Re: Abelson and Python
markscottwright wrote: If it were that easy, the PyPy guys would be done by now. if the PyPy guys had focused on writing a Python interpreter in Python, they'd been done by now. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: utf - string translation
Klaas wrote: It's not too hard to imagine an accentual difference, eg: especially in languages where certain combinations really are distinct letters, not just letters with accents or silly marks. I have a Swedish children's book somewhere, in which some characters are harassed by a big ugly monster who carries a sign around his neck that says Monster. the protagonist ends up adding two dots to that sign, turning it into Mönster (meaning model, in the model citizen sense), and all ends well. just imagine that story in reverse. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: utf - string translation
On Wed, 22 Nov 2006 22:59:01 +0100, John Machin [EMAIL PROTECTED] wrote: [snip] So why do you want to strip off accents? The history of communication has several examples of significant difference in meaning caused by minute differences in punctuation or accents including one of which you may have heard: a will that could be read (in part) as either a chacun d'eux million francs or a chacun deux million francs with the remainder to a 3rd party. It may not be to store or even use the actual text. I stumbled on a problem like this some time ago: I had some code building an index for a document and wanted the entries starting with e, é, è or ê to be in the same section... -- python -c print ''.join([chr(154 - ord(c)) for c in 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-']) -- http://mail.python.org/mailman/listinfo/python-list
How do I find possible matches using regular expression?
Hi there, I'm trying to do some predicting work over user input, here's my question: for pattern r'match me', the string 'no' will definitely fail to match, but 'ma' still has a chance if user keep on inputting characters after 'ma', so how do I mark 'ma' as a possible match string? Thanks a lot, Andy -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
Andy [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi there, I'm trying to do some predicting work over user input, here's my question: for pattern r'match me', the string 'no' will definitely fail to match, but 'ma' still has a chance if user keep on inputting characters after 'ma', so how do I mark 'ma' as a possible match string? Thanks a lot, Andy Maybe .startsWith might be more useful than re.match, since you are predicting user input based on characters that have been typed so far. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: The Python Papers Edition One
I've recently tried the docutils's reST module with Pygments ( to highlight Python sources), so you can have LaTeX + HTML + PDF output (You can see what it renders here : h**p://kib2.free.fr/geoPyX/geoPyX.html ). It worked fine, but needs a little work to suit your needs (you'll have to write your own CSS, and maybe your LaTeX preambule ). For OpenOffice, a friend wrote a little Python script that colourize a Python source inside a document. I think It will be possible to write your own for HTML output, but the ooo API docs aren't well documented for Python. Chears, 6Tool9 -- http://mail.python.org/mailman/listinfo/python-list
Finding the carret position in a regular expression
Hi, supposed I've got the following text : mytext = for myvar in somelist: with the following simple pattern : pattern = [a-z]+ I use re.findall(pattern, mytext) wich returns : ['myvar','somelist'] Now, I want my prog to return the positions of the returned list elements, ie : myvar was found at position 5 in mytext somelist was found at position 16 in mytext How can I implement this ? Sorry if it's trivial, that's the first time I use regular expressions. Thanks, 6Tool9 -- http://mail.python.org/mailman/listinfo/python-list
Using SimpleXMLRPCServer in a Windows Service
After some Googling I found a post of someone who wanted to do exactly as what I want to do now. There is however a problem in his code that makes the service fails after the first connection. I slightly modified his code and now I can run the service longer before I run into trouble. I then tried making the SimpleXMLRPCServer multi-threaded, hoping the problem would disappear, but no avail. The code is as follows: The commented part in the while loop is from the original code. CODE ## XML-RPC Service import sys import win32serviceutil import win32service import win32event import win32evtlogutil import win32file import servicemanager import SimpleXMLRPCServer import SocketServer import select class OBJECT: def hello(self, text): return Hello World (%s) % text class ThreadedSimpleXMLRPCServer(SocketServer.ThreadingMixIn, SimpleXMLRPCServer.SimpleXMLRPCServer): pass class XMLRPCSERVICE(win32serviceutil.ServiceFramework): _svc_name_ = XMLRPCSERVICE _svc_display_name_ = XMLRPCSERVICE _svc_description_ = XMLRPCSERVICE def __init__(self, args): win32evtlogutil.AddSourceToRegistry(self._svc_display_name_, sys.executable, Application) win32serviceutil.ServiceFramework.__init__(self, args) self.hWaitStop = win32event.CreateEvent(None, 0, 0, None) self.hSockEvent = win32event.CreateEvent(None, 0, 0, None) self.stop_requested = 0 def SvcStop(self): self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING) self.stop_requested = 1 win32event.SetEvent(self.hWaitStop) def SvcDoRun(self): ## Write a started event servicemanager.LogMsg( servicemanager.EVENTLOG_INFORMATION_TYPE, servicemanager.PYS_SERVICE_STARTED, (self._svc_name_, ' (%s)' % self._svc_name_)) server = ThreadedSimpleXMLRPCServer((, 8080)) object = OBJECT() server.register_instance(object) self.socket = server.socket while 1: r, w, x = select.select([self.socket],[],[],10) if r == [self.socket]: server.handle_request() if self.stop_requested: self.socket.close() break #win32file.WSAEventSelect(server, self.hSockEvent,win32file.FD_ACCEPT) #rc = win32event.WaitForMultipleObjects((self.hWaitStop,self.hSockEvent), 0, win32event.INFINITE) #if rc == win32event.WAIT_OBJECT_0: #break #else: #server.handle_request() #win32file.WSAEventSelect(server,self.hSockEvent, 0) ##server.serve_forever() ## Works, but breaks the ## Write a stopped event win32evtlogutil.ReportEvent(self._svc_name_, servicemanager.PYS_SERVICE_STOPPED,0, servicemanager.EVENTLOG_INFORMATION_TYPE, (self._svc_name_,)) if __name__ == '__main__': win32serviceutil.HandleCommandLine(XMLRPCSERVICE) /CODE I tested with the following: CODE import xmlrpclib import time server = xmlrpclib.ServerProxy(http://localhost:8080;) for i in range(100): print server.hello(%d % i) time.sleep(1) /CODE The loop ends with the following error: OUTPUT Hello World (0) ... Hello World (44) Traceback (most recent call last): File C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py, line 310, in RunScript exec codeObject in __main__.__dict__ File C:\DATA\TestSoap.py, line 6, in ? print server.hello(%d % i) File C:\Python24\lib\xmlrpclib.py, line 1096, in __call__ return self.__send(self.__name, args) File C:\Python24\lib\xmlrpclib.py, line 1383, in __request verbose=self.__verbose File C:\Python24\lib\xmlrpclib.py, line 1137, in request headers ProtocolError: ProtocolError for localhost:8080/RPC2: -1 /OUTPUT Can someone help me in creating a windows service that allows me to handle XMLRPC request? Thanks in advance, Rudy Schockaert -- http://mail.python.org/mailman/listinfo/python-list
psyco-simplified idioms ?
I am curious about idioms instinctively avoided by experienced programmers because of inefficiencies that psyco eliminates. IOW, are there any identifiable ways in which the backing of psyco promotes simpler code by eliminating efficiency concerns ? Best, BB -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the carret position in a regular expression
Tool69 wrote: supposed I've got the following text : mytext = for myvar in somelist: with the following simple pattern : pattern = [a-z]+ I use re.findall(pattern, mytext) wich returns : ['myvar','somelist'] Now, I want my prog to return the positions of the returned list elements, ie : myvar was found at position 5 in mytext somelist was found at position 16 in mytext findall doesn't return that information; use finditer instead, and use the span or start method on the returned match object to get the position: for m in re.finditer(pattern, mytext): print m.span() /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
The problem is the input will be much more complex than the example, it could be something like 30 minutes later where any string starting with a number is a possible match. Paul McGuire 寫道： Andy [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi there, I'm trying to do some predicting work over user input, here's my question: for pattern r'match me', the string 'no' will definitely fail to match, but 'ma' still has a chance if user keep on inputting characters after 'ma', so how do I mark 'ma' as a possible match string? Thanks a lot, Andy Maybe .startsWith might be more useful than re.match, since you are predicting user input based on characters that have been typed so far. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding the carret position in a regular expression
Thanks Fredrik, I was not aware of finditer. Iterators are very usefull ! -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
Andy wrote: The problem is the input will be much more complex than the example, it could be something like 30 minutes later where any string starting with a number is a possible match. so if I type 1, are you going to suggest all possible numbers that start with that digit? doesn't strike me as very practical. maybe you could post a more detailed example, where you clearly explain what a pattern is and how it is defined, what prediction means, and what you want to happen as new input arrives, so we don't have to guess? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
Andy wrote: Hi there, I'm trying to do some predicting work over user input, here's my question: for pattern r'match me', the string 'no' will definitely fail to match, but 'ma' still has a chance if user keep on inputting characters after 'ma', so how do I mark 'ma' as a possible match string? The answer is: Using regular expressions doesn't seem like a good idea. If you want to match against only one target, then target.startswith(user_input) is, as already mentioned, just fine. However if you have multiple targets, like a list of computer-language keywords, or the similar problem of an IME for a language like Chinese, then you can set up a prefix-tree dictionary so that you can search the multiple target keywords in parallel. All you need to do is keep a finger pointed at the node you have reached along the path; after each input character, either the finger gets pointed at the next relevant node (if the input character is valid) or you return/raise a failure indication. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: X class missing in Python :-) - Re: What's going on here?
