expected. I use cjson and am
unable to figure out how to print this json response and I guess if I
can do this, parsing should be straightforward?
snip
Gowri -
On a lark, I tried using the JSON parser that ships with the examples
in pyparsing (also available online at
http://pyparsing.wikispaces.com/space/showimage/jsonParser.py).
The parsed data returned by pyparsing gives you a results object that
supports an attribute-style access to the individual fields of the
JSON object. (Note: this parser only reads, it does not write out
JSON.)
Here is the code to use the pyparsing JSON parser (after downloading
pyparsing and the jsonParser.py example), tacked on to your previously-
posted code to retrieve the JSON data in variable 's':
from jsonParser import jsonObject
data = jsonObject.parseString(s)
# dump out listing of object and attributes
print data.dump()
print
# printe out specific attributes
print data.phedex.call_time
print data.phedex.instance
print data.phedex.request_call
# access an array of request objects
print len(data.phedex.request)
for req in data.phedex.request:
#~ print req.dump()
print -, req.id, req.last_update
This prints out (long lines clipped with '...'):
[['phedex', [['request', [[['last_update', '1188037561'], ...
- phedex: [['request', [[['last_update', '1188037561'],
['numofapproved', '1'],...
- call_time: 0.10059
- instance: tbedi
- request: [[['last_update', '1188037561'], ['numofapproved',
'1'], ...
- request_call: requestDetails
- request_date: 2008-03-24 12:56:32 UTC
- request_timestamp: 1206363392.09
- request_url:
http://cmsdoc.cern.ch/cms/test/aprom/phedex/dev/gowri/datasvc/tbedi/requestDetails?format=json
0.10059
tbedi
requestDetails
1884
- 7425 1188037561
- 8041 1188751826
- 9281 1190116795
- 9521 1190248781
- 12821 1192615612
- 13121 1192729887
...
The dump() method is a quick way to see what keys are defined in the
output object, and from the code you can see how to nest the
attributes following the nesting in the dump() output.
Pyparsing is pure Python, so it is quite portable, and works with
Python 2.3.1 and up (I ran this example with 2.5.1).
You can find out more at http://pyparsing.wikispaces.com.
-- Paul
--
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python library to manipulate PALM documents ?
Hi all, anybody knows a python equivalent of the perl PALM::Doc module (and eventually other PALM::). I have a e-book device wich reads mobi-pocket format (among others). I have downloaded from a forum a set of perl scripts to convert HTML to unencripted mobipocket format and vice-versa. It uses the PALM:: package. I would attempt (for my convenience and for the fun of it) to make a python equivalent of that. Hence my quest for a Palm::Doc equivalent. My googling up to now resulted in nothing relevant. Keeping searching ... Ciao - FB -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as afirst programming language?)
On Mar 24, 1:26 pm, Steven D'Aprano [EMAIL PROTECTED] cybersource.com.au wrote: On Mon, 24 Mar 2008 04:33:53 -0400, Terry Reedy wrote: The fact that .func_name (which is writeable) is not used at first surprised me until I remembered that code objects can potentially be used by multiple function objects and hence are not connected to any one in particular. How does that happen? Like this: def foomaker(x): ... def foo(y): return x+y ... return foo ... foo1 = foomaker(1) foo2 = foomaker(2) foo1.func_code code object foo at 0x73530, file stdin, line 2 foo2.func_code code object foo at 0x73530, file stdin, line 2 Of course foo1 and foo2 are not the same thing: foo1(8) 9 foo2(8) 10 And if it is the case, what's the justification for giving them a co_name attribute? Surely the name of the function should be that of the function object, not of one of the shared parts? foo1.__name__ 'foo' foo1.func_code.co_name 'foo' As seen above, func.__name__ and func.func_code.co_name are the same thing (until tampered with). -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Serving another web site which requires authentication
Hi, I need your suggestions about the topic. Actually, I'm not sure where to start but basically, I want to make something like; (I have an account on a site which requires log-in) - I'll be logged-in to that site with my account in my server. - And when a user connects to my site, I'll forward him/her to that site, using my account even if he/she doesn't have an account on that site... probably, I need to develop a proxy to do this, but I'm not sure... (I use python + django) I really appriciate your ideas. -- http://mail.python.org/mailman/listinfo/python-list
Re: Shortcutting the function call stack
On Mon, 24 Mar 2008 04:21:29 -0700, Julien wrote: Hello all, I would like to do something like: def called(arg) if arg==True: !!magic!!caller.return 1 Instead of writing if arg==True, or if (arg==True)==True, or even if ((arg==True)==True)==True, you should just write: if arg: That's probably all you need. def caller(arg) called(arg) return 2 def called(arg): return 1 def caller(arg): if arg: return called(arg) return 2 And if you wish to change the place where the decision is made: def called(arg): if arg: return 1 else: return 2 def caller(arg): return called(arg) Here, the fake !!!magic!!! represents a statement (which I ignore) that would make the caller function return a value different from what it'd return normally. The statement you use to return a value different from what you would normally return is the return statement. You need to call that statement from the function doing the returning, not from another function. The reason I want that is because I don't want the caller function to know what's going on in the called function, and be shortcut if the called function think it's necessary. Not knowing what's going on in called functions is why functions were invented in the first place. That's what they do. What shortcut do you think you might want to take? There are probably better solutions than playing around with the internals of the interpreter. I have a feeling you are trying to implement some sort of function cache, maybe... def check_in_cache(arg): # fake cache code if arg: !!magic!!caller.return 1 # not real Python def function(arg): check_in_cache(arg) # magic happens here # but if it doesn't, we do lots of calculations here return 2 # and finally return Is that the sort of thing you're trying for? If so, that's not the way to go about it. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
urllib leaves connections/sockets waiting. BIG problem!!!
hi i am using urllib2 to do some automated web thing. basically i hit on sites and check the price what they are offering for their product and then decide if i want to lower or increase my pricing.so in short i have to hit hundreds of sites! for the problem: = i run 20 threads all do the same stuff. (hit and run :) ) after around 10-15 hits(per thread) hits the thread does nothing. it freezes. slowely but STEADILY all the threads end up with the same fate :( i did some netstat and found out that the connecton(sockets) the program had opened are waiting the CLOSE_WAIT state !! netstat -t tcp1 0 192.168.1.2:4882host-blabla:www CLOSE_WAIT tcp1 0 192.168.1.2:4884host-blabla:www CLOSE_WAIT tcp1 0 192.168.1.2:4375host-blabla:www CLOSE_WAIT OUTPUT OF PROGRAM: THREAD: #Thread-2 getting price from webi-d 7511975 DONE !!! THREAD: #Thread-1 getting price from webi-d 4449152 DONE !!! THREAD: #Thread-2 getting price from webi-d 7466091 DONE !!! THREAD: #Thread-1 getting price from webi-d 8641914 DONE !!! THREAD: #Thread-2 getting price from webi-d 7745289 DONE !!! THREAD: #Thread-1 getting price from webi-d 6032442 DONE !!! THREAD: #Thread-2 getting price from webi-d 8149873 DONE !!! no-price-on-page error THREAD: #Thread-1 getting price from webi-d 5842934 DONE !!! no-price-on-page error THREAD: #Thread-2 getting price from webi-d 3385778 DONE !!! THREAD: #Thread-1 getting price from webi-d 4610122 DONE !!! THREAD: #Thread-2 getting price from webi-d 8641536 DONE !!! THREAD: #Thread-1 getting price from webi-d 4219935 DONE !!! -and thats it, it freezes. i have waited 1hr the sockets have not changed their states! :( please help :) -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as afirst programming language?)
On Mon, 24 Mar 2008 06:48:10 -0700, Arnaud Delobelle wrote: On Mar 24, 1:26 pm, Steven D'Aprano [EMAIL PROTECTED] cybersource.com.au wrote: On Mon, 24 Mar 2008 04:33:53 -0400, Terry Reedy wrote: The fact that .func_name (which is writeable) is not used at first surprised me until I remembered that code objects can potentially be used by multiple function objects and hence are not connected to any one in particular. How does that happen? Like this: def foomaker(x): ... def foo(y): return x+y ... return foo ... foo1 = foomaker(1) foo2 = foomaker(2) foo1.func_code code object foo at 0x73530, file stdin, line 2 foo2.func_code code object foo at 0x73530, file stdin, line 2 Ah, that makes sense. And obvious in hindsight. Of course foo1 and foo2 are not the same thing: Naturally not. They are different functions. The fact that they share a small part (func_code) is irrelevant. There's more to a function than the code object. And if it is the case, what's the justification for giving them a co_name attribute? Surely the name of the function should be that of the function object, not of one of the shared parts? foo1.__name__ 'foo' foo1.func_code.co_name 'foo' As seen above, func.__name__ and func.func_code.co_name are the same thing (until tampered with). Yes, but what I'm asking is why the code objects have a co_name attribute. And even if there's a good reason for code objects to have a name, why do tracebacks use func.func_code.co_name instead of func.__name__? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Serving another web site which requires authentication
ur in luck i am an expert at this! tell me the details , site name etc you would have to proxy everything, basically the urls in the copied page have to be changed to point to ur site. its highly possible. a minor adjustment to ur urlconf and it will work. -- http://mail.python.org/mailman/listinfo/python-list
URL encoding
Is there any method in the standard modules that can perform proper url encoding according to RFC? -- http://mail.python.org/mailman/listinfo/python-list
Re: URL encoding
On Mar 24, 7:04 pm, [EMAIL PROTECTED] wrote: Is there any method in the standard modules that can perform proper url encoding according to RFC? whats wrong with the current encoding ??? it just works fine!!! or is it that u dont know about urllib.urlencode() ?? -- http://mail.python.org/mailman/listinfo/python-list
Re: On copying arrays
On Mon, 24 Mar 2008 09:52:21 +, Duncan Booth wrote: The method usually recommended is: best = list(test) as it has no side effects In general, you can't assume *anything* in Python has no side effects, unless you know what sort of object is being operated on. Here's an example that changes the value of test: test = iter((1, 2, 3, 4, 5, 6)) best = list(test) best [1, 2, 3, 4, 5, 6] another = list(test) another [] And here's an example that has a rather obvious side-effect: class Foo(object): ... def __getitem__(self, n): ... if n == 3: print I'm in ur puter, deletin ur files ... if 0 = n 6: return n+1 ... raise IndexError ... test = Foo() best = list(test) I'm in ur puter, deletin ur files best [1, 2, 3, 4, 5, 6] -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiline CSV export to Excel produces unrecognized characters?
Any chance you are doing this on Windows and Excel doesn't like the return+linefeed line endings that Windows produces when writing files in text mode? Try 'wb' as mode for the output file. Ciao, Marc 'BlackJack' Rintsch Fixed! Can't believe I missed that... Thank you for the quick reply! Ramon -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as afirst programming language?)