John Machin wrote:
robert wrote:
Dale Strickland-Clark wrote:
Python 2.4.2 (#1, Oct 13 2006, 17:11:24)
[GCC 4.1.0 (SUSE Linux)] on linux2
Type help, copyright, credits or license for more information.
a = object()
a
object object at 0xb7bbd438
a.spam = 1
Traceback (most recent call last):
File stdin, line 1, in ?
AttributeError: 'object' object has no attribute 'spam'
class b(object):
...pass
...
a = b()
a
__main__.b object at 0xb7b4dcac
a.spam = 1
What is subclassing adding to the class here? Why can't I assign to
attributes of an instance of object?
Python so dynamic, but it lacks a (builtin) X-class ready for ad-hoc
usage just like dict() :-)
I have in almost every app/toolcore-module this one:
--
class X(object):
def __init__(self,_d={},**kwargs):
kwargs.update(_d)
self.__dict__=kwargs
class Y(X):
def __repr__(self):
return 'Y:%s'%self.__dict__
--
x=X(spam=1)
Maybe X should be renamed to __builtin__.Object ...
Have you considered putting it in one file and *importing* it into
almost every app/toolcore-module?
(yes its in my core python language extension module, which I import
frequently in apps)
Have you considered that others may like to have something a little
more elaborate, like maybe using the pprint module, or that the amount
of data that would spew out might in some cases be so great that they
wouldn't want that every time from repr(), preferring a dump-style
method that wrote to a logfile?
(in X is no repr so far. of course one could make a default repr with short
output. had no frequent needs so far)
IMHO that's one of the enormous number of good points about Python; you
can easily lash up something like that to suit yourself and inject it
into any class you like; there's no central authority tying your hands
behind your back.
its more about the general case, trying things out on the interactive etc.
always - thus when I want speed not suit :-)
very often I need a dummy object and find me always typing class X:pass or
import above tools.
Think this trivial but needed Object() thing is possibly more than a private
sitecustomize-thing. Thats why I wrote here upon seeing others trying object()
which doesn't do what one expects at first.
It wouldn't really tie hands or ? but possibly converse
Robert
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sys.stderr.write and sys.exit
Is the same use _sys.stderr.write('error message'); sys.exit(1)_ than
_sys.exit('error message')_ ?
Note: help(sys.exit)
If the status is omitted or None, it defaults to zero (i.e., success).
If the status is numeric, it will be used as the system exit status.
If it is another kind of object, it will be printed and the system exit
status will be one (i.e., failure).
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len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Hi, (len(['']) is 1) == (len(['']) == 1) = True Is this the case for all numbers? I've tried running the following: for i in range(1): for j in range(1): if i != j: assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id (i)) which executes fine. Hence, 0- is okey... But this is a relatively small range, and sooner or later you probably get two numbers with the same id... Thoughts anyone? Regards Tor Erik PS: For those of you who don't know: keyword is compares object identities -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Tor Erik Soenvisen wrote:
(len(['']) is 1) == (len(['']) == 1) = True
Is this the case for all numbers?
I'm not sure what you're asking here, but if you digest the following
facts, maybe you can answer it yourself:
1) all objects that exist at the same time have distinct identifies, and
2) a Python implementation may or may not hand reuse existing immutable
objects that have the same value when asked to create a new object,
3) identities are recycled when objects are deleted, and
4) [] and {} always create a new object every time they're evaluated.
/F
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How do I separate my parameters with spawnv
Hi, I have a command line that works fine when I execute it directly: c:\\curl.exe -T c:\\upload.txt -u login:pwd ftp://ftp-myurl --ftp-ssl But when I try to use os.spawnv to excute it from my python code, it doesn't work at all. Here is my code: exe = c:\\curl.exe f = c:\\upload.txt logon = login:pwd url = ftp://ftp-myurl; import os os.spawnv(os.P_WAIT, exe, [-T, f, -u, logon, url, --ftp-ssl]) Does anyone know How I can execute my command line in python? Thanks and best regards, Fabio -- Ceci est une signature automatique de MesNews. Site : http://www.mesnews.net -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
Andy wrote: I'm trying to do some predicting work over user input, here's my question: for pattern r'match me', the string 'no' will definitely fail to match, but 'ma' still has a chance if user keep on inputting characters after 'ma', so how do I mark 'ma' as a possible match string? The following may or may not work in the real world: import re def parts(regex, flags=0): candidates = [] for stop in reversed(range(1, len(regex)+1)): partial = regex[:stop] try: r = re.compile(partial + $, flags) except re.error: pass else: candidates.append(r) candidates.reverse() return candidates if __name__ == __main__: candidates = parts(r[a-z]+\s*=\s*\d+, re.IGNORECASE) def check(*args): s = var.get() for c in candidates: m = c.match(s) if m: entry.configure(foreground=#008000) break else: entry.configure(foreground=red) import Tkinter as tk root = tk.Tk() var = tk.StringVar() var.trace_variable(w, check) entry = tk.Entry(textvariable=var) entry.pack() root.mainloop() The example lets you write an assignment of a numerical value, e. g meaning = 42 and colours the text in green or red for legal/illegal entries. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: PyQt app in seperate thread
anders wrote: OK I see that now. Thanks for pointing that out. So basically, I can't do what I want at all. That's a bit of a pain. Is there no way of tricking Qt into thinking I'm running it in the main thread? I have an app which runs Qt in a separate thread and allows the user to send it python commands from the main thread. Have a look at this code to see how it works: http://svn.gna.org/viewcvs/veusz/branches/qt4/embed.py?rev=530view=markup Jeremy -- Jeremy Sanders http://www.jeremysanders.net/ -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Tor Erik Soenvisen wrote: (len(['']) is 1) == (len(['']) == 1) = True Is this the case for all numbers? I've tried running the following: for i in range(1): for j in range(1): if i != j: assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, (i)) Shouldn't the test in the loop be if i == j: assert i is j Of course it would fail... Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
distinct identifies don't trust your spellchucker. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I separate my parameters with spawnv
Fabio Chelly wrote: But when I try to use os.spawnv to excute it from my python code, it doesn't work at all. Here is my code: exe = c:\\curl.exe f = c:\\upload.txt logon = login:pwd url = ftp://ftp-myurl; import os os.spawnv(os.P_WAIT, exe, [-T, f, -u, logon, url, --ftp-ssl]) iirc, spawnv expects an argv-style list, with the program name as the first argument. try writing the above as os.spawnv(os.P_WAIT, exe, [exe, -T, f, -u, logon, url, --ftp-ssl]) Does anyone know How I can execute my command line in python? the subprocess module is usually much nicer for things like this. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Tor Erik Soenvisen [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] which executes fine. Hence, 0- is okey... But this is a relatively small range, and sooner or later you probably get two numbers with the same id... Thoughts anyone? I think you are confusing yourself unnecessarily. The obvious way to implement unique ids is to return the address of the object. It's very unlikely that two different objects share the same address. -- http://mail.python.org/mailman/listinfo/python-list
10, 20, 30 to [10, 20, 30]
Sorry, how can i convert a string like 10, 20, 30 to a list [10, 20, 30] what i can do is: s = 10, 20, 30 tmp = '[' + s + ']' l = eval(tmp) but in my opinion this is not a nice solution daniel -- http://mail.python.org/mailman/listinfo/python-list
Re: 10, 20, 30 to [10, 20, 30]
On 23 Nov 2006 03:13:10 -0800, Daniel Austria [EMAIL PROTECTED] wrote:
Sorry,
how can i convert a string like 10, 20, 30 to a list [10, 20, 30]
what i can do is:
s = 10, 20, 30
tmp = '[' + s + ']'
l = eval(tmp)
but in my opinion this is not a nice solution
Not nice, especially if you can't control what is in s :)
A simple solution if you know s will always contain string
representations of integers is:
s = 10, 20, 30
[int(x) for x in s.split(',')]
[10, 20, 30]
Otherwise a good starting point might be:
for i in s.split(','):
HTH :)
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Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
On Thu, 23 Nov 2006 10:48:32 +, Tor Erik Soenvisen wrote:
Hi,
(len(['']) is 1) == (len(['']) == 1) = True
You shouldn't rely on this behaviour:
x = 10
len('a' * x) == x
True
len('a' * x) is x
False
(Your results may vary -- this depends on the implementation.)
Is this the case for all numbers? I've tried running the following:
for i in range(1):
for j in range(1):
if i != j:
assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id
(i))
which executes fine. Hence, 0- is okey...
This doesn't necessarily hold for all integers -- again, it depends on the
implementation, the precise version of Python, and other factors. Don't
rely on is giving the same results as ==.
(1+2+3+4+5)**7 == 15**7
True
(1+2+3+4+5)**7 is 15**7
False
But this is a relatively
small range, and sooner or later you probably get two numbers with the same
id... Thoughts anyone?
No, you will never get two objects existing at the same time with the same
id. You will get two objects that exist at different times with the same
id, since ids may be reused when the object is deleted.
PS: For those of you who don't know: keyword is compares object identities
Exactly. There is no guarantee that any specific integer object 1 must
be the same object as another integer object 1. It may be, but it isn't
guaranteed.
I think the only object that is guaranteed to hold for is None. None is a
singleton, so there is only ever one instance. Hence, you should test for
None with obj is None rather than ==, because some custom classes may do
silly things with __eq__:
class Blank(object):
Compares equal to anything false, including None.
def __eq__(self, other):
return not other
--
Steven.
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Re: 10, 20, 30 to [10, 20, 30]
Daniel Austria a écrit :
Sorry,
how can i convert a string like 10, 20, 30 to a list [10, 20, 30]
what i can do is:
s = 10, 20, 30
tmp = '[' + s + ']'
l = eval(tmp)
but in my opinion this is not a nice solution
daniel
If you're sure that there's only ints
l = [int(item) for item in s.split(', ')]
Yannick
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Re: 10, 20, 30 to [10, 20, 30]
On Thu, 23 Nov 2006 03:13:10 -0800, Daniel Austria wrote:
Sorry,
how can i convert a string like 10, 20, 30 to a list [10, 20, 30]
what i can do is:
s = 10, 20, 30
tmp = '[' + s + ']'
l = eval(tmp)
but in my opinion this is not a nice solution
It is a dangerous solution if your data is coming from an untrusted source.
s = 10, 20, 30
L = [x.strip() for x in s.split(',')]
L
['10', '20', '30']
L = [int(x) for x in L]
L
[10, 20, 30]
Or, as a one liner: [int(x.strip()) for x in s.split(',')]
--
Steven.
--
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Re: 10, 20, 30 to [10, 20, 30]
Daniel Austria wrote:
Sorry,
how can i convert a string like 10, 20, 30 to a list [10, 20, 30]
what i can do is:
s = 10, 20, 30
tmp = '[' + s + ']'
l = eval(tmp)
but in my opinion this is not a nice solution
Most people share your opinion. Try this:
| strg = 10, 20, 30
| [int(x) for x in strg.split(',')]
| [10, 20, 30]
Cheers,
John
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Re: Abelson and Python
Fredrik Lundh wrote: markscottwright wrote: If it were that easy, the PyPy guys would be done by now. if the PyPy guys had focused on writing a Python interpreter in Python, they'd been done by now. /F Isn't that the point of PyPy? It's what their mission statement says (http://codespeak.net/pypy/dist/pypy/doc/architecture.html#mission-statement): PyPy is an implementation of the Python programming language written in Python itself, flexible and easy to experiment with. This is something that is amazingly easy to do in scheme, since the language is so simple, but is typically pretty difficult to do in other languages. I remember being blown away by how much I knew after reaching the end of SICP - I wanted to go out and write my own scheme compiler (and given the proliferation of scheme implementations, a lot of other people must have felt the same way). I don't remember getting to the end of a book on python and thinking, that's easy. I could do that! That said, I see now that the course we're talking about isn't the same as the old 6.001 course, and presumably has different pedagogical goals. -- http://mail.python.org/mailman/listinfo/python-list
Re: 10, 20, 30 to [10, 20, 30]
On 23/11/06, Steven D'Aprano [EMAIL PROTECTED] wrote:
On Thu, 23 Nov 2006 03:13:10 -0800, Daniel Austria wrote:
Sorry,
how can i convert a string like 10, 20, 30 to a list [10, 20, 30]
what i can do is:
s = 10, 20, 30
tmp = '[' + s + ']'
l = eval(tmp)
but in my opinion this is not a nice solution
It is a dangerous solution if your data is coming from an untrusted source.
s = 10, 20, 30
L = [x.strip() for x in s.split(',')]
L
['10', '20', '30']
L = [int(x) for x in L]
L
[10, 20, 30]
Or, as a one liner: [int(x.strip()) for x in s.split(',')]
You don't need the strip()
int('10 ')
10
:)
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Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Steven D'Aprano [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
On Thu, 23 Nov 2006 10:48:32 +, Tor Erik Soenvisen wrote:
Hi,
(len(['']) is 1) == (len(['']) == 1) = True
You shouldn't rely on this behaviour:
x = 10
len('a' * x) == x
True
len('a' * x) is x
False
(Your results may vary -- this depends on the implementation.)
Is this the case for all numbers? I've tried running the following:
for i in range(1):
for j in range(1):
if i != j:
assert id(i) != id(j), 'i=%d, j=%d, id=%d' % (i, j, id
(i))
which executes fine. Hence, 0- is okey...
This doesn't necessarily hold for all integers -- again, it depends on
the implementation, the precise version of Python, and other factors.
Don't rely on is giving the same results as ==.
(1+2+3+4+5)**7 == 15**7
True
(1+2+3+4+5)**7 is 15**7
False
But this is a relatively
small range, and sooner or later you probably get two numbers with
the same id... Thoughts anyone?
No, you will never get two objects existing at the same time with the
same id. You will get two objects that exist at different times with
the same id, since ids may be reused when the object is deleted.
PS: For those of you who don't know: keyword is compares object
identities
Exactly. There is no guarantee that any specific integer object 1
must be the same object as another integer object 1. It may be, but
it isn't guaranteed.
I think the only object that is guaranteed to hold for is None. None
is a singleton, so there is only ever one instance. Hence, you should
test for None with obj is None rather than ==, because some custom
classes may do silly things with __eq__:
class Blank(object):
Compares equal to anything false, including None.
def __eq__(self, other):
return not other
I've seen code like this:
if type([]) is list:
print 'Is list'
which seem to work. And also I've seen var is None, as you mention.