On Mar 24, 2:01 pm, Steven D'Aprano [EMAIL PROTECTED] cybersource.com.au wrote: [...] Yes, but what I'm asking is why the code objects have a co_name attribute. And even if there's a good reason for code objects to have a name, why do tracebacks use func.func_code.co_name instead of func.__name__? From what I remember when I looked at the source: stack frames execute code objects, not functions. They don't know what function has spawned them, only what code object they are executing. In fact when one thinks of it, it makes more sense for code objects to have a name (taken from the def statement) than for function objects, as there is exactly one code object for every def statement. -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Re: Shortcutting the function call stack
On Mar 24, 5:21 am, Julien [EMAIL PROTECTED] wrote: Hello all, I would like to do something like: def called(arg) if arg==True: !!magic!!caller.return 1 def caller(arg) called(arg) return 2 Here, the fake !!!magic!!! represents a statement (which I ignore) that would make the caller function return a value different from what it'd return normally. For example, caller(True) would return 1, and caller(False) would return 2. The reason I want that is because I don't want the caller function to know what's going on in the called function, and be shortcut if the called function think it's necessary. Would you know if that's possible, and if so, how? I've done a bit of research and I think I've found some good pointers, in particular using the 'inspect' library: import inspect def called(arg) if arg==True: caller_frame = inspect.stack()[1] ... Here 'caller_frame' contains the frame of the caller function. Now, how can I make that frame return a particular value? By the way, I'm not really interested in 'called' throwing an exception and 'caller' catching it. In fact, I want things to remain completely transparent for 'caller'. Hope that was clear... :/ Thanks! Julien As Steven wrote, it's not very clear. If we knew the intent of this, we could perhaps point you to a more useful, maintainable technique. We don't know why you're trying to circumvent the programming language in this case. Any solution that works as you described will probably be unportable between the different Pythons (CPython, Jython, IronPython, etc). Please note that the following code should work, but I've only run it through the interpreter in my brain. My brain's interpreter is full of Heisenbugs, so you may need to adjust a few things. Here's my thoughts: Given: def First( arg ): Second( arg ) return 5 1) If you can modify both functions, change the first function to return a value in certain circumstances: def AltFirst( arg ): value = Second( arg ) if value is not None: return value return 5 2) Raise an exception in Second, and catch that exception above First: class SecondExcept(Exception): def __init__(self, value): Exception.__init__(self, 'Spam!') self.value = value def Second(arg): if arg == my_conditional_value: raise SecondExcept( 5 ) # The following could even be put in your own function, # or in a wrapper or decorator for the First function. try: myvalue = First( 'Vikings!' ) except SecondExcept, exc: myvalue = exc.value When you need to use an exceptional pathway, use an exception. They aren't just for reporting errors. Hope this helps. --Jason -- http://mail.python.org/mailman/listinfo/python-list
Re: python library to manipulate PALM documents ?
24 Mar 2008 13:36:13 GMT, Francesco Bochicchio [EMAIL PROTECTED]: Hi all, anybody knows a python equivalent of the perl PALM::Doc module (and eventually other PALM::). I have a e-book device wich reads mobi-pocket format (among others). I have downloaded from a forum a set of perl scripts to convert HTML to unencripted mobipocket format and vice-versa. It uses the PALM:: package. I would attempt (for my convenience and for the fun of it) to make a python equivalent of that. Hence my quest for a Palm::Doc equivalent. I'm not sure if it is what you are after, but it seems to be, check this: http://pypi.python.org/pypi/PalmDB/1.8.1 My googling up to now resulted in nothing relevant. Keeping searching ... Ciao - FB -- http://mail.python.org/mailman/listinfo/python-list -- -- Guilherme H. Polo Goncalves -- http://mail.python.org/mailman/listinfo/python-list
Re: Shortcutting the function call stack
On Mar 24, 9:48 am, Jason [EMAIL PROTECTED] wrote: On Mar 24, 5:21 am, Julien [EMAIL PROTECTED] wrote: Hello all, I would like to do something like: def called(arg) if arg==True: !!magic!!caller.return 1 def caller(arg) called(arg) return 2 Here, the fake !!!magic!!! represents a statement (which I ignore) that would make the caller function return a value different from what it'd return normally. For example, caller(True) would return 1, and caller(False) would return 2. The reason I want that is because I don't want the caller function to know what's going on in the called function, and be shortcut if the called function think it's necessary. Would you know if that's possible, and if so, how? I've done a bit of research and I think I've found some good pointers, in particular using the 'inspect' library: import inspect def called(arg) if arg==True: caller_frame = inspect.stack()[1] ... Here 'caller_frame' contains the frame of the caller function. Now, how can I make that frame return a particular value? By the way, I'm not really interested in 'called' throwing an exception and 'caller' catching it. In fact, I want things to remain completely transparent for 'caller'. Hope that was clear... :/ Thanks! Julien As Steven wrote, it's not very clear. If we knew the intent of this, we could perhaps point you to a more useful, maintainable technique. We don't know why you're trying to circumvent the programming language in this case. Any solution that works as you described will probably be unportable between the different Pythons (CPython, Jython, IronPython, etc). Please note that the following code should work, but I've only run it through the interpreter in my brain. My brain's interpreter is full of Heisenbugs, so you may need to adjust a few things. Here's my thoughts: Given: def First( arg ): Second( arg ) return 5 1) If you can modify both functions, change the first function to return a value in certain circumstances: def AltFirst( arg ): value = Second( arg ) if value is not None: return value return 5 2) Raise an exception in Second, and catch that exception above First: class SecondExcept(Exception): def __init__(self, value): Exception.__init__(self, 'Spam!') self.value = value def Second(arg): if arg == my_conditional_value: raise SecondExcept( 5 ) # The following could even be put in your own function, # or in a wrapper or decorator for the First function. try: myvalue = First( 'Vikings!' ) except SecondExcept, exc: myvalue = exc.value When you need to use an exceptional pathway, use an exception. They aren't just for reporting errors. Exceptions are a control tool. There was a 'goto using Exceptions' once in the manuals. I don't see a problem with a local control-flow object. It would appease a number of requests I've read. for x: for y: control.break( 2 ) if a: if b: control.fail( 2 ) so no need to reduplicate: else: thing() else: thing() if a: if b: control.mostrecenttest( 0 ) def f(): def g(): control.return( 2 )( early ) Something tells me generators could solve the problem, but I may be enamored, so it's a separate post. -- http://mail.python.org/mailman/listinfo/python-list
Element Tree Help
Hello Guys,I have little to no experiance with element tree and I'm struggling to find a way to parse the details from the XML document (attached) into my application. Essentialy I'm looking to take the following document and turn it into a dict of tuples, each dict element defines a datasource with the key to the element being the 'name' which is defined in the XML and then the value of the pair is a tuple which contains the details of the datasource, like the host and port etc.I've attached a copy of the example XML to this email.Can anyone offer some advice on how to get started with this? I've spent a little time looking over the documentation of element tree and have struggled to break the ice and parse this document.Thanks guys,Robert _ The next generation of Windows Live is here http://www.windowslive.co.uk/get-live?xml version=1.0 encoding=iso-8859-1? !DOCTYPE datasources SYSTEM datasources.dtd datasources datasource namea name/name hostlocalhost/host port3306/port databasedatabase1/database usernamesomeusername/username passwordsomepassword/password /datasource datasource nameanother name/name hostlocalhost/host port3306/port databasedatabase2/database usernameitsusername/username passwordandthepassword/password /datasource /datasources-- http://mail.python.org/mailman/listinfo/python-list
what are generators?
I'm looking for a cool trick using generators. Know any exercises I can work? -- http://mail.python.org/mailman/listinfo/python-list
Re: dividing tuple elements with an int or float
On Mar 23, 12:22 pm, Lie [EMAIL PROTECTED] wrote: On Mar 22, 2:23 pm, [EMAIL PROTECTED] wrote: Sane programmers don't write such semi-functional things (unless it helps expressing the problem in certain domains). I now think that deprecating map, lambda Co. was a good thing after all. If you write it that way the first time, you need therapy. Actually, at this point, I (for one, personally) want to investigate 'certain domains'. Tell me it's really bad at everything or what it's good at. What can I respect about it? If you (castiro..) write it your way, you'll surely win the Obfuscated Python Code Contest. Sometimes you're on a roll and you don't want to back up a step. What are good on a roll habits? (Or, what roll?) -- http://mail.python.org/mailman/listinfo/python-list
pythonweb and Leopard
I am trying to create a simple web application that is written in python, using apache and mysql. It appears as though the python web modules have been installed, however, whenever I try to run a python script, it only displays the code in the browser. It is like the python code is not getting processed. I have tried this on a iMac (Intel) and a PowerBook G4, both running Leopard. Python Web Modules 0.5.3 Apache 2.2 Python 2.5 I am trying to run the python script from the default web directory on the Mac, /Library/WebServer/Documents I updated the httpd.conf for the Directory to say Options +ExecCGI and AddHandler cgi-script .cgi .py I know that I am missing something simple. Any help would be great B -- http://mail.python.org/mailman/listinfo/python-list
Re: Element Tree Help
Robert Rawlins wrote:
Hello Guys,I have little to no experiance with element tree and I'm
struggling to find a way to parse the details from the XML document
(attached) into my application. Essentialy I'm looking to take the
following document and turn it into a dict of tuples, each dict element
defines a datasource with the key to the element being the 'name' which is
defined in the XML and then the value of the pair is a tuple which contains
the details of the datasource, like the host and port etc.I've attached a
copy of the example XML to this email.Can anyone offer some advice on how
to get started with this? I've spent a little time looking over the
documentation of element tree and have struggled to break the ice and parse
this document.Thanks guys,Robert
Given this document:
?xml version=1.0 encoding=iso-8859-1?
!DOCTYPE datasources SYSTEM datasources.dtd
datasources
datasource
namea name/name
hostlocalhost/host
port3306/port
databasedatabase1/database
usernamesomeusername/username
passwordsomepassword/password
/datasource
datasource
nameanother name/name
hostlocalhost/host
port3306/port
databasedatabase2/database
usernameitsusername/username
passwordandthepassword/password
/datasource
/datasources
I would do something like this:
d = {}
for event, element in ET.iterparse(thefile.xml):
if element.tag == datasource:
d[element.find(name)] = tuple([ el.text for el in element ])
Stefan
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Re: Element Tree Help
Stefan Behnel schrieb:
Robert Rawlins wrote:
Hello Guys,I have little to no experiance with element tree and I'm
struggling to find a way to parse the details from the XML document
(attached) into my application. Essentialy I'm looking to take the
following document and turn it into a dict of tuples, each dict element
defines a datasource with the key to the element being the 'name' which is
defined in the XML and then the value of the pair is a tuple which contains
the details of the datasource, like the host and port etc.I've attached a
copy of the example XML to this email.Can anyone offer some advice on how
to get started with this? I've spent a little time looking over the
documentation of element tree and have struggled to break the ice and parse
this document.Thanks guys,Robert
Given this document:
?xml version=1.0 encoding=iso-8859-1?
!DOCTYPE datasources SYSTEM datasources.dtd
datasources
datasource
namea name/name
hostlocalhost/host
port3306/port
databasedatabase1/database
usernamesomeusername/username
passwordsomepassword/password
/datasource
datasource
nameanother name/name
hostlocalhost/host
port3306/port
databasedatabase2/database
usernameitsusername/username
passwordandthepassword/password
/datasource
/datasources
I would do something like this:
d = {}
for event, element in ET.iterparse(thefile.xml):
if element.tag == datasource:
d[element.find(name)] = tuple([ el.text for el in element ])
Sorry, the last line should be
d[element.findtext(name)] = tuple([ el.text for el in element ])
but you'll likely have to modify that line anyway.