--
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Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Steven D'Aprano wrote: No, you will never get two objects existing at the same time with the same id. You will get two objects that exist at different times with the same id, since ids may be reused when the object is deleted. I think it is worth pointing out that this is an area where people get confused quite often; it is very easily to get misleading results when you call the id() function. e.g. class C: def f(self): pass def g(self): pass c = C() id(c.f)==id(c.g) True c.f is c.g False The ids are the same here only because the objects do not exist at the same time. In the first comparison c.f is an expression which creates a temporary object that is destroyed before the expression involving c.g is evaluated, so it is possible for the different objects to have the same id. In the second comparison the objects exist at the same time so they are forced to have different ids. -- http://mail.python.org/mailman/listinfo/python-list
socket.error connection refused
Hi, I'm not sure this is the proper forum but I try nevertheless. The problem I'am facing is that the socket library always fail to connect to an URL. The net effect is that I can not use setuptools. I'm using Python2.4 on a windows XPPRO Sp2 machine. The firewall is disabled. There is no NLTM proxy. I connect to the internet through a NAT server (and it works). Other than with easy_install I tried to connect to a number of external urls (all of them running) and even to localhost, directly in script using urllib and the error is always the same errno: 10061 connection refused. Any ideas? -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Tor Erik Soenvisen [EMAIL PROTECTED] wrote: I've seen code like this: if type([]) is list: print 'Is list' which seem to work. 'seem to work' is correct. Occasionally 'type(x) is list' is exactly what is needed, but much more likely it is a potential bug. It is more likely that what was intended was: isinstance(x, list) It is even more likely that the intention was that the object should have some list-like behaviour, in which case not doing a test at all is the correct behaviour; or quite often that the object should be list-like but not a string in which case testing the type against basestring would be correct. e.g.: if isinstance(x, basestring): x = [x] # ... now just assume x is a suitable sequence ... for element in x: ... -- http://mail.python.org/mailman/listinfo/python-list
Re: socket.error connection refused
On 23 Nov 2006 04:09:18 -0800, Vania [EMAIL PROTECTED] wrote: Hi, I'm not sure this is the proper forum but I try nevertheless. The problem I'am facing is that the socket library always fail to connect to an URL. The net effect is that I can not use setuptools. I'm using Python2.4 on a windows XPPRO Sp2 machine. The firewall is disabled. There is no NLTM proxy. I connect to the internet through a NAT server (and it works). Other than with easy_install I tried to connect to a number of external urls (all of them running) and even to localhost, directly in script using urllib and the error is always the same errno: 10061 connection refused. Any ideas? A socket can't connect to a URL, a URL is an absolute location of an internet resource, eg hostname + (virtual) location on a server + page name. A socket can connect to an IP address or hostname - which is the first part of the URL after the http://; (or ftp:// etc) You need to post a code snippet and the errors you are getting. -- http://mail.python.org/mailman/listinfo/python-list
Re: socket.error connection refused
Hi, the reason I mentioned the socket is because that is where the error eventually occurs. the code I tried manually (with different urls including a local one) is the following: import urllib fo=urllib.urlopen(http://www.google.com;) the error I get is: File stdin, line 1, in ? File C:\Python24\lib\urllib.py, line 82, in urlopen return opener.open(url) File C:\Python24\lib\urllib.py, line 190, in open return getattr(self, name)(url) File C:\Python24\lib\urllib.py, line 313, in open_http h.endheaders() File C:\Python24\lib\httplib.py, line 798, in endheaders self._send_output() File C:\Python24\lib\httplib.py, line 679, in _send_outp self.send(msg) File C:\Python24\lib\httplib.py, line 646, in send self.connect() File C:\Python24\lib\httplib.py, line 630, in connect raise socket.error, msg IOError: [Errno socket error] (10061, 'Connection refused') Tim Williams ha scritto: On 23 Nov 2006 04:09:18 -0800, Vania [EMAIL PROTECTED] wrote: Hi, I'm not sure this is the proper forum but I try nevertheless. The problem I'am facing is that the socket library always fail to connect to an URL. The net effect is that I can not use setuptools. I'm using Python2.4 on a windows XPPRO Sp2 machine. The firewall is disabled. There is no NLTM proxy. I connect to the internet through a NAT server (and it works). Other than with easy_install I tried to connect to a number of external urls (all of them running) and even to localhost, directly in script using urllib and the error is always the same errno: 10061 connection refused. Any ideas? A socket can't connect to a URL, a URL is an absolute location of an internet resource, eg hostname + (virtual) location on a server + page name. A socket can connect to an IP address or hostname - which is the first part of the URL after the http://; (or ftp:// etc) You need to post a code snippet and the errors you are getting. -- http://mail.python.org/mailman/listinfo/python-list
Re: WSGI with mod_python (was: Python, WSGI, legacy web application)
Ben Finney wrote: I was under the impression that WSGI in mod_python was a rather kludgy way to do WSGI, but I don't know what the alternatives are. CGI? Python http server (e.g. CherryPy)? Something else? You can use FastCGI or SCGI too, with Apache, lighttpd or Cherokee. I have a short description of different ways to run a WSGI app here: http://pydap.org/docs/server.html Though it's focused on a specific WSGI app I wrote it uses Paste Deploy, so you can generalize it easily. --Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: The Python Papers Edition One
I for one like the pdf format. Nothing irks me more than help files in multipage HTML. I want a document I can easily download and save. Thanks for your efforts. [EMAIL PROTECTED] wrote: Greetings all, Some of you may have noticed the launch of the Python Journal a while back. Due to artistic differences, the journal has now been re-launched as The Python Papers. It is available under a Creative Commons License, something we felt was appropriate given its nature. Many here commented that this was important to them, and it is important to us also. For a fuller description of what we hope the journal to be, I re-create my inaugural blog posting at the end of this email, or it can be found online here: http://pythonpapers.cgpublisher.com/diary Some of you had a number of specific points to raise, which I can now answer properly since launching under our own banner. 1.) It takes too many clicks to download. A) We know, but it's like that to save our server. We will be publishing to a number of online archives, back-issues may be back-linkable from those. 2.) Is it free? A) Yes, as in beer and as in freedom. Creative Commons 2.5 Noncommercial, attribution, share-alike. 3.) Can I have an HTML version? A) No, we like it pretty. 4.) Why not try (insert favourite thing here) A) We will. Thanks for the fish. Volume 1, Edition 1 makes history Welcome to The Python Papers. This journal, small though it is, represents the careful efforts of a small group of Python enthusiasts who are keen to form a better community in which developers may work. As Editor-In-Chief, my role is manifold, but my goals are to improve the level of connectedness of Python developers, and in so doing improve my own developer experience. The entire editorial board has put time into making this publication something which will hopefully lead to a buildup of momentum, fuelled by the enthusiastic involvement of others who find Python as exciting as we do. The current issue contains one academic, peer-reviewed article, one industry article, and a list of events coming up in Melbourne, Australia. We would like to expand this list significantly. We offer our services in organising, collating and reviewing submitted content such that Python developers around the world may participate in the creation of something bigger than all of us, for the benefit of all of us. It may be a small journal, a little thing really, but all are welcome, and we look forward to getting to know our readers through the written word. Please download the first edition, and consider both what it is and what it might be. For those of you looking to publish an academic paper as a part of coursework or for interest's sake alone, we can offer a formal review process which will meet those guidelines while preserving the goals of freedom of information and community spirit. Those who are using Python in their work may like to consider using the journal as a means of expressing successes or frustrations with either the language itself or specific applications. We may be able to offer code reviews and style guides, and would be happy to hear about and help propagate news of what is happening so that everyone can take an interest. For those who would like a reliable source of information, The Python Papers presents a unique and current view into the state of Python at large. To all of you, welcome! Cheers, -Tennessee (Editor-In-Chief) -- http://mail.python.org/mailman/listinfo/python-list
Re: WSGI with mod_python (was: Python, WSGI, legacy web application)
Rob De Almeida wrote: Ben Finney wrote: I was under the impression that WSGI in mod_python was a rather kludgy way to do WSGI, but I don't know what the alternatives are. CGI? Python http server (e.g. CherryPy)? Something else? You can use FastCGI or SCGI too, with Apache, lighttpd or Cherokee. I think the motivation behind suggesting an Apache solution was that you'd be able to migrate the PHP resources you already have running in Apache (I assume, since PHP can run in other places these days) to mod_python whilst staying within the Apache environment, rather than having to maintain a number of different environments at the same time. In other words, you'd write your replacement resources using WSGI (or whatever) on mod_python (for performance), CGI (for relative simplicity), or some other connection technology, and then it'd just be a matter of changing the various directives and having Apache figure it out. I know some people advocate proxying to a variety of backend servers, and the Web obviously lends itself to flexible architectures in this respect, but there are fairly good reasons for keeping the component count low. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
OK, here's what I want... I'm doing a auto-tasking tool in which user can specify the execution rule by inputting English instead of a complex GUI interface(Normally a combination of many controls). This way is way better user interaction. So the problem comes down to understanding user input and suggesting possible inputs when user is writing a rule. Rules will be like 30 minutes later, Next Monday, Every 3 hours, 3pm...Sure this is an infinite collection, but it doesn't have to be perfect , it might make mistakes given inputs like 10 minutes after Every Monday noon. The suggesting feature is even harder, I'm still investigating possibilities. Tried NLTK_Lite, I'm sure it can understands well a good user input, but it is not doing good with some bad inputs(2 hours later here), bad inputs makes the toolkit fails to parse it. And NLTK also does not help on the suggesting part. Now I'm thinking manipulating regular expressions. I think it's possible to come up with a collection of REs to understand basic execution rules. And the question is again how to do suggestions with the RE collection. Any thoughts on this subject? I'm not a native English speaker so...please, be mistake tolerant with my post here:-) Fredrik Lundh 写道： Andy wrote: The problem is the input will be much more complex than the example, it could be something like 30 minutes later where any string starting with a number is a possible match. so if I type 1, are you going to suggest all possible numbers that start with that digit? doesn't strike me as very practical. maybe you could post a more detailed example, where you clearly explain what a pattern is and how it is defined, what prediction means, and what you want to happen as new input arrives, so we don't have to guess? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I find possible matches using regular expression?
The seems good to me, I'll try it out, thanks for the posting. Peter Otten 写道： Andy wrote: I'm trying to do some predicting work over user input, here's my question: for pattern r'match me', the string 'no' will definitely fail to match, but 'ma' still has a chance if user keep on inputting characters after 'ma', so how do I mark 'ma' as a possible match string? The following may or may not work in the real world: import re def parts(regex, flags=0): candidates = [] for stop in reversed(range(1, len(regex)+1)): partial = regex[:stop] try: r = re.compile(partial + $, flags) except re.error: pass else: candidates.append(r) candidates.reverse() return candidates if __name__ == __main__: candidates = parts(r[a-z]+\s*=\s*\d+, re.IGNORECASE) def check(*args): s = var.get() for c in candidates: m = c.match(s) if m: entry.configure(foreground=#008000) break else: entry.configure(foreground=red) import Tkinter as tk root = tk.Tk() var = tk.StringVar() var.trace_variable(w, check) entry = tk.Entry(textvariable=var) entry.pack() root.mainloop() The example lets you write an assignment of a numerical value, e. g meaning = 42 and colours the text in green or red for legal/illegal entries. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Tor Erik Soenvisen wrote: I've seen code like this: if type([]) is list: print 'Is list' which seem to work. And also I've seen var is None, as you mention. None is guaranteed to be a singleton: http://effbot.org/pyref/type-none.htm Why is works for type objects should be pretty obvious, of course. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Tor Erik Soenvisen wrote: (len(['']) is 1) == (len(['']) == 1) = True len(['']) 1 len(['']) is 1 True len(['']) == 1 True True == True True (len(['']) is 1) == (len(['']) == 1) True What did you expect? Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: socket.error connection refused
Vania wrote: IOError: [Errno socket error] (10061, 'Connection refused') What does telnet www.google.com 80 in some cmd.exe window say? The same? Regards, Björn -- BOFH excuse #36: dynamic software linking table corrupted -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter, main loop question.
Exod wrote: Don't know if its possible in this light-weight GUI toolset, but can i somehow hook up into the mainloop in it, for example if i were to create an internet application, i would need to keep recieving data from within it? That's something where you could try the Twisted framework (http://twistedmatrix.com). Its event loop integrates with many GUI toolkits', also Tk's. Regards, Björn -- BOFH excuse #394: Jupiter is aligned with Mars. -- http://mail.python.org/mailman/listinfo/python-list
Re: Porting Tkinter application to JYthon
Hi Sandip, JPype could be a solution to implement the second option mentioned by Tim: http://jpype.sourceforge.net/ Thanks, Andre http://www.burgaud.com/ On 23 Nov 2006 05:36:46 -0800, Tim N. van der Leeuw [EMAIL PROTECTED] wrote: Hi, sandip desale wrote: Dear All, We have a Tcl/Tk application written using Python 2.2. Using this application we want to call some customizable Java APIs. I tried porting Tcl/Tk application to Jython but not able to do the same as TKinter library is not available with JYthon. Can you please help me in porting Tkinter application to Jython? Also kindly let me know how to do the same. Not having Tkinter in Jython, you can either rewrite your app to be a Java Swing app, or you can embed the Java JVM into the Python interpreter as an importable library. I believe some projects exist to enable the latter, although I don't know of a URL. Cheers, --Tim Thanks Regards, Sandip Desale -- Search for products and services at: http://search.mail.com -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
ldapsearch example in python-ldap?
Hi there, on a linux machine I am running this ldapsearch from the command line: ldapsearch -x -h myldaphost.mydomain.com \ -D CN=ldapuser,CN=Users,DC=mydomain,DC=com -w secret \ -b CN=ANYCOMPUTER,CN=Computers,DC=mydomain,DC=com How can I do this with python-ldap? Regards, Nico -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I separate my parameters with spawnv
Thank you very much -- Ceci est une signature automatique de MesNews. Site : http://www.mesnews.net -- http://mail.python.org/mailman/listinfo/python-list
Email headers and non-ASCII characters
Hello, everyone... I'm trying to send an email to people with non-ASCII characters in their names. A recpient's address may look like: Jörg Nørgens [EMAIL PROTECTED] My example code: = def sendmail(sender, recipient, body, subject): message = MIMEText(body) message['Subject'] = Header(subject, 'iso-8859-1') message['From'] = Header(sender, 'iso-8859-1') message['To'] = Header(recipient, 'iso-8859-1') s = smtplib.SMTP() s.connect() s.sendmail(sender, recipient, message.as_string()) s.close() = However the Header() method encodes the whole expression in ISO-8859-1: =?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?= However I had expected something like: =?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?= [EMAIL PROTECTED] Of course my mail transfer agent is not happy with the first string although I see that Header() is just doing its job. I'm looking for a way though to encode just the non-ASCII parts like any mail client does. Does anyone have a recipe on how to do that? Or is there a method in the email module of the standard library that does what I need? Or should I split by regular expression to extract the email address beforehand? Or a list comprehension to just look for non-ASCII character and Header() them? Sounds dirty. Hints welcome. Regards Christoph -- http://mail.python.org/mailman/listinfo/python-list
Re: combining the path and fileinput modules
wo_shi_big_stomach wrote:
Newbie to python writing a script to recurse a directory tree and delete
the first line of a file if it contains a given string. I get the same
error on a Mac running OS X 10.4.8 and FreeBSD 6.1.
Here's the script:
# start of program
# p.pl - fix broken SMTP headers in email files
#
# recurses from dir and searches all subdirs
# for each file, evaluates whether 1st line starts with From
# for each match, program deletes line
import fileinput
import os
import re
import string
import sys
from path import path
# recurse dirs
dir = path(/home/wsbs/Maildir)
for f in dir.walkfiles('*'):
#
# test:
# print f
Are you absolutely sure that f list doesn't contain
any path to directory, not file?
Add this:
f = filter(os.path.isfile, f)
and try one more time.
#
# open file, search, change if necessary, write backup
for line in fileinput.input(f, inplace=1, backup='.bak'):
# check first line only
if fileinput.isfirstline():
if not re.search('^From ',line):
print line.rstrip('\n')
# just print all other lines
if not fileinput.isfirstline():
print line.rstrip('\n')
fileinput.close()
# end of program
--
HTH,
Rob
--
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non blocking i o, The deep freeze.
Hi Have a problem, Ill give some history to the problem and add a little example code to start with to see if anybody can help or if I am correct in what the problem is. I have been looking on the newsgroups and have found lots of stuff on the problem but no solutions as of yet, will keep looking here to see if I can find one that fits. I created a script which runs a whole suite of regression tests, the test exe which is built daily, is created from c code, this changes from day to day as stuff is added, and fixed, the exe is then used to run text files which have lots of commands and data in, which produce lots of pretty pictures on the screen, errors and warning output is also produced from this, which I collect and create logs with. Up until recently I havn't had any problems with my script, the main tests were run on a local win32 machine with all the logs and test files all local, with occasional runs on various different unix's and win64 platforms. We have just recently had installed a big test and build rack full of win32 (winxp) machines 3 of these are automated test machines which run my script in a loop (it also builds the test exe and does one or two other things), the test files are now held on a big central disk, which was ment to save me coping data down from the network. The whole thing works pretty well, a part from every so offen completely randomly the 3 machines seem to freeze (or to put in the terms of our sys admin it trashes them). The machines needs to be reset and the connection between the machines and the big central disk is lost and needs to be reset as well. According to the sys admin I need to be using, non blocking i o for my file control, the code below shows what Im doing at the moment. Has any one got any suggestions on what to do here, I kept everything really simple so it would work across all platform and I thought I was there, but like with most things, its not and the code will probably get really complex. The code below is only a small snipet and I've made it simple for this example but its the part I think where the freeze is happening. output, input = popen2(cmd.exe) input.write(set LI_DIR= + MW_OPTS.GetOption(MainOpts,LI_DIR) + \n) input.write(set LI\n) # Writes commands to it. input.write(mwtest_exe + mwtest_args + os.path.dirname(f_testlwc_str) + testlwc + \n) input.write(exit\n) while 1: text = output.readline() if text: OutputCount += 1 # Searches the line for errors, when found stops doing this. f_Error_Code = FileLineQuickStat(text , f_Possible_Errs_dict , f_Error_Code) # Records the line in a log. LW_FLOG.WriteLogEntry(TEST_LOG,str(OutputCount),string.replace(text,\n,),1) else: LW_FLOG.FinishLog(TEST_LOG,) # Returns the error code. return f_Error_Code break TIA Guy -- http://mail.python.org/mailman/listinfo/python-list
Re: 10, 20, 30 to [10, 20, 30]
Tim Williams wrote:
It is a dangerous solution if your data is coming from an untrusted source.
s = 10, 20, 30
L = [x.strip() for x in s.split(',')]
L
['10', '20', '30']
L = [int(x) for x in L]
L
[10, 20, 30]
Or, as a one liner: [int(x.strip()) for x in s.split(',')]
You don't need the strip()
int('10 ')
10
and the use of a list comprehension is pretty silly to, given that you want
to apply the same *function* to all items, and don't really need to look
it up for every item:
map(int, s.split(','))
/F
--
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Re: Email headers and non-ASCII characters
On Thursday 23 November 2006 15:12, I wrote: My example code: = def sendmail(sender, recipient, body, subject): message = MIMEText(body) message['Subject'] = Header(subject, 'iso-8859-1') message['From'] = Header(sender, 'iso-8859-1') message['To'] = Header(recipient, 'iso-8859-1') s = smtplib.SMTP() s.connect() s.sendmail(sender, recipient, message.as_string()) s.close() = Just for completeness - of course I imported the Header methods from here: from email.MIMEText import MIMEText from email.Header import Header Christoph -- http://mail.python.org/mailman/listinfo/python-list
Re: socket.error connection refused
Hi, the telnet call succeed Vania Bjoern Schliessmann ha scritto: Vania wrote: IOError: [Errno socket error] (10061, 'Connection refused') What does telnet www.google.com 80 in some cmd.exe window say? The same? Regards, Björn -- BOFH excuse #36: dynamic software linking table corrupted -- http://mail.python.org/mailman/listinfo/python-list
Re: non blocking i o, The deep freeze.