Stefan
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Re: URL encoding
binaryj wrote: On Mar 24, 7:04 pm, [EMAIL PROTECTED] wrote: Is there any method in the standard modules that can perform proper url encoding according to RFC? whats wrong with the current encoding ??? it just works fine!!! or is it that u dont know about urllib.urlencode() ?? I think that was obvious from the question, no need to spill punctuation marks all over the place. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Disable resize button
Il Mon, 24 Mar 2008 04:38:50 -0700, myonov ha scritto: Hi! I need to disable resize button in Tkinter. I inherit the Frame class. Then in the constructor i make my buttons, labels, etc. Then I pack them and when move borders of the frame everything changes it's location and it looks really bad. How can I change that? That's my code: # -*- coding: cp1251 -*- import Tkinter class App(Tkinter.Frame): def click(self): pass def click2(self): pass def __init__(self, master=None): Tkinter.Frame.__init__(self, master, width = 700, height = 400,\ bg = #99) self.pack() # Buttons self.b1 = Tkinter.Button(self, text = uДобави Книга,\ command=self.click, font = Courier, \ fg = red) self.b2 = Tkinter.Button(self, text = uДобави читател,\ command=self.click2, font = Courier, \ fg = red) self.b1.place(relx = 0.75, rely = 0.3) self.b2.place(relx = 0.75, rely = 0.4) # Labels self.l1 = Tkinter.Label(self, font = Courier, height = 4,\ text = uИнформация, fg = #ff,\ bg = #99) self.l1.place(x = 275, y = 10) # Text Control #self.txt = Tkinter.Text(self, bg = #124456, ) # self.txt.pack() You could try including the frame in a toplevel window (e.g. passing Tkinter.Tk() as super) and then doing super.wm_resizable(None, None) A better idea would be using pack instead of place, leaving to the toolkit the job of rearranging the widgets when the window is enlarged or reduced. Ciao - FB -- http://mail.python.org/mailman/listinfo/python-list
Re: python library to manipulate PALM documents ?
Il Mon, 24 Mar 2008 12:08:59 -0300, Guilherme Polo ha scritto: 24 Mar 2008 13:36:13 GMT, Francesco Bochicchio [EMAIL PROTECTED]: Hi all, anybody knows a python equivalent of the perl PALM::Doc module (and eventually other PALM::). I have a e-book device wich reads mobi-pocket format (among others). I have downloaded from a forum a set of perl scripts to convert HTML to unencripted mobipocket format and vice-versa. It uses the PALM:: package. I would attempt (for my convenience and for the fun of it) to make a python equivalent of that. Hence my quest for a Palm::Doc equivalent. I'm not sure if it is what you are after, but it seems to be, check this: http://pypi.python.org/pypi/PalmDB/1.8.1 It could be. I read that mobipocket files may have extension .prc. Ciao FB -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as a firstprogramming language?)
Paul RubinIt's at least pretty good. It's not ideal, but nothing ever is. I agree. At the moment Python is among the best languages for that, but it's not perfect for that purpose. I think newbies may need a bit more structured language, where you have to put things in a certain order to have a working program. I think this may teach them some good programming habits. Pascal is a bit too much old today, but it helps learn how to program in a tidy way. I am not sure about this, I'd like to have more data to be able to sort out this freedom/structure alternative regarding teaching languages. Another possible downside of Python is that it doesn't allow you to know very well what's under the language, so you can't use pointers and memory very well, so you can't learn those things very well. You need a different language for that, like C (or Pascal) or assembly, but such languages are useful later, and less as very first languages, especially for very young people. Paul RubinChris Okasaki (of functional data structures fame) has an interesting blog post about why indentation-based structuring is a big help for teaching: I have quite appreciated that article, and other people are doing similar things for C and C++ (I'd like to do something similar for D): http://blog.micropledge.com/2007/09/nobraces/ And OCaml: http://people.csail.mit.edu/mikelin/ocaml+twt/ Arnaud DelobelleMy other 'coming of age' was when I took a lambda- calculus course at university. I felt like a man who's had a black and white TV set all his life and watches colour TV for the first time. Scheme-like languages are surely interesting, and eventually a programmer can learn one of them, but I think as a very first language Python is fitter, because its syntax is more compatible with a normal little trained human mind. 7studBeginning programmers in grades 9-12 are not going to understand issues like that, and it would be a mistake to try and introduce them. Beginning programmers should be concentrating their efforts on learning the syntax of a language and basic constructs like for-loops and if statements. This is wrong. Some languages like Scheme are quite fit for young people, and they don't even need a for loop. A 7-9 years old person is able to understand quite a lot, and computer science and programming aren't based on syntax. They are more based on the fun of problem solving, and similar things. Syntax is important because it's the tool that allows you to tell the computer how to compute the results of the problems you have (usually) already solved, but it can't be the purpose, even in a first course of programming. When you want to teach painting to a 6 year old child your purpose isn't teaching her/him all about the structure of the canvas and brushes and the chemistry of the pigments, but how to have fun putting all the colors on the canvas/ paper, trying to create some image, for fun. (On the other hand you can teach to love chemistry to a 6-8 year old person, showing how much it can be fun, if you start talking about the chemistry behind the colors of fireworks, but that's not panting anymore). Ben CWhy does Python not have a switch or until statement? Maybe because it thinks syntax minimalism is a virtue, or maybe because they aren't easy to add (try to design a do-while using Python- like syntax). Ben CWhy are very common objects (stack, queue, linked list) not builtin? etc. Because it was a small language, used for scripting purposes, I think. You need those data structures if you want higher performance (in speed and/or memory used) but performance was not one of the main purposes of Python. Another purpose for those data structures is to teach them, but a good teaching language is probably one that allows you to write your own versions of them. Today the collections module and other built-in modules gives you some of those data structures, you just need to import them, so using them isn't much a hassle, even if they aren't built in. AahzThe problem with lambda is that too often it results in clutter Probably I am missing your point, but I'd like to remind people the syntax for lambdas in the last C# versions: x, y = x * 2 + y Instead of the Python syntax: lambda x, y: x * 2 + y I think that C# syntax is nice and readable enough. Terry Reedy[lot of things] Yes, fundamentally different categories of types are (sensibly) treated differently with repect to definition and namespace names, but calling that 'disharmony' depends on the listener. Thank you for your interesting explanation. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
RE: Element Tree Help
Robert Rawlins wrote:
I have little to no experiance with element tree and I'm struggling to
find a way to parse the details from the XML document (attached) into
my application. Essentialy I'm looking to take the following document
and turn it into a dict of tuples, each dict element defines a
datasource with the key to the element being the 'name' which is
defined in the XML and then the value of the pair is a tuple which
contains the details of the datasource, like the host and port etc.
Here's another way to walk an ElementTree. This one creates a hash of hashes
which are normally more useful than tuples for property lookups.
import xml.etree.ElementTree as ET
tree = ET.ElementTree(file = foo.xml)
d = {}
for ds in tree.findall(datasource):
name = ds.find('name').text
d[name] = {}
print 'datasource =', name
for i in ds.findall('*'):
#for i in ds.getiterator(): # also works
if i.tag in ('datasource', 'name'):
continue
print '',i.tag, =, i.text
d[name][i.tag] = i.text
print
print d
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Problems with wxPython
Hi, If ther's anyone who knows pretty much about wxPython can e-mail me? I'm having some trouble in dealing with some guis here, I would thank u very much if you could help me bye []'s -- http://mail.python.org/mailman/listinfo/python-list
Re: Need help calling a proprietary C DLL from Python
On Mar 23, 7:59 pm, Dennis Lee Bieber [EMAIL PROTECTED] wrote: On Sun, 23 Mar 2008 14:24:52 -0700 (PDT), Craig [EMAIL PROTECTED] declaimed the following in comp.lang.python: This dll was designed to be used from either C or Visual Basic 6. I have the declare statements for VB6, if that helps. Probably not that much -- I'd bet it's full of variant records G Based on the results I have so far (and I have tried MANY permutations like trying to use the LPSTR for SecKey and PriKey which are returned as is TypeDef), it looks like SecKey and PriKey are being used as data instead of pointers. For this, I try: LPSTR = c_char_p VmxGet.argtypes = [LPHANDLE, LPSHORT, LPSHORT, LPBSTR, LPSTR, LPBSTR, LPSTR] SrchKey = windll.oleaut32.SysAllocStringByteLen(MSD19DN \x00, 41) SecKey = create_string_buffer(41) SecKey.raw = 1234567890123456789012345678901234567890 PriKey = windll.oleaut32.SysAllocStringByteLen(ABCDEFGHIJKLMNOPQRSTUVWXYZ12345678901234\x00, 41) TypeDef = create_string_buffer(128) TypeDef.raw = X.center(128, X) res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), SecKey, byref(c_void_p(PriKey)), TypeDef ) and I get: Traceback (most recent call last): File C:\temp\vbisam_test_2.py, line 158, in module res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(S rchKey)), SecKey, byref(c_void_p(PriKey)), TypeDef ) WindowsError: exception: access violation reading 0x3433322D I notice that SecKey.raw starts with 1234 and the exception address is 0x3433322D, which is 432-. 0x2D is 4 less than the expected 0x31... And, changing to: VmxGet.argtypes = [LPHANDLE, LPSHORT, LPSHORT, LPBSTR, LPBSTR, LPSTR, LPSTR] PriKey = create_string_buffer(41) PriKey.raw = ABCDEFGHIJKLMNOPQRSTUVWXYZ12345678901234 res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), byref(c_void_p(SecKey)), PriKey, TypeDef ) I then get: Traceback (most recent call last): File C:\temp\vbisam_test_2.py, line 159, in module res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(S rchKey)), byref(c_void_p(SecKey)), PriKey, TypeDef ) WindowsError: exception: access violation reading 0x4443423D I notice that PriKey.raw starts with ABCD and the exception address is 0x4443423D, which is DBC=. ... and 0x3D is 4 less than the expected 0x41 Which leads me to suspect that BSTR are a structure, not a plain string, in which the address given is supposed to be prefaced with a length value. IOWs, something like: ||--| ^^ C-string data ||Address to be passed |(address - 4) to get to a length count field Confirmed:http://msdn2.microsoft.com/en-us/library/ms221069(VS.85).aspx (the URL is from HTTP through to the end, including .aspx) Creating such may not be difficult -- but passing it to the DLL could be. I don't know if ctypes allows pointer arithmetic. ctypes OLESTR is a c_wchar_p, but that is still a c-style string with no length prefix. The only mention of BSTR in the win32 extensions is in text that implies that the win32 extension library takes care of converting from/to BSTR and Python strings transparently -- but that won't work for your third-party library I suspect. Might have to beg the author(s) of ctypes to add a BSTR type to the list of those supported... as I can find no means of tweaking the address computed by byref() to point somewhere into a structure rather than the beginning of the structure. pk = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 12) pk 1373844 id(pk) 18941724 ctypes.string_at(pk) '1234567890' ctypes.string_at(pk-4, 20) '\x0c\x00\x00\x001234567890\x00\x01\x00\x00\x00\x00' Okay, the return value from SysAlloc... IS the integer representing the address of a BSTR structure (IE, the address four bytes in from the real memory start)... Note how backing up 4 bytes reveals the BSTR length field What happens if you just pass that item as-is, no byref(), no conversion to ctypes pointer types... PriKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) SecKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), SecKey, PriKey, TypeDef ) PriKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) ctypes.string_at(PriKey, 41) 1234567890\x00\x01:\x00\x00\x00\xb6\x01\x00\x000\x99#\x01\xe0\x94\x1a\x1e\x0b\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00' ctypes.string_at(PriKey-4, 41+4)
python, dbus and pointers help.
''' hello, using pidgin instant messenger I can get the value of 'message' when one is being sent but, I dont know how to chage the value of message. from the documentation (http://developer.pidgin.im/doxygen/dev/html/ conversation-signals.html#sending-im-msg): _ sending-im-msg: Emitted before sending an IM to a user. message is a pointer to the message string, so the plugin can replace the message before being sent. _ I think python get's a copy of the message (this is just a guess). How can I change the message before it is sent? Thanks. The code is taken from http://developer.pidgin.im/wiki/DbusHowto#Furtherreading and changed only a small amount. ''' #!/usr/bin/env python def cb_func(account, rec, message): #change message here somehow? print message import dbus, gobject from dbus.mainloop.glib import DBusGMainLoop dbus.mainloop.glib.DBusGMainLoop(set_as_default=True) bus = dbus.SessionBus() bus.add_signal_receiver(cb_func, dbus_interface=im.pidgin.purple.PurpleInterface, signal_name=SendingImMsg) loop = gobject.MainLoop() loop.run() -- http://mail.python.org/mailman/listinfo/python-list
Re: python, dbus and pointers help.
or a way of letting me see the message then cancel sending it then I could create a new message and send that one. but I cant see this in the documentation -- http://mail.python.org/mailman/listinfo/python-list
Re: Problems with wxPython
Hi David, 2008/3/24, David Anderson [EMAIL PROTECTED]: Hi, If ther's anyone who knows pretty much about wxPython can e-mail me? I'm having some trouble in dealing with some guis here, I would thank u very much if you could help me You should subscribe to the wxPython users mailinglist and ask there. It's a very helpful mailinglist. Robin Dunn (wxPython author) is very active in answering questions from wxPython users. See http://www.wxpython.org/maillist.php Cheers, Frank -- http://mail.python.org/mailman/listinfo/python-list
Is IronPython real Python?
I know that IronPython and CPython are different in that one does not use the .net framework, but are they both really the same Python language. From my basic understanding, it will depend on what the programmer's goal is as to which of the two would be used, but I didn't know if they were really the same language. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is IronPython real Python?
On Mar 24, 12:00 pm, jmDesktop [EMAIL PROTECTED] wrote: I know that IronPython and CPython are different in that one does not use the .net framework, but are they both really the same Python language. From my basic understanding, it will depend on what the programmer's goal is as to which of the two would be used, but I didn't know if they were really the same language. I would say that they're mostly the same. IronPython allows the developer to use any of the .NET libraries within their Python program, much like Jython allows Python to import Java libraries. The main IronPython website has a wiki that outlines the differences: http://www.codeplex.com/IronPython/Wiki/View.aspx?title=DifferencesreferringTitle=Home Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: Installing Mutagen Package On Windows
En Mon, 24 Mar 2008 03:25:02 -0300, Benjamin Serrato [EMAIL PROTECTED] escribió: Hey, I've run into another problem. I am trying to install the Mutagen package to use as my first useful program, but can't figure out how to install it on windows. The README says it is a simple application of-- Installing -- $ ./setup.py build $ su -c ./setup.py install --but I ran c:\python c:\python25\tools\scripts\setup.py build and did similarly for setup.py. I also added c:\python25 and c:\python25\tools\scripts to my path, but this hasn't worked. I have The setup.by you have to run is the one included in the Mutagen package, not that one. Unless the author provides more specific instructions, the usual way is: - Unpack the archive into any temporary directory - Open a console (cmd) and change to that temporary directory (cd c:\some\temp\dir) - Execute this command: python setup.py install - That's all If you get any error, post the whole error message here, but for specific help on the package it would be better to contact the author directly. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Serving an external web site which requires authentication
Hi, I need your suggestions about the topic. Actually, I'm not sure where to start but basically, I want to make something like; (I have an account on a site which requires log-in) - I'll be logged-in to that site with my account in my server. - And when a user connects to my site, I'll forward him/her to that site, using my account even if he/she doesn't have an account on that site... probably, I need to develop a proxy to do this, but I'm not sure... (I'm developing a django site) I really appreciate your ideas. -- http://mail.python.org/mailman/listinfo/python-list
importing package contents from multiple places in PYTHONPATH
Hi all, I'm new to python, and am trying to determine if it's possible to do the following... I have a directory structure like this, with both 'dir1' and 'dir2' in my PYTHONPATH dir1/ foo/ __init__.py a.py b.py dir2/ foo/ __init__.py a.py c.py I'd like to be able to: python import foo.a, foo.b, foo.c I'd hope for package 'foo.a' to come from dir1 since it was first on the path, with 'foo.b' and 'foo.c' coming form dir1 and dir2 respectively. I understand that python stops once it encounters the first 'foo' package in PYTHONPATH, but I was wondering if there was a way around this. I've had some success modifying __path__ in the foo/__init__.py files, but am unsure if this is the best approach. Perhaps there's a way to do this with import hooks? Is there a precedent for this type of thing? Thanks in advance, Josh -- http://mail.python.org/mailman/listinfo/python-list
ANN: Tobu 0.4j
This is an initial announcement. Tobu is a freeform database / tagger / PIM and more. It works in both Linux and Windows and uses wxPython framework and pysqlite. Comments, suggestions, feature requests and critique are gladly appreciated. Tutorial with links to download page and to graphical overview page is located at the following link. It's best to start with graphical overview page that shows screenshots of main window and menus with thorough explanations of functionality of most items. http://www.lightbird.net/tobu/ -- http://mail.python.org/mailman/listinfo/python-list
behavior varied between empty string '' and empty list []
while I can invoke methods of empty string '' right in typing
(''.join(), etc.) I can't do the same with empty list
example:
a = [1,2,3]
b = [].extend(a)
b
b = []
b.extend(a)
b
[1,2,3]
I would not use b = a since I don't want changes on 'b' to apply on
'a'
do you think this should be available on lists to invoke method
directly?
--
http://mail.python.org/mailman/listinfo/python-list
Impersonate another user (Guest) on Windows
Hi, I'm trying to write a plug-in for a ftp server of mine to permit the integration with accounts defined on the Windows system. What I basically need is impersonating a user, execute e filesystem call (e.g. create a directory via os.mkdir()) and then switch back to the original user (Administrator). I wrote down this simple class which seems to fit pretty well for my purposes: class WinNTAuthorizer: def impersonate_user(self, username, password): self.impersonated_user_handler = win32security.LogonUser( username, None, password, win32con.LOGON32_LOGON_INTERACTIVE, win32con.LOGON32_PROVIDER_DEFAULT) win32security.ImpersonateLoggedOnUser(self.impersonated_user_handler) def terminate_impersonation(self): win32security.RevertToSelf() self.impersonated_user_handler.Close() What I need now is impersonating the Guest user to handle the anonymous logins (which it's exactly what IIS FTPd does) but I don't know how to do it. Does Guest account has a password or do I have to use something different than LogonUser to manage it? Could someone point me in the right direction? Thanks in advance. --- Giampaolo http://code.google.com/p/pyftpdlib -- http://mail.python.org/mailman/listinfo/python-list
Re: Problems with wxPython
Thanx On Mon, Mar 24, 2008 at 2:00 PM, Frank Niessink [EMAIL PROTECTED] wrote: Hi David, 2008/3/24, David Anderson [EMAIL PROTECTED]: Hi, If ther's anyone who knows pretty much about wxPython can e-mail me? I'm having some trouble in dealing with some guis here, I would thank u very much if you could help me You should subscribe to the wxPython users mailinglist and ask there. It's a very helpful mailinglist. Robin Dunn (wxPython author) is very active in answering questions from wxPython users. See http://www.wxpython.org/maillist.php Cheers, Frank -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: importing package contents from multiple places in PYTHONPATH
En Mon, 24 Mar 2008 15:06:51 -0300, [EMAIL PROTECTED] escribió: Hi all, I'm new to python, and am trying to determine if it's possible to do the following... I have a directory structure like this, with both 'dir1' and 'dir2' in my PYTHONPATH dir1/ foo/ __init__.py a.py b.py dir2/ foo/ __init__.py a.py c.py I'd like to be able to: python import foo.a, foo.b, foo.c I'd hope for package 'foo.a' to come from dir1 since it was first on the path, with 'foo.b' and 'foo.c' coming form dir1 and dir2 respectively. Yes. Note that dir2/foo/__init__.py is not used at all and it's just confusing. And a.py (in dir2) won't be found inside the package but any import a from c.py will import that one instead of the one at dir1. dir2/foo is just a bag, not a package :) I understand that python stops once it encounters the first 'foo' package in PYTHONPATH, but I was wondering if there was a way around this. I've had some success modifying __path__ in the foo/__init__.py files, but am unsure if this is the best approach. I think it is the simplest approach, if not the only one... Perhaps there's a way to do this with import hooks? Perhaps... But appending a single item to __path__ is simple enough to stop further thinking from my side :) Anyway, why do you want to do that? Can't use a different name for dir2/foo, and perhaps import its modules from inside dir1/foo/__init__.py? -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
New to group
Hi Everyone I am new to programming in general although I have read alot and done alot of experimentation as well as researched afew languages namely java python and visual basic . My conclusion is that python is one of the best because it eliminates the need to learn about access modifiers and form handlers so a user can concentrate primarliy on the nuts and bolts of the language . i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 All help much appreciated ! -- http://mail.python.org/mailman/listinfo/python-list
Re: behavior varied between empty string '' and empty list []
En Mon, 24 Mar 2008 15:22:43 -0300, Tzury Bar Yochay
[EMAIL PROTECTED] escribió:
while I can invoke methods of empty string '' right in typing
(''.join(), etc.) I can't do the same with empty list
example:
a = [1,2,3]
b = [].extend(a)
b
b = []
b.extend(a)
b
[1,2,3]
extend() -like most mutating methods- does not return the list, it returns
None.
Your empty list grow the 3 additional items, but since there were no
additional references to it, got destroyed.
I would not use b = a since I don't want changes on 'b' to apply on
'a'
Try with b = list(a)
do you think this should be available on lists to invoke method
directly?
You already can. Your example is misleading because you used b with two
meanings.
(Compare the *usage* of each variable/value, not their names). This is
equivalent to the second part of your example:
py a = [1,2,3]
py b = []
py b.extend(a)
py b
[1, 2, 3]
and this is the first part:
py a = [1,2,3]
py b = []
py c = b.extend(a)
py c
py b
[1, 2, 3]
except that in your original example, the empty list had no name so you
cannot see how it changed.