[EMAIL PROTECTED] wrote: The whole thing works pretty well, a part from every so offen completely randomly the 3 machines seem to freeze (or to put in the terms of our sys admin it trashes them). thrashing? that usually means that a process uses too much memory, thus causing the system to spend too much time swapping to be able to do anything useful. have you checked the process size during normal operations? is it stable, or does it grow a little all the time? According to the sys admin I need to be using, non blocking i o for my file control if the problem is thrashing, I'm not sure I see how that would help. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: 10, 20, 30 to [10, 20, 30]
On 23/11/06, Fredrik Lundh [EMAIL PROTECTED] wrote:
Tim Williams wrote:
and the use of a list comprehension is pretty silly to, given that you want
to apply the same *function* to all items, and don't really need to look
it up for every item:
map(int, s.split(','))
Haha, thanks Frederic, I wondered how long it would take for a reply
from you :)
Silly though ??
Tim :)
--
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ImportError: No module named getopt
I am running a python script which has the line import getopt, sys, os, re, string And i get the error ImportError: No module named getopt Could you please point out a possible solution for this? -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to understand Python objects
In article [EMAIL PROTECTED],
Ben Finney [EMAIL PROTECTED] wrote:
Typically, classes are created as a subclass of another class. The
top-level basic type in Python is 'object', so if your class doesn't
make sense deriving from anything else, derive from 'object'.
class Point(object):
pass
Defining a class with *no* superclass is not recommended. If you don't
yet understand the difference between the above style (called a
new-style class) and the style you presented, you should always
derive from a superclass ('object' or something more specific) until
you encounter a situation where that causes a problem.
Side note: I disagree with the above advice, but it's Thanksgiving and I
don't have enough room on the margin for the proof. I think classic
classes are just fine.
--
Aahz ([EMAIL PROTECTED]) * http://www.pythoncraft.com/
In many ways, it's a dull language, borrowing solid old concepts from
many other languages styles: boring syntax, unsurprising semantics,
few automatic coercions, etc etc. But that's one of the things I like
about it. --Tim Peters on Python, 16 Sep 1993
--
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Re: combining the path and fileinput modules
On 11/23/06 6:15 AM, Rob Wolfe wrote:
wo_shi_big_stomach wrote:
Newbie to python writing a script to recurse a directory tree and delete
the first line of a file if it contains a given string. I get the same
error on a Mac running OS X 10.4.8 and FreeBSD 6.1.
Here's the script:
# start of program
# p.pl - fix broken SMTP headers in email files
#
# recurses from dir and searches all subdirs
# for each file, evaluates whether 1st line starts with From
# for each match, program deletes line
import fileinput
import os
import re
import string
import sys
from path import path
# recurse dirs
dir = path(/home/wsbs/Maildir)
for f in dir.walkfiles('*'):
#
# test:
# print f
Are you absolutely sure that f list doesn't contain
any path to directory, not file?
Add this:
f = filter(os.path.isfile, f)
and try one more time.
Sorry, no joy. Printing f then produces:
rppp
rp
rp
rpppr
rp
rpppP
rp
rp
which I assure you are not the filenames in this directory.
I've tried this with f and f.name. The former prints the full pathname
and filename; the latter prints just the filename. But neither works
with the fileinput.input() call below.
I get the same error with the filtered mod as before:
File ./p, line 23, in ?
for line in fileinput.input(f, inplace=1, backup='.bak'):
Thanks again for info on what to feed fileinput.input()
#
# open file, search, change if necessary, write backup
for line in fileinput.input(f, inplace=1, backup='.bak'):
# check first line only
if fileinput.isfirstline():
if not re.search('^From ',line):
print line.rstrip('\n')
# just print all other lines
if not fileinput.isfirstline():
print line.rstrip('\n')
fileinput.close()
# end of program
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Re: ImportError: No module named getopt
prashant wrote: I am running a python script which has the line import getopt, sys, os, re, string And i get the error ImportError: No module named getopt Could you please point out a possible solution for this? looks like a broken installation. try running the script as python -vv script.py and see where it looks for the getopt module. is the ImportError all you get, btw ? it doesn't complain about site.py before that ? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to understand Python objects
In article [EMAIL PROTECTED], walterbyrd [EMAIL PROTECTED] wrote: Is there some book, or other reference, that explains of this? I was thinking about Python for Dummies. The Think like a Computer Scientist book, and Dive into Python book don't seem to explain Python's object model clearly enough for me. Speaking as the co-author of _Python for Dummies_, we certainly tried to make much of this clear, but I haven't seen any reviews yet (partly our fault for not getting out review copies). -- Aahz ([EMAIL PROTECTED]) * http://www.pythoncraft.com/ In many ways, it's a dull language, borrowing solid old concepts from many other languages styles: boring syntax, unsurprising semantics, few automatic coercions, etc etc. But that's one of the things I like about it. --Tim Peters on Python, 16 Sep 1993 -- http://mail.python.org/mailman/listinfo/python-list
Simple threading
I'm just getting started on threading and was wondering why the
following code does not work (i know globals is bad style - I'll
eliminate them eventually). All I get is a blank cursor flashing.
Many thanks
Jon
import threading
import sys
import time
global g_datum
global g_rawfile
global g_rawtext
global g_overs
global g_currentover
global g_secondspertick
g_secondspertick=5
g_datum=time.time()
g_currenttick=1
g_rawfile=open('inputashes.txt','r')
g_rawtext=g_rawfile.read()
g_overs=g_rawtext.split('P')
g_currentover=0
class ImapThread(threading.Thread):
def run(self):
global g_currenttick
if time.time() (g_datum + (g_secondspertick *
g_currenttick)):
print Ticked %s % g_currenttick
g_currenttick=g_currenttick+1
print g_currenttick
sys.stdout.flush()
time.sleep(0.01)
def main():
ImapThread().start()
while 1:
pass
if __name__ == __main__:
main()
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Re: PyParsing and Headaches
Heya there,
Ok, found the solution. I just needed to use leaveWhiteSpace() in the
places I want pyparsing to take into consideration the spaces.
Thx for the help.
Cheers!
Hugo Ferreira
On Nov 23, 11:57 am, Bytter [EMAIL PROTECTED] wrote:
(This message has already been sent to the mailing-list, but I don't
have sure this is arriving well since it doesn't come up in the usenet,
so I'm posting it through here now.)
Chris,
Thanks for your quick answer. That changes a lot of stuff, and now I'm
able to do my parsing as I intended to.
Still, there's a remaining problem. By using Combine(), everything is
interpreted as a single token. Though what I need is that
'include_bool' and 'literal' be parsed as separated tokens, though
without a space in the middle...
Paul,
Thanks for your detailed explanation. One of the things I think is
missing from the documentation (or that I couldn't find easy) is the
kind of explanation you give about 'The Way of PyParsing'. For example,
It took me a while to understand that I could easily implement simple
recursions using OneOrMany(Group()). Or maybe things were out there and
I didn't searched enough...
Still, fwiw, congratulations for the library. PyParsing allowed me to
do in just a couple of hours, including learning about it's API (minus
this little inconvenient) what would have taken me a couple of days
with, for example, ANTLR (in fact, I've already put aside ANTLR more
than once in the past for a built-from-scratch parser).
Cheers,
Hugo Ferreira
On Nov 22, 7:50 pm, Chris Lambacher [EMAIL PROTECTED] wrote:
On Wed, Nov 22, 2006 at 11:17:52AM -0800, Bytter wrote:
Hi,
I'm trying to construct a parser, but I'm stuck with some basic
stuff... For example, I want to match the following:
letter = A...Z | a...z
literal = letter+
include_bool := + | -
term = [include_bool] literal
So I defined this as:
literal = Word(alphas)
include_bool = Optional(oneOf(+ -))
term = include_bool + literal+ here means that you allow a space. You
need to explicitly override this.