--
Gabriel Genellina
--
http://mail.python.org/mailman/listinfo/python-list
Re: New to group
What does the code look like? -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 1:53 pm, pythonnubie [EMAIL PROTECTED] wrote: Hi Everyone I am new to programming in general although I have read alot and done alot of experimentation as well as researched afew languages namely java python and visual basic . My conclusion is that python is one of the best because it eliminates the need to learn about access modifiers and form handlers so a user can concentrate primarliy on the nuts and bolts of the language . i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 All help much appreciated ! Please post the code that throws this error along with the entire traceback. Thanks, Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 11:57 am, Jeff [EMAIL PROTECTED] wrote: What does the code look like? # Random Access # Demonstrates string indexing # Michael Dawson - 1/27/03 import random word = index print The word is: , word, \n high = len(word) low = -len(word) for i in range(10): position = random.randrange(low, high) print word[, position, ]\t, word[position] raw_input(\n\nPress the enter key to exit.) The code is an exerp from a chm file . I am petty sutre I am nmot getting a char map error from the copy/paste ! it looks simple enough ! -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 2:53 pm, pythonnubie [EMAIL PROTECTED] wrote: Hi Everyone I am new to programming in general although I have read alot and done alot of experimentation as well as researched afew languages namely java python and visual basic . My conclusion is that python is one of the best because it eliminates the need to learn about access modifiers and form handlers so a user can concentrate primarliy on the nuts and bolts of the language . i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 Welcome aboard! There's definitely a randrange function in the random module, so something else must be wrong. To get the most out of this list and minimize wasted bandwidth, the most effective way usually consists of copying and pasting: 1. The offending code (or just the relevant part if it's too big). 2. The full traceback of the raised exception. Regards, George -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
pythonnubie wrote: On Mar 24, 11:57 am, Jeff [EMAIL PROTECTED] wrote: What does the code look like? # Random Access # Demonstrates string indexing # Michael Dawson - 1/27/03 import random Make sure that you do not have a random.py module in the current directory. Python checks the current directory for modules before the standard directories. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 Welcome aboard! There's definitely a randrange function in the random module, so something else must be wrong. To get the most out of this list and minimize wasted bandwidth, the most effective way usually consists of copying and pasting: 1. The offending code (or just the relevant part if it's too big). 2. The full traceback of the raised exception. Regards, George Hwere is the complete traceback ! The word is: index Traceback (most recent call last): File F:\Python25\Lib\site-packages\pythonwin\pywin\framework \scriptutils.py, line 307, in RunScript debugger.run(codeObject, __main__.__dict__, start_stepping=0) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \__init__.py, line 60, in run _GetCurrentDebugger().run(cmd, globals,locals, start_stepping) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \debugger.py, line 631, in run exec cmd in globals, locals File F:\Documents and Settings\Mark\My Documents\rand.py, line 5, in module import random File F:\Documents and Settings\Mark\My Documents\random.py, line 13, in module distributions on the real line: AttributeError: 'module' object has no attribute 'randrange' Why would it say it can't find the function ? Mark -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 3:03 pm, pythonnubie [EMAIL PROTECTED] wrote: On Mar 24, 11:57 am, Jeff [EMAIL PROTECTED] wrote: What does the code look like? # Random Access # Demonstrates string indexing # Michael Dawson - 1/27/03 import random word = index print The word is: , word, \n high = len(word) low = -len(word) for i in range(10): position = random.randrange(low, high) print word[, position, ]\t, word[position] raw_input(\n\nPress the enter key to exit.) The code is an exerp from a chm file . I am petty sutre I am nmot getting a char map error from the copy/paste ! it looks simple enough ! It works fine on on Windows with standard Python 2.5. Something is probably wrong with your ActiveState installation. George -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
pythonnubie wrote: The exeption is no such attribute in module random Is your own source file named random.py by chance? If so, rename it, and be sure to remove the leftover random.pyc file as well. Jeffrey -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
pythonnubie wrote: On Mar 24, 11:57 am, Jeff [EMAIL PROTECTED] wrote: What does the code look like? # Random Access # Demonstrates string indexing # Michael Dawson - 1/27/03 import random word = index print The word is: , word, \n high = len(word) low = -len(word) for i in range(10): position = random.randrange(low, high) print word[, position, ]\t, word[position] raw_input(\n\nPress the enter key to exit.) The code is an exerp from a chm file . I am petty sutre I am nmot getting a char map error from the copy/paste ! it looks simple enough ! You have probably called your script random.py, and now it imports itself instead of the random.py module in Python's standard library. Rename your script to myrandom.py, remove the compiled version random.pyc in the same folder, and you should be able to run it successfully. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 3:13 pm, pythonnubie [EMAIL PROTECTED] wrote: i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 Welcome aboard! There's definitely a randrange function in the random module, so something else must be wrong. To get the most out of this list and minimize wasted bandwidth, the most effective way usually consists of copying and pasting: 1. The offending code (or just the relevant part if it's too big). 2. The full traceback of the raised exception. Regards, George Hwere is the complete traceback ! The word is: index Traceback (most recent call last): File F:\Python25\Lib\site-packages\pythonwin\pywin\framework \scriptutils.py, line 307, in RunScript debugger.run(codeObject, __main__.__dict__, start_stepping=0) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \__init__.py, line 60, in run _GetCurrentDebugger().run(cmd, globals,locals, start_stepping) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \debugger.py, line 631, in run exec cmd in globals, locals File F:\Documents and Settings\Mark\My Documents\rand.py, line 5, in module import random File F:\Documents and Settings\Mark\My Documents\random.py, line 13, in module distributions on the real line: AttributeError: 'module' object has no attribute 'randrange' Why would it say it can't find the function ? Because you named your file 'random.py' and it shadows the standard random module! Change the name to something else, say foo.py, and try it again. George -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 12:18 pm, George Sakkis [EMAIL PROTECTED] wrote: On Mar 24, 3:13 pm, pythonnubie [EMAIL PROTECTED] wrote: i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 Welcome aboard! There's definitely a randrange function in the random module, so something else must be wrong. To get the most out of this list and minimize wasted bandwidth, the most effective way usually consists of copying and pasting: 1. The offending code (or just the relevant part if it's too big). 2. The full traceback of the raised exception. Regards, George Hwere is the complete traceback ! The word is: index Traceback (most recent call last): File F:\Python25\Lib\site-packages\pythonwin\pywin\framework \scriptutils.py, line 307, in RunScript debugger.run(codeObject, __main__.__dict__, start_stepping=0) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \__init__.py, line 60, in run _GetCurrentDebugger().run(cmd, globals,locals, start_stepping) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \debugger.py, line 631, in run exec cmd in globals, locals File F:\Documents and Settings\Mark\My Documents\rand.py, line 5, in module import random File F:\Documents and Settings\Mark\My Documents\random.py, line 13, in module distributions on the real line: AttributeError: 'module' object has no attribute 'randrange' Why would it say it can't find the function ? Because you named your file 'random.py' and it shadows the standard random module! Change the name to something else, say foo.py, and try it again. George- Hide quoted text - - Show quoted text - -- http://mail.python.org/mailman/listinfo/python-list
Re: Need help calling a proprietary C DLL from Python
On Mar 24, 12:27 pm, Craig [EMAIL PROTECTED] wrote: On Mar 23, 7:59 pm, Dennis Lee Bieber [EMAIL PROTECTED] wrote: On Sun, 23 Mar 2008 14:24:52 -0700 (PDT), Craig [EMAIL PROTECTED] declaimed the following in comp.lang.python: This dll was designed to be used from either C or Visual Basic 6. I have the declare statements for VB6, if that helps. Probably not that much -- I'd bet it's full of variant records G Based on the results I have so far (and I have tried MANY permutations like trying to use the LPSTR for SecKey and PriKey which are returned as is TypeDef), it looks like SecKey and PriKey are being used as data instead of pointers. For this, I try: LPSTR = c_char_p VmxGet.argtypes = [LPHANDLE, LPSHORT, LPSHORT, LPBSTR, LPSTR, LPBSTR, LPSTR] SrchKey = windll.oleaut32.SysAllocStringByteLen(MSD19DN \x00, 41) SecKey = create_string_buffer(41) SecKey.raw = 1234567890123456789012345678901234567890 PriKey = windll.oleaut32.SysAllocStringByteLen(ABCDEFGHIJKLMNOPQRSTUVWXYZ12345678901234\x00, 41) TypeDef = create_string_buffer(128) TypeDef.raw = X.center(128, X) res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), SecKey, byref(c_void_p(PriKey)), TypeDef ) and I get: Traceback (most recent call last): File C:\temp\vbisam_test_2.py, line 158, in module res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(S rchKey)), SecKey, byref(c_void_p(PriKey)), TypeDef ) WindowsError: exception: access violation reading 0x3433322D I notice that SecKey.raw starts with 1234 and the exception address is 0x3433322D, which is 432-. 0x2D is 4 less than the expected 0x31... And, changing to: VmxGet.argtypes = [LPHANDLE, LPSHORT, LPSHORT, LPBSTR, LPBSTR, LPSTR, LPSTR] PriKey = create_string_buffer(41) PriKey.raw = ABCDEFGHIJKLMNOPQRSTUVWXYZ12345678901234 res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), byref(c_void_p(SecKey)), PriKey, TypeDef ) I then get: Traceback (most recent call last): File C:\temp\vbisam_test_2.py, line 159, in module res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(S rchKey)), byref(c_void_p(SecKey)), PriKey, TypeDef ) WindowsError: exception: access violation reading 0x4443423D I notice that PriKey.raw starts with ABCD and the exception address is 0x4443423D, which is DBC=. ... and 0x3D is 4 less than the expected 0x41 Which leads me to suspect that BSTR are a structure, not a plain string, in which the address given is supposed to be prefaced with a length value. IOWs, something like: ||--| ^^ C-string data ||Address to be passed |(address - 4) to get to a length count field Confirmed:http://msdn2.microsoft.com/en-us/library/ms221069(VS.85).aspx (the URL is from HTTP through to the end, including .aspx) Creating such may not be difficult -- but passing it to the DLL could be. I don't know if ctypes allows pointer arithmetic. ctypes OLESTR is a c_wchar_p, but that is still a c-style string with no length prefix. The only mention of BSTR in the win32 extensions is in text that implies that the win32 extension library takes care of converting from/to BSTR and Python strings transparently -- but that won't work for your third-party library I suspect. Might have to beg the author(s) of ctypes to add a BSTR type to the list of those supported... as I can find no means of tweaking the address computed by byref() to point somewhere into a structure rather than the beginning of the structure. pk = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 12) pk 1373844 id(pk) 18941724 ctypes.string_at(pk) '1234567890' ctypes.string_at(pk-4, 20) '\x0c\x00\x00\x001234567890\x00\x01\x00\x00\x00\x00' Okay, the return value from SysAlloc... IS the integer representing the address of a BSTR structure (IE, the address four bytes in from the real memory start)... Note how backing up 4 bytes reveals the BSTR length field What happens if you just pass that item as-is, no byref(), no conversion to ctypes pointer types... PriKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) SecKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), SecKey, PriKey, TypeDef ) PriKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) ctypes.string_at(PriKey, 41)
Re: beginners question about return value of re.split
On Fri, 21 Mar 2008 13:34:27 -0700, John Machin wrote:
On Mar 22, 2:53 am, klaus [EMAIL PROTECTED] wrote:
On Fri, 21 Mar 2008 10:31:20 -0500, Tim Chase wrote:
..
Ok thank you !
I think I got a bit lost in all the possibilities python has to offer.
IMHO you got more than a bit lost. You seem to have stumbled on a
possibly unintended side effect of re.split.
What is your underlying goal?
If you want merely to split on '-', use datum.split('-').
If you want to verify the split results as matching patterns (4 digits,
2 digits, 2 digits), use something like this:
| import re
| datum = '2008-03-14'
| pattern = r'^(\d\d\d\d)-(\d\d)-(\d\d)\Z' You may notice two
differences between my pattern and yours ...
| mobj = re.match(pattern, datum) | mobj.groups()
| ('2008', '03', '14')
But what are you going to do with the result? If the resemblance between
'2008-03-14' and a date is not accidental, you may wish to consider
going straight from a string to a datetime or date object, e.g.
| import datetime
| dt = datetime.datetime.strptime(datum, '%Y-%m-%d')
| dt
| datetime.datetime(2008, 3, 14, 0, 0)
| d =
datetime.datetime.date(dt)
| d
| datetime.date(2008, 3, 14)
HTH,
John
Ok, sorry for my late reply. I got caught up in a fight with easterbunnys
over some extraordinary large, fruitty and fertile eggs. Some creatures
take Easter just to serious and it is not even mating season ! Can you
believe that ?
:-)
Anyway, the underlying goal was to verify user input and to split up the
date so that I could easily convert it to another format. Among others,
an url and for a database querry. And I have succeeded in that.
Thank you again; for taking the time to explain - and to question.
KL.
--
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Re: PyCon video editing
On Mar 18, 10:09 am, amk [EMAIL PROTECTED] wrote: On Mar 17, 10:00 pm, dundeemt [EMAIL PROTECTED] wrote: Anyone know who is in charge of this? I'd like to help out if I could. I am, but haven't set anything up yet, such as a mailing list or a host for the video. I'll update the wiki pagehttp://wiki.python.org/moin/PyConRecordingBof with news/further developments (you can create a wiki account and follow the envelope icon at the upper right to be notified of changes via e-mail). --amk Somebody has stuck a few videos on Youtube already: http://www.youtube.com/user/pycon08 Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: Is this doable
I have a little problem. I have a script that is in the scheduler (win32). But every now and then I update this script and I dont want to go to every computer and update it. Can't you just put the script on a network share? Tobiah -- Posted via a free Usenet account from http://www.teranews.com -- http://mail.python.org/mailman/listinfo/python-list
SoC project: Python-Haskell bridge - request for feedback
Hi, I am a student interested in participating in this year's SoC. At http://tsk.ch.uj.edu.pl/~janeczek/socapp.html (and also below in this email) you can find a draft of my project proposal. I'd like to ask you to comment on it, especially the deliverables part. Are you interested in such a project, and if yes, what features would be most important to you? Is anything missing, or should something get more priority or attention? Regards, Michal Python-Haskell bridge = Description --- This project will seek to provide a comprehensive, high level (and thus easy to use) binding between Haskell and Python programming languages. This will allow using libraries of either side from each language. Benefits for Python --- * Robust, high assurance components It might be beneficial to implement safety-critical components in a strongly, statically typed language, using Python to keep them together. Cryptography or authentication modules can be an example. * Performance improvements for speed-critical code Haskell compiled to native code is typically an order of magnitude faster than Python. Aside from that, advanced language features (such as multicore parallel runtime, very lightweight threads and software transactional memory) further serve in improving the performance. Haskell could become a safe, high level alternative to commonly used C extensions. * Access to sophisticated libraries While its set of libraries is not as comprehensive as that of Python, Haskell can still offer some well tested, efficient libraries. Examples might be rich parser combinator libraries (like Parsec) and persistent, functional data structures. QuickCheck testing library could also be used to drive analysis of Python code. Benefits for Haskell The project would benefit Haskell by providing it with access to an impressive suite of libraries. It also has a potential to help Haskell adoption, by mitigating risk of using Haskell in a project. Deliverables * A low level library to access Python objects from Haskell * A set of low level functions to convert built-in data types between Haskell and Python (strings, numbers, lists, dictionaries, functions, generators etc.) * A higher level library allowing easy (transparent) access to Python functions from Haskell, and wrapping Haskell functions for Python to access * A way to easily derive conversion functions for user-defined data types/objects. Functions derived in such a way should work well with both low level and high level access libraries * Documentation and a set of examples for all of above Optional goals -- These are of lower priority, and might require a fair amount of work. I would like to implement most of them, if technically feasible. If they don't fit into Summer of Code timeframe, I am planning to finish afterwards. * A Python module for accessing functions from Haskell modules without manual wrapping (such wrapping should be already easy thanks to the high level library). It'd be accomplished through GHC api - if it allows it. The Haskell side of the high level library will already support such mode of operation * Extend and refactor the code, to make it support other similar dynamic languages. This is a lot of work, and definitely out of the scope of Summer of Code project, but some design decisions may be influenced by this. Related projects They (and quite possibly some others) will be referenced for ideas. * MissingPy Provides a one way, low level binding to Python. Some of the code can be possibly reused, especially data conversion functions. It doesn't seem to export all features, in particular function callbacks are not supported * HaXR XML-RPC binding for Haskell. It could provide inspiration for reconciling Haskell and Python type systems, resulting in a friendly interface * rocaml A binding between Ruby and OCaml -- http://mail.python.org/mailman/listinfo/python-list
Re: encoding/decoding issue with python2.5 and pymssql
Tzury Bar Yochay wrote in news:3a6c32fe-e7c1-4230-882d-efb3415196c1 @b1g2000hsg.googlegroups.com in comp.lang.python: for example: the value 'EE604EE3-4AB0-4EE7-AF4D-018124393CD7' is represent as '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9\xd7' from uuid import * u = UUID( bytes = '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9\xd7') print u u = UUID( bytes_le = '\xe3N`\xee\xb0J\xe7N\xafM\x01\x81$9\xd7') print u The bytes_le version prints: ee604ee3-4ab0-4ee7-af4d-018124393cd7 so I guess, this is what mysql is returning. http://docs.python.org/lib/module-uuid.html Rob. -- http://www.victim-prime.dsl.pipex.com/ -- http://mail.python.org/mailman/listinfo/python-list
Paramiko bugs out on windows 2003 server
I am using the paramiko library to pull a data from a server using SFTP. It works perfect on a windows xp machine but bugs out a windows 2003 server. I get the following error: Traceback (most recent call last): File S:\Temp\ftpBOA.py, line 5, in ? import paramiko File C:\Python23\lib\paramiko\__init__.py, line 69, in ? from transport import randpool, SecurityOptions, Transport File C:\Python23\lib\paramiko\transport.py, line 32, in ? from paramiko import util File C:\Python23\lib\paramiko\util.py, line 31, in ? from paramiko.common import * File C:\Python23\lib\paramiko\common.py, line 98, in ? from osrandom import OSRandomPool File C:\Python23\lib\paramiko\osrandom.py, line 54, in ? raise ImportError(Cannot find OS entropy source) ImportError: Cannot find OS entropy source Anyone knows how to solve it ? Tarun Kapoor Disclaimer This e-mail and any attachments is confidential and intended solely for the use of the individual(s) to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of Waterstone Capital Management, L.P and affiliates. If you are not the intended recipient, be advised that you have received this e-mail in error and that any use, dissemination, printing, forwarding or copying of this email is strictly prohibited. Please contact the sender if you have received this e-mail in error. You should also be aware that e-mails are susceptible to interference and you should not assume that the contents of this e-mail originated from the sender above or that they have been accurately reproduced in their original form. Waterstone Capital Management, L.P. and affiliates accepts no responsibility for information, or errors or omissions in this e-mail or use or misuse thereof. If in doubt, please verify the authenticity with the! sender. -- http://mail.python.org/mailman/listinfo/python-list
Reading new mail from outlook
Hi,I am trying to create new tickets in the ticketing system using python. When I receive new email from a particular address, I have to trigger the python script and parse the mail in required format. The main hurdle here is, how to invoke the script on arrival of new mail? I checked the outlook settings and found that it supports only microsoft _vbscript_ and Jscript. Is there any other way? I mean, if I make a daemon, how will it be notified of new mail? Is there any python module that does this? I am not sure if this is the right place to ask this, since it is also a microsoft related question. But any help is appreciated.Thanks,SPJ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. -- http://mail.python.org/mailman/listinfo/python-list
Reading new mail from outlook using Python
Hi,I am trying to create new tickets in the ticketing system using python. When I receive new email from a particular address, I have to trigger the python script and parse the mail in required format. The main hurdle here is, how to invoke the script on arrival of new mail? I checked the outlook settings and found that it supports only microsoft _vbscript_ and Jscript. Is there any other way? I mean, if I make a daemon, how will it be notified of new mail? Is there any python module that does this? I am not sure if this is the right place to ask this, since it is also a microsoft related question. But any help is appreciated.Thanks,SPJ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. -- http://mail.python.org/mailman/listinfo/python-list
FW:Reading new mail from outlook express using Python
My previous post was not clear, hence resending this. - Hi, I am trying to create new tickets in the ticketing system using python. When I receive new email from a particular address, I have to trigger the python script and parse the mail in required format. The main hurdle here is, how to invoke the script on arrival of new mail? I checked the outlook settings and found that it supports only microsoft VB script and Jscript. Is there any other way? I mean, if I make a daemon, how will it be notified of new mail? Is there any python module that does this? I am not sure if this is the right place to ask this, since it is also a microsoft related question. But any help is appreciated. Thanks, SPJ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs -- http://mail.python.org/mailman/listinfo/python-list
Re: Reading new mail from outlook using Python
Well on a FreeBSD/Unix system you can use the .forward to pipe the incoming mail for a user to a program. Below is the contents of my .forward that invokes procmail. |/usr/local/bin/procmail -m /path/to/conf/.procmailrc So I imagine you could do something like this in a .forward. |/path/myprogram.py SPJ wrote: Hi, I am trying to create new tickets in the ticketing system using python. When I receive new email from a particular address, I have to trigger the python script and parse the mail in required format. The main hurdle here is, how to invoke the script on arrival of new mail? I checked the outlook settings and found that it supports only microsoft VB script and Jscript. Is there any other way? I mean, if I make a daemon, how will it be notified of new mail? Is there any python module that does this? I am not sure if this is the right place to ask this, since it is also a microsoft related question. But any help is appreciated. Thanks, SPJ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ%20 -- http://mail.python.org/mailman/listinfo/python-list
Re: Shortcutting the function call stack