Try:
term = Combine(include_bool + literal)
The problem is that:
term.parseString(+a) - (['+', 'a'], {}) # OK
term.parseString(+ a) - (['+', 'a'], {}) # KO. It shouldn't
recognize any token since I didn't said the SPACE was allowed between
include_bool and literal.
Can anyone give me an hand here?
Cheers!
Hugo Ferreira
BTW, the following is the complete grammar I'm trying to implement with
pyparsing:
## L ::= expr | expr L
## expr ::= term | binary_expr
## binary_expr ::= term binary_op term
## binary_op ::= * | OR | AND
## include_bool ::= + | -
## term ::= ([include_bool] [modifier :] (literal | range)) | (~
literal)
## modifier ::= (letter | _)+
## literal ::= word | quoted_words
## quoted_words ::= '' word ( word)* ''
## word ::= (letter | digit | _)+
## number ::= digit+
## range ::= number (.. | ...) number
## letter ::= A...Z | a...z
## digit ::= 0...9
And this is where I got so far:
word = Word(nums + alphas + _)
binary_op = oneOf(* and or, caseless=True).setResultsName(operator)
include_bool = oneOf(+ -)
literal = (word | quotedString).setResultsName(literal)
modifier = Word(alphas + _)
rng = Word(nums) + (Literal(..) | Literal(...)) + Word(nums)
term = ((Optional(include_bool) + Optional(modifier + :) + (literal |
rng)) | (~ + literal)).setResultsName(Term)
binary_expr = (term + binary_op + term).setResultsName(binary)
expr = (binary_expr | term).setResultsName(Expr)
L = OneOrMore(expr)
--
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Re: Email headers and non-ASCII characters
Christoph Haas skrev: Hello, everyone... I'm trying to send an email to people with non-ASCII characters in their names. A recpient's address may look like: Jörg Nørgens [EMAIL PROTECTED] My example code: = def sendmail(sender, recipient, body, subject): message = MIMEText(body) message['Subject'] = Header(subject, 'iso-8859-1') message['From'] = Header(sender, 'iso-8859-1') message['To'] = Header(recipient, 'iso-8859-1') s = smtplib.SMTP() s.connect() s.sendmail(sender, recipient, message.as_string()) s.close() = However the Header() method encodes the whole expression in ISO-8859-1: =?iso-8859-1?q?=22J=C3=B6rg_N=C3=B8rgens=22_=3Cjoerg=40nowhere=3E?= However I had expected something like: =?utf-8?q?J=C3=B6rg?= =?utf-8?q?_N=C3=B8rgens?= [EMAIL PROTECTED] Of course my mail transfer agent is not happy with the first string Why offcourse? But it seems that you are passing the Header object a utf-8 encoded string, not a latin-1 encoded. You are telling the header the encoding. Not asking it to encode. -- hilsen/regards Max M, Denmark http://www.mxm.dk/ IT's Mad Science -- http://mail.python.org/mailman/listinfo/python-list
Re: The Python Papers Edition One
[EMAIL PROTECTED] wrote: 1.) It takes too many clicks to download. A) We know, but it's like that to save our server. We will be publishing to a number of online archives, back-issues may be back-linkable from those. Please consider using S3, coral cache, or similar to distribute, if the server limitations are a cause of fewer people reading. I'd be happy to help you get going with S3 if you like, otherwise, coral CDN couldn't be simpler to use (if a bit unstable). -- http://mail.python.org/mailman/listinfo/python-list
Re: Simple threading
jrpfinch wrote:
I'm just getting started on threading and was wondering why the
following code does not work (i know globals is bad style - I'll
eliminate them eventually). All I get is a blank cursor flashing.
Many thanks
Jon
import threading
import sys
import time
global g_datum
global g_rawfile
global g_rawtext
global g_overs
global g_currentover
global g_secondspertick
g_secondspertick=5
g_datum=time.time()
g_currenttick=1
g_rawfile=open('inputashes.txt','r')
g_rawtext=g_rawfile.read()
g_overs=g_rawtext.split('P')
g_currentover=0
class ImapThread(threading.Thread):
def run(self):
global g_currenttick
if time.time() (g_datum + (g_secondspertick *
g_currenttick)):
print Ticked %s % g_currenttick
g_currenttick=g_currenttick+1
print g_currenttick
sys.stdout.flush()
time.sleep(0.01)
def main():
ImapThread().start()
while 1:
pass
if __name__ == __main__:
main()
Run gets called only once: you need to put your logic in a while True
or something equivalent/define some escape clause.
Right now you just get into the implicit else and get out.
hg
import time
global g_datum
global g_rawfile
global g_rawtext
global g_overs
global g_currentover
global g_secondspertick
g_secondspertick=5
g_datum=time.time()
g_currenttick=1
#g_rawfile=open('inputashes.txt','r')
#g_rawtext=g_rawfile.read()
#g_overs=g_rawtext.split('P')
g_currentover=0
class ImapThread(threading.Thread):
def run(self):
while True:
global g_currenttick
if time.time() (g_datum + (g_secondspertick *
g_currenttick)):
print Ticked %s % g_currenttick
g_currenttick=g_currenttick+1
print g_currenttick
sys.stdout.flush()
else:
print 'HERE'
time.sleep(0.01)
def main():
ImapThread().start()
while 1:
pass
if __name__ == __main__:
main()
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Re: Pyparsing Question.
Welcome to pyparsing! The simplest way to implement a markup processor in pyparsing is to define the grammar of the markup, attach a parse action to each markup type to convert the original markup to the actual results, and then use transformString to run through the input and do the conversion. This discussion topic has some examples: http://pyparsing.wikispaces.com/message/view/home/31853. Thanks for the pointers - I had a look through the examples on the pyparsing website, but none seemed to show a simple example of this kind of thing. The discussion topic you noted above is exactly the sort of thing I was after! Cheers, -- http://mail.python.org/mailman/listinfo/python-list
select() on WinXP
I'm running Python 2.5 on Windows XP. When I try to do this: [code] import select select.select([], [], []) [/code] I get this: [output] Traceback (most recent call last): File C:/Documents and Settings/Grebekel/Desktop/s.py, line 2, in module select.select([],[],[]) error: (10022, 'An invalid argument was supplied') [/output] Is there anything I should be aware of to get select() working under Windows? -- http://mail.python.org/mailman/listinfo/python-list
Re: ImportError: No module named getopt
Thanks for the reply, I am actually using Cygwin to run a python script. I have python 2.5 installed. But when i ran the command mentioned by you... I see that it is looking in the wrong directories... how can i change these look up directories? Fredrik Lundh wrote: prashant wrote: I am running a python script which has the line import getopt, sys, os, re, string And i get the error ImportError: No module named getopt Could you please point out a possible solution for this? looks like a broken installation. try running the script as python -vv script.py and see where it looks for the getopt module. is the ImportError all you get, btw ? it doesn't complain about site.py before that ? /F -- http://mail.python.org/mailman/listinfo/python-list
Re: select() on WinXP
[EMAIL PROTECTED] wrote: I'm running Python 2.5 on Windows XP. When I try to do this: [code] import select select.select([], [], []) [/code] I get this: [output] Traceback (most recent call last): File C:/Documents and Settings/Grebekel/Desktop/s.py, line 2, in module select.select([],[],[]) error: (10022, 'An invalid argument was supplied') [/output] Is there anything I should be aware of to get select() working under Windows? like, say, only calling select if you actually have something you want to select on? (if you want to sleep, use time.sleep()) /F -- http://mail.python.org/mailman/listinfo/python-list
Does only emacs and idle support symbolic debugging?
Subject line pretty much says it all - are those the only two editors that support running the symbolic debugger from inside the editor? vic -- Never attribute to malice that which can be adequately explained by stupidity. - Hanlon's Razor -- http://mail.python.org/mailman/listinfo/python-list
Re: ImportError: No module named getopt
prashant wrote: I am actually using Cygwin to run a python script. I have python 2.5 installed. But when i ran the command mentioned by you... I see that it is looking in the wrong directories... how can i change these look up directories? is PYTHONHOME perhaps set to the wrong thing? if not, you can point it to the root of your Python installation. use python -h for more alternatives. /F -- http://mail.python.org/mailman/listinfo/python-list
[ANN] pylint 0.12.2 / astng 0.16.3
Hi there ! I'm pleased to announce new bugs fix releases of pylint and astng. Most bug discussed more or less recently on the python-projects mailing list should be fixed by those releases, and astng inference capability has been enhanced for some construction, so upgrade is recommended. Visit the respective projects'page of our fresh new .org site to get the latest source distribution :o) http://www.logilab.org/project/name/pylint http://www.logilab.org/project/name/logilab-astng Enjoy ! -- Sylvain Thénault LOGILAB, Paris (France) Formations Python, Zope, Plone, Debian: http://www.logilab.fr/formations Développement logiciel sur mesure: http://www.logilab.fr/services Python et calcul scientifique: http://www.logilab.fr/science -- http://mail.python.org/mailman/listinfo/python-list
Re: Does only emacs and idle support symbolic debugging?