Hi all, and thanks a lot for your answers! I'll try to explain a bit more what I'm after, and hopefully that will be clearer. In fact, what I'm trying to do is to hijack (I'm making up the term) a function: def hijacker(arg): if I_feel_its_necessary: hijack_caller_function_and_make_it_return(1) def my_function1(arg): hijacker(something) ... # Continue as normal return 2 def my_function2(arg): ... # Maybe do some processing here hijacker(whatever) ... # Continue as normal return 3 I have some long functions like my_function1 and my_function2 which I'd like to alter, but I want to keep the alterations as little as as possible. I'd like the extra behaviour to be handled by 'hijacker' and let it decide what the caller function should return. Just adding a call to 'hijacker' in all of these functions would be ideal for me because that would be quick to modify them and also easier to maintain, I believe. If 'hijacker' thinks it's necessary, it would force the caller function to return a certain value, otherwise it would let the caller function do its normal business. For while I thought I'd make hijacker a decorator: @hijacker def my_function(request): But that wouldn't work, since some functions need to do some processing before calling the hijacker. Yet, I think a decorator is systematically called before the function itself so no prior processing can be done by the function... Any idea on how to do that, if that's even possible? Thanks! Julien On Mar 25, 2:06 am, [EMAIL PROTECTED] wrote: On Mar 24, 9:48 am, Jason [EMAIL PROTECTED] wrote: On Mar 24, 5:21 am, Julien [EMAIL PROTECTED] wrote: Hello all, I would like to do something like: def called(arg) if arg==True: !!magic!!caller.return 1 def caller(arg) called(arg) return 2 Here, the fake !!!magic!!! represents a statement (which I ignore) that would make the caller function return a value different from what it'd return normally. For example, caller(True) would return 1, and caller(False) would return 2. The reason I want that is because I don't want the caller function to know what's going on in the called function, and be shortcut if the called function think it's necessary. Would you know if that's possible, and if so, how? I've done a bit of research and I think I've found some good pointers, in particular using the 'inspect' library: import inspect def called(arg) if arg==True: caller_frame = inspect.stack()[1] ... Here 'caller_frame' contains the frame of the caller function. Now, how can I make that frame return a particular value? By the way, I'm not really interested in 'called' throwing an exception and 'caller' catching it. In fact, I want things to remain completely transparent for 'caller'. Hope that was clear... :/ Thanks! Julien As Steven wrote, it's not very clear. If we knew the intent of this, we could perhaps point you to a more useful, maintainable technique. We don't know why you're trying to circumvent the programming language in this case. Any solution that works as you described will probably be unportable between the different Pythons (CPython, Jython, IronPython, etc). Please note that the following code should work, but I've only run it through the interpreter in my brain. My brain's interpreter is full of Heisenbugs, so you may need to adjust a few things. Here's my thoughts: Given: def First( arg ): Second( arg ) return 5 1) If you can modify both functions, change the first function to return a value in certain circumstances: def AltFirst( arg ): value = Second( arg ) if value is not None: return value return 5 2) Raise an exception in Second, and catch that exception above First: class SecondExcept(Exception): def __init__(self, value): Exception.__init__(self, 'Spam!') self.value = value def Second(arg): if arg == my_conditional_value: raise SecondExcept( 5 ) # The following could even be put in your own function, # or in a wrapper or decorator for the First function. try: myvalue = First( 'Vikings!' ) except SecondExcept, exc: myvalue = exc.value When you need to use an exceptional pathway, use an exception. They aren't just for reporting errors. Exceptions are a control tool. There was a 'goto using Exceptions' once in the manuals. I don't see a problem with a local control-flow object. It would appease a number of requests I've read. for x: for y: control.break( 2 ) if a: if b: control.fail( 2 ) so no need to reduplicate: else: thing() else: thing() if a: if b: control.mostrecenttest( 0 ) def f(): def g(): control.return( 2 )( early ) Something tells me generators could solve
Python 2.2.1 and select()
Hi kids! I've got some code that uses select.select() to capture all the output of a subprocess (both stdout and stderr, see below). This code works as expected on a variety of Fedora systems running Python 2.4.0, but on a Debian Sarge system running Python 2.2.1 it's a no-go. I'm thinking this is a bug in that particular version of Python, but I'd like to have confirmation if anyone can provide it. The behavior I see is this: the call to select() returns: [file corresponding to sub-proc's STDOUT] [] [] If and only if the total amount of output is greater than the specified buffer size, then reading on this file hangs indefinitely. For what it's worth, the program whose output I need to capture with this generates about 17k of output to STDERR, and about 1k of output to STDOUT, at essentially random intervals. But I also ran it with a test shell script that generates roughly the same amount of output to each file object, alternating between STDOUT and STDERR, with the same results. Yes, I'm aware that this version of Python is quite old, but I don't have a great deal of control over that (though if this is indeed a python bug, as opposed to a problem with my implementation, it might provide some leverage to get it upgraded)... Thanks in advance for any help you can provide. The code in question (quite short) follows: def capture(cmd): buffsize = 8192 inlist = [] inbuf = errbuf = io = popen2.Popen3(cmd, True, buffsize) inlist.append(io.fromchild) inlist.append(io.childerr) while True: ins, outs, excepts = select.select(inlist, [], []) for i in ins: x = i.read() if not x: inlist.remove(i) else: if i == io.fromchild: inbuf += x if i == io.childerr: errbuf += x if not inlist: break if io.wait(): raise FailedExitStatus, errbuf return (inbuf, errbuf) If anyone would like, I could also provide a shell script and a main program one could use to test this function... -- Derek D. Martin http://www.pizzashack.org/ GPG Key ID: 0x81CFE75D pgpuxR0RACuHg.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: FW:Reading new mail from outlook express using Python
On 2008-03-24, SPJ [EMAIL PROTECTED] wrote: I am trying to create new tickets in the ticketing system using python. When I receive new email from a particular address, I have to trigger the python script and parse the mail in required format. The main hurdle here is, how to invoke the script on arrival of new mail? I checked the outlook settings and found that it supports only microsoft VB script and Jscript. Is there any other way? I mean, if I make a daemon, how will it be notified of new mail? Is there any python module that does this? I am not sure if this is the right place to ask this, since it is also a microsoft related question. But any help is appreciated. You can use Outlook's COM interface from Python. That allows you to read messages from a mailbox. I don't know of any way to get notified, but you can use the COM interface to poll the mailbox(es) periodically. -- Grant -- http://mail.python.org/mailman/listinfo/python-list
Re: Need help calling a proprietary C DLL from Python
On Mar 24, 3:45 pm, Craig [EMAIL PROTECTED] wrote: On Mar 24, 12:27 pm, Craig [EMAIL PROTECTED] wrote: On Mar 23, 7:59 pm, Dennis Lee Bieber [EMAIL PROTECTED] wrote: On Sun, 23 Mar 2008 14:24:52 -0700 (PDT), Craig [EMAIL PROTECTED] declaimed the following in comp.lang.python: This dll was designed to be used from either C or Visual Basic 6. I have the declare statements for VB6, if that helps. Probably not that much -- I'd bet it's full of variant records G Based on the results I have so far (and I have tried MANY permutations like trying to use the LPSTR for SecKey and PriKey which are returned as is TypeDef), it looks like SecKey and PriKey are being used as data instead of pointers. For this, I try: LPSTR = c_char_p VmxGet.argtypes = [LPHANDLE, LPSHORT, LPSHORT, LPBSTR, LPSTR, LPBSTR, LPSTR] SrchKey = windll.oleaut32.SysAllocStringByteLen(MSD19DN \x00, 41) SecKey = create_string_buffer(41) SecKey.raw = 1234567890123456789012345678901234567890 PriKey = windll.oleaut32.SysAllocStringByteLen(ABCDEFGHIJKLMNOPQRSTUVWXYZ12345678901234\x00, 41) TypeDef = create_string_buffer(128) TypeDef.raw = X.center(128, X) res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), SecKey, byref(c_void_p(PriKey)), TypeDef ) and I get: Traceback (most recent call last): File C:\temp\vbisam_test_2.py, line 158, in module res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(S rchKey)), SecKey, byref(c_void_p(PriKey)), TypeDef ) WindowsError: exception: access violation reading 0x3433322D I notice that SecKey.raw starts with 1234 and the exception address is 0x3433322D, which is 432-. 0x2D is 4 less than the expected 0x31... And, changing to: VmxGet.argtypes = [LPHANDLE, LPSHORT, LPSHORT, LPBSTR, LPBSTR, LPSTR, LPSTR] PriKey = create_string_buffer(41) PriKey.raw = ABCDEFGHIJKLMNOPQRSTUVWXYZ12345678901234 res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), byref(c_void_p(SecKey)), PriKey, TypeDef ) I then get: Traceback (most recent call last): File C:\temp\vbisam_test_2.py, line 159, in module res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(S rchKey)), byref(c_void_p(SecKey)), PriKey, TypeDef ) WindowsError: exception: access violation reading 0x4443423D I notice that PriKey.raw starts with ABCD and the exception address is 0x4443423D, which is DBC=. ... and 0x3D is 4 less than the expected 0x41 Which leads me to suspect that BSTR are a structure, not a plain string, in which the address given is supposed to be prefaced with a length value. IOWs, something like: ||--| ^^ C-string data ||Address to be passed |(address - 4) to get to a length count field Confirmed:http://msdn2.microsoft.com/en-us/library/ms221069(VS.85).aspx (the URL is from HTTP through to the end, including .aspx) Creating such may not be difficult -- but passing it to the DLL could be. I don't know if ctypes allows pointer arithmetic. ctypes OLESTR is a c_wchar_p, but that is still a c-style string with no length prefix. The only mention of BSTR in the win32 extensions is in text that implies that the win32 extension library takes care of converting from/to BSTR and Python strings transparently -- but that won't work for your third-party library I suspect. Might have to beg the author(s) of ctypes to add a BSTR type to the list of those supported... as I can find no means of tweaking the address computed by byref() to point somewhere into a structure rather than the beginning of the structure. pk = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 12) pk 1373844 id(pk) 18941724 ctypes.string_at(pk) '1234567890' ctypes.string_at(pk-4, 20) '\x0c\x00\x00\x001234567890\x00\x01\x00\x00\x00\x00' Okay, the return value from SysAlloc... IS the integer representing the address of a BSTR structure (IE, the address four bytes in from the real memory start)... Note how backing up 4 bytes reveals the BSTR length field What happens if you just pass that item as-is, no byref(), no conversion to ctypes pointer types... PriKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) SecKey = ctypes.windll.oleaut32.SysAllocStringByteLen(1234567890, 41) res = VmxGet( byref(hwmcb), byref(SecIndex), byref(Option), byref(c_void_p(SrchKey)), SecKey, PriKey, TypeDef
Re: Paramiko bugs out on windows 2003 server
On Mar 25, 7:50 am, Tarun Kapoor [EMAIL PROTECTED] wrote: I am using the paramiko library to pull a data from a server using SFTP. It works perfect on a windows xp machine but bugs out a windows 2003 server. I get the following error: Traceback (most recent call last): File S:\Temp\ftpBOA.py, line 5, in ? import paramiko File C:\Python23\lib\paramiko\__init__.py, line 69, in ? from transport import randpool, SecurityOptions, Transport File C:\Python23\lib\paramiko\transport.py, line 32, in ? from paramiko import util File C:\Python23\lib\paramiko\util.py, line 31, in ? from paramiko.common import * File C:\Python23\lib\paramiko\common.py, line 98, in ? from osrandom import OSRandomPool File C:\Python23\lib\paramiko\osrandom.py, line 54, in ? raise ImportError(Cannot find OS entropy source) ImportError: Cannot find OS entropy source Anyone knows how to solve it ? Here's some meta-help: paramiko seems to be actively maintained and has a mailing list -- see http://www.lag.net/mailman/listinfo/paramiko -- consider asking on that list. Not only is paramiko open source but also you have the source code on your machine already -- consider looking at C:\Python23\lib\paramiko \osrandom.py and see if you can nut out what it is complaining about. Even if you can't, the experience may help you to better answer questions from the maintainer, who may well not have a Windows 2003 server box upon which to replicate the problem. -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling a shared library using C types
Hi,
I know this is a pretty simple question but I've spent a while on this and
can't see whats wrong. I'm trying to access a shared library which I've
created called Simulation.so, its created as such (snip from makefile):
all: simulation
simulation: Simulation.so
Simulation.so: Simulation.o Statistics.o
gcc -shared Simulation.o Statistics.o -L/usr/local/lib -lsbml
-lstdc++ -lm -o Simulation.so
Statistics.o: Statistics.c Statistics.h
gcc -fpic -g -O2 -I/usr/include -c Statistics.c
Simulation.o: Simulation.c
gcc -fpic -g -O2 -I/usr/include -c Simulation.c
and I can load it properly in python
import ctypes
t = ctypes.CDLL('./Simulation.so')
this works fine, I have a simple function I ve put in for testing which just
returns the integer 4. However when I try to access this function it doesnt
work
t.test()
File stdin, line 1, in module
File
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ctypes/__init__.py,
line 325, in __getattr__
func = self.__getitem__(name)
File
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ctypes/__init__.py,
line 330, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: dlsym(0x81e6b0, test): symbol not found
I've tried using
t.__getattr__(test)
but still have the same exception, I've tried loading the library with mode
= RTLD_GLOBAL aswell and still have no luck. As far I as I can see this
should work? But as I am just starting with ctypes I am sure I doing
something sorry very stupid.
Any pointers would be greatly appreciated,
Many thanks in advance,
Nathan
Im hoping python-list is ok for questions regarding ctypes :S
--
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Re: Shortcutting the function call stack
On Mar 25, 9:05 am, Julien [EMAIL PROTECTED] wrote: Hi all, and thanks a lot for your answers! I'll try to explain a bit more what I'm after, and hopefully that will be clearer. In fact, what I'm trying to do is to hijack (I'm making up the term) a function: def hijacker(arg): if I_feel_its_necessary: hijack_caller_function_and_make_it_return(1) def my_function1(arg): hijacker(something) ... # Continue as normal return 2 Your end goal (avoiding duplicate code) is laudable. However most folk manage to do this without needing to invent arcane control structures like the COME FROM and the COBOL ALTER verb. def common_code(arg): if necessary(arg): return 1 # assuming None is not a valid return from myfunc1 etc return None def myfunc1(arg): return_value = common_code(something) if return_value is not None: return return_value # continue # Look, Ma! No decorators! Those functions could be methods of classes, but IMHO you don't need anything fancier than that. You mentioned maintainability. To borrow someone else's advice: Consider that the next person to maintain your code may know where you live and may possess a chain-saw. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Shortcutting the function call stack
On Mar 24, 10:05 pm, Julien [EMAIL PROTECTED] wrote: Hi all, and thanks a lot for your answers! I'll try to explain a bit more what I'm after, and hopefully that will be clearer. In fact, what I'm trying to do is to hijack (I'm making up the term) a function: def hijacker(arg): if I_feel_its_necessary: hijack_caller_function_and_make_it_return(1) def my_function1(arg): hijacker(something) ... # Continue as normal return 2 def my_function2(arg): ... # Maybe do some processing here hijacker(whatever) ... # Continue as normal return 3 I have some long functions like my_function1 and my_function2 which I'd like to alter, but I want to keep the alterations as little as as possible. I'd like the extra behaviour to be handled by 'hijacker' and let it decide what the caller function should return. Just adding a call to 'hijacker' in all of these functions would be ideal for me because that would be quick to modify them and also easier to maintain, I believe. If 'hijacker' thinks it's necessary, it would force the caller function to return a certain value, otherwise it would let the caller function do its normal business. For while I thought I'd make hijacker a decorator: @hijacker def my_function(request): But that wouldn't work, since some functions need to do some processing before calling the hijacker. Yet, I think a decorator is systematically called before the function itself so no prior processing can be done by the function... Any idea on how to do that, if that's even possible? Of course it's possible ;), with the combination of an exception and a decorator. See example below. However I would seriously doubt the maintainability of such practices... # - hijack.py from functools import wraps class HijackReturn(Exception): def __init__(self, val): self.val = val def hijack(f): @wraps(f) def hijacked(*args, **kwargs): try: return f(*args, **kwargs) except HijackReturn, e: return e.val return hijacked @hijack def foo(x): x = x + 1 hijacker(x) return x * 2 def hijacker(x): if x == 21: print [Oh no, it's going to be 42!] raise HijackReturn(41) # --- marigold:junk arno$ python -i hijack.py foo(10) 22 foo(20) [Oh no, it's going to be 42!] 41 HTH -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
Beautiful Soup Looping Extraction Question
Hello All,
I have a Beautiful Soup question and I'd appreciate any guidance the
forum can provide.
Let's say I have a file that looks at file.html pasted below.
My goal is to extract all elements where the following is true: p
align=left and div align=center.
The lines should be ordered in the same order as they appear in the
file - therefore the output file would look like output.txt below.
I experimented with something similar to this code:
for i in soup.findAll('p', align=left):
print i
for i in soup.findAll('p', align=center):
print i
I get something like this:
p align=leftP4/p
p align=leftP3/p
p align=leftP1/p
div align=centerdiv4b/div
div align=centerdiv3b/div
div align=centerdiv2b/div
div align=centerdiv2a/div
Any guidance would be greatly appreciated.
Best,
Ira
##begin: file.html
html
body
p align=leftP1/p
p align=rightP2/p
div align=centerdiv2a/div
div align=centerdiv2b/div
p align=leftP3/p
div align=rightdiv3a/div
div align=centerdiv3b/div
div align=leftdiv3c/div
p align=leftP4/p
div align=leftdiv4a/div
div align=centerdiv4b/div
/body
/html
##end: file.html
===begin: output.txt===
p align=leftP1/p
div align=centerdiv2a/div
div align=centerdiv2b/div
p align=leftP3/p
div align=centerdiv3b/div
p align=leftP4/p
div align=centerdiv4b/div
===end: output.txt===
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Re: urllib leaves connections/sockets waiting. BIG problem!!!
On Mar 24, 6:57 am, binaryj [EMAIL PROTECTED] wrote: hi i am using urllib2 to do some automated web thing. basically i hit on sites and check the price what they are offering for their product and then decide if i want to lower or increase my pricing.so in short i have to hit hundreds of sites! for the problem: = i run 20 threads all do the same stuff. (hit and run :) ) after around 10-15 hits(per thread) hits the thread does nothing. it freezes. slowely but STEADILY all the threads end up with the same fate :( i did some netstat and found out that the connecton(sockets) the program had opened are waiting the CLOSE_WAIT state !! netstat -t tcp 1 0 192.168.1.2:4882 host-blabla:www CLOSE_WAIT tcp 1 0 192.168.1.2:4884 host-blabla:www CLOSE_WAIT tcp 1 0 192.168.1.2:4375 host-blabla:www CLOSE_WAIT OUTPUT OF PROGRAM: THREAD: #Thread-2 getting price from webi-d 7511975 DONE !!! THREAD: #Thread-1 getting price from webi-d 4449152 DONE !!! THREAD: #Thread-2 getting price from webi-d 7466091 DONE !!! THREAD: #Thread-1 getting price from webi-d 8641914 DONE !!! THREAD: #Thread-2 getting price from webi-d 7745289 DONE !!! THREAD: #Thread-1 getting price from webi-d 6032442 DONE !!! THREAD: #Thread-2 getting price from webi-d 8149873 DONE !!! no-price-on-page error THREAD: #Thread-1 getting price from webi-d 5842934 DONE !!! no-price-on-page error THREAD: #Thread-2 getting price from webi-d 3385778 DONE !!! THREAD: #Thread-1 getting price from webi-d 4610122 DONE !!! THREAD: #Thread-2 getting price from webi-d 8641536 DONE !!! THREAD: #Thread-1 getting price from webi-d 4219935 DONE !!! -and thats it, it freezes. i have waited 1hr the sockets have not changed their states! :( please help :) I think we'll need more details before being able to assess what is wrong. Can you supply some sample code that has the same bug? -- http://mail.python.org/mailman/listinfo/python-list
Re: Serving another web site which requires authentication
Hi binaryj, Yeah I feel lucky, thanks... Well, actually, I want my users to be able to see the auction information about some vehicles. It's a Japanese site (https://www.iauc.co.jp/) I've no experience about the proxy staff, but when I googled I found; - Twisted - pyCurl but, I don't know how to all the proxy thing... especially, serving the password protected area of the site.. hoping to feel lucky again :) On 24 Mart, 23:01, binaryj [EMAIL PROTECTED] wrote: ur in luck i am an expert at this! tell me the details , site name etc you would have to proxy everything, basically the urls in the copied page have to be changed to point to ur site. its highly possible. a minor adjustment to ur urlconf and it will work. -- http://mail.python.org/mailman/listinfo/python-list
PyGTK localisation on Win32
I've built an app on linux which we have managed to localise into at least three languages, the app runs well using this command LANG=fr_FR python app.py which would translate the app into french. We've tried the replicate the same principle on windows but so far nothing works, the app will need to be translated into other languages that have no locale, in windows is there a way to have Glade load values from a textfile instead of trying to use the .mo files? -- http://mail.python.org/mailman/listinfo/python-list
Re: Beautiful Soup Looping Extraction Question
On Mar 24, 6:32 pm, Tess [EMAIL PROTECTED] wrote: Hello All, I have a Beautiful Soup question and I'd appreciate any guidance the forum can provide. I *know* you're using Beautiful Soup, and I *know* that BS is the de facto HTML parser/processor library. Buut, I just couldn't help myself in trying a pyparsing scanning approach to your problem. See the program below for a pyparsing treatment of your question. -- Paul My goal is to extract all elements where the following is true: p align=left and div align=center. from pyparsing import makeHTMLTags, withAttribute, keepOriginalText, SkipTo p,pEnd = makeHTMLTags(P) p.setParseAction( withAttribute(align=left) ) div,divEnd = makeHTMLTags(DIV) div.setParseAction( withAttribute(align=center) ) # basic scanner for matching either p or div with desired attrib value patt = ( p + SkipTo(pEnd) + pEnd ) | ( div + SkipTo(divEnd) + divEnd ) patt.setParseAction( keepOriginalText ) print \nBasic scanning for match in patt.searchString(html): print match[0] # simplified data access, by adding some results names patt = ( p + SkipTo(pEnd)(body) + pEnd )(P) | \ ( div + SkipTo(divEnd)(body) + divEnd )(DIV) patt.setParseAction( keepOriginalText ) print \nSimplified field access using results names for match in patt.searchString(html): if match.P: print P -, match.body if match.DIV: print DIV -, match.body Prints: Basic scanning p align=leftP1/p div align=centerdiv2a/div div align=centerdiv2b/div p align=leftP3/p div align=centerdiv3b/div p align=leftP4/p div align=centerdiv4b/div Simplified field access using results names P - P1 DIV - div2a DIV - div2b P - P3 DIV - div3b P - P4 DIV - div4b -- http://mail.python.org/mailman/listinfo/python-list
Re: Why I hate lambdas (Re: Do any of you recommend Python as afirst programming language?)
Arnaud Delobelle [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] From what I remember when I looked at the source: stack frames execute code objects, not functions. They don't know what function has spawned them, only what code object they are executing. In fact when one thinks of it, it makes more sense for code objects to have a name (taken from the def statement) than for function objects, as there is exactly one code object for every def statement. This is what I tried to say before. Function objects have the attributes needed to call the code. Code objects have attributes needed to execute the code. Both have a name for str() and repr(). tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: New to group
On Mar 24, 12:18 pm, George Sakkis [EMAIL PROTECTED] wrote: On Mar 24, 3:13 pm, pythonnubie [EMAIL PROTECTED] wrote: i have come across my first exeption using randrange . The exeption is no such attribute in module random platform is xp home and the python build is activestate 2.5 Welcome aboard! There's definitely a randrange function in the random module, so something else must be wrong. To get the most out of this list and minimize wasted bandwidth, the most effective way usually consists of copying and pasting: 1. The offending code (or just the relevant part if it's too big). 2. The full traceback of the raised exception. Regards, George Hwere is the complete traceback ! The word is: index Traceback (most recent call last): File F:\Python25\Lib\site-packages\pythonwin\pywin\framework \scriptutils.py, line 307, in RunScript debugger.run(codeObject, __main__.__dict__, start_stepping=0) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \__init__.py, line 60, in run _GetCurrentDebugger().run(cmd, globals,locals, start_stepping) File F:\Python25\Lib\site-packages\pythonwin\pywin\debugger \debugger.py, line 631, in run exec cmd in globals, locals File F:\Documents and Settings\Mark\My Documents\rand.py, line 5, in module import random File F:\Documents and Settings\Mark\My Documents\random.py, line 13, in module distributions on the real line: AttributeError: 'module' object has no attribute 'randrange' Why would it say it can't find the function ? Because you named your file 'random.py' and it shadows the standard random module! Change the name to something else, say foo.py, and try it again. George- Hide quoted text - - Show quoted text - Hi that was the problem I shoaswoed the random module . Thanks to everyone for their support ! Mark -- http://mail.python.org/mailman/listinfo/python-list