Victor Ng wrote: Subject line pretty much says it all - are those the only two editors that support running the symbolic debugger from inside the editor? Nope, eric for example does as well. And I presume komodo will do that also. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: What's going on here?
Thanks for the answers. I am informed but I don't feel enlightened. It does strike me as odd that an apparently empty subclass should add extra function to the base class. Not at all obvious. -- Dale Strickland-Clark We are recruiting Python programmers. Please see the web site. Riverhall Systems www.riverhall.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: ldapsearch example in python-ldap?
Nico Grubert wrote: on a linux machine I am running this ldapsearch from the command line: ldapsearch -x -h myldaphost.mydomain.com \ -D CN=ldapuser,CN=Users,DC=mydomain,DC=com -w secret \ -b CN=ANYCOMPUTER,CN=Computers,DC=mydomain,DC=com How can I do this with python-ldap? http://python-ldap.sourceforge.net/docs.shtml contains some links to introductions. This command above boils down to: l=ldap.initialize(ldap://myldaphost.mydomain.com;) l.simple_bind_s(CN=ldapuser,CN=Users,DC=mydomain,DC=com,secret) r = l.search_s( CN=ANYCOMPUTER,CN=Computers,DC=mydomain,DC=com, ldap.SCOPE_SUBTREE, # this is the default of ldapsearch (objectClass=*) ) But you really should learn more about it by diving into: http://python-ldap.sourceforge.net/doc/python-ldap/ldap-objects.html Ciao, Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: select() on WinXP
I'm using it for sockets, it works on linux but not on Windows. The actual code is something like (server side): r, w, e = select.select(self.clients, [], self.clients, 5) where self.clients is a list of accepted sockets. -- http://mail.python.org/mailman/listinfo/python-list
Re: select() on WinXP
[EMAIL PROTECTED] schrieb: I'm using it for sockets, it works on linux but not on Windows. The actual code is something like (server side): r, w, e = select.select(self.clients, [], self.clients, 5) where self.clients is a list of accepted sockets. The docs for select.select say: Empty sequences are allowed, but acceptance of three empty sequences is platform-dependent. (It is known to work on Unix but not on Windows.) Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: ImportError: No module named getopt
thanks a lot that helped... Fredrik Lundh wrote: prashant wrote: I am actually using Cygwin to run a python script. I have python 2.5 installed. But when i ran the command mentioned by you... I see that it is looking in the wrong directories... how can i change these look up directories? is PYTHONHOME perhaps set to the wrong thing? if not, you can point it to the root of your Python installation. use python -h for more alternatives. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Abelson and Python
markscottwright wrote: Fredrik Lundh wrote: markscottwright wrote: If it were that easy, the PyPy guys would be done by now. if the PyPy guys had focused on writing a Python interpreter in Python, they'd been done by now. /F Isn't that the point of PyPy? It's what their mission statement says (http://codespeak.net/pypy/dist/pypy/doc/architecture.html#mission-statement): PyPy is an implementation of the Python programming language written in Python itself, flexible and easy to experiment with. This is something that is amazingly easy to do in scheme, since the language is so simple, but is typically pretty difficult to do in other languages That said, I see now that the course we're talking about isn't the same as the old 6.001 course, and presumably has different pedagogical goals. There are a more than a few library functions in the Python code that are written in C in CPython. Not only is PyPy trying to get the _entire_ Python system into Python, it is trying to do so in a friendly-to-translation-in-a-statically-typed-language way. Besides, if you can freely use eval and exec, how hard is a pure python language interpreter? --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: select() on WinXP
I patched the code to: if self.clients: r, w, e = select.select(self.clients, [], self.clients, 5) It works now, thank you Thomas :) -- http://mail.python.org/mailman/listinfo/python-list
Re: What's going on here?
Dale Strickland-Clark wrote:
Thanks for the answers. I am informed but I don't feel enlightened.
It does strike me as odd that an apparently empty subclass should add extra
function to the base class.
Not at all obvious.
Yes. As said, there is missing a __builtin__.Object
object is not an empty class, but the base builtin-type:
isinstance(int,object)
True
built-in type instances are basically read-only because if ...
(1).spam=1
Traceback (most recent call last):
File interactive input, line 1, in ?
AttributeError: 'int' object has no attribute 'spam'
..would work, that would be very strange.
Maybe in a mud place language like Ruby, where you can jam and scribble
everywhere in the system and in builtins, such things are possible.
I'd propose to add something trivial like
class Object(object):
def __init__(self,_d={},**kwargs):
kwargs.update(_d)
self.__dict__=kwargs
...
to Python. I use such empty (common) class since all time I can think of - and
frequently.
If there would be a common such Empty class in Python you'd have a lot of
advantanges. From ad-hoc instances, OO-dicts to reliable pickling of bunches
of variables etc.
Robert
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Re: Does only emacs and idle support symbolic debugging?
PyScripter (windows only) here: http://mmm-experts.com/Products.aspx?ProductId=4 On Nov 23, 4:00 pm, Diez B. Roggisch [EMAIL PROTECTED] wrote: Victor Ng wrote: Subject line pretty much says it all - are those the only two editors that support running the symbolic debugger from inside the editor?Nope, eric for example does as well. And I presume komodo will do that also. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Simple threading
many thanks - works perfectly now -- http://mail.python.org/mailman/listinfo/python-list
Re: How to sort list
In article [EMAIL PROTECTED],
Lad [EMAIL PROTECTED] wrote:
I have a list of emails and I would like to sorted that list by domains
E.g.
If the list is
Emails=['[EMAIL PROTECTED]','[EMAIL PROTECTED]','[EMAIL PROTECTED]','[EMAIL
PROTECTED]',]
after sorting I would like to have
Emails=['[EMAIL PROTECTED]','[EMAIL PROTECTED]','[EMAIL PROTECTED]','[EMAIL
PROTECTED]',]
What is the best/easiest way?
One reasonable option is to use the .sort() method of a list:
Emails.sort(key = lambda s: list(reversed(s.split('@'
The key parameter specifies how to obtain a sort key from each element
in the source list.
Cheers,
-M
--
Michael J. Fromberger | Lecturer, Dept. of Computer Science
http://www.dartmouth.edu/~sting/ | Dartmouth College, Hanover, NH, USA
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Python business software?
Hello- My wife runs a sewing/embroidery business and has asked me to write a system to help her with her client database, inventory, and accounts receivable/payable. I've looked into using either PythonCard or Dabo (I like both packages) but thought I ask the list if there is anything like this out there already. Tasks such as tracking clients are fairly routine in business, so maybe there's something close that I could hack in order to add details specific to our business. We only have one computer right now, so we don't *need* a web-based system but we plan on growing so it would be an option. Thanks for you help, --greg -- http://mail.python.org/mailman/listinfo/python-list
python gaining popularity according to a study
http://www.tiobe.com/index.htm?tiobe_index Python is the 7th most commonly used language, up from 8th. The only one gaining ground besides VB in the top 10. We're glad, our app is written in python. It's free at http://pnk.com and it is a web timesheet for project accounting -- http://mail.python.org/mailman/listinfo/python-list
Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Fredrik Lundh wrote:
4) [] and {} always create a new object every time they're evaluated.
Not quite. The empty tuple is cached:
a = ()
b = ()
a is b
True
Cheers,
Brian
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Re: len(var) is [CONSTANT] equal to len(var) == [CONSTANT]?
Brian Quinlan wrote:
4) [] and {} always create a new object every time they're evaluated.
Not quite. The empty tuple is cached:
a = ()
b = ()
a is b
True
() isn't [] or {}, though. time to switch to a bigger font? ;-)
/F
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Re: The Python Papers Edition One
Tennessee writes: * If you say LaTex, I'll eat your brain. Or my hat. Unless I'm seriously underrating it, but I don't think so. Why? It is a suitable solution to this problem. You can produce unformatted content, then produce pdf and html pages from it. -Mike -- http://mail.python.org/mailman/listinfo/python-list
Python work in UK
Hi, I'd love to work in Python, for the sake of my blood pressure, but there doesnt seem to be that many jobs that look for Python as the main skill. I use Python at work from time to time, and occasionaly get to spend several days on a Python project but the majority of the time I use C++. How can I make that leap to working with Python? There doesn't seem to be many UK positions on the jobs section of Python.org or the usual jobs sites. Any recommended jobs sites or tips? (I have googled) In the off chance that a potential empolyer is reading this, I'm looking for something in web development, applications, graphics or other interesting field. Here is a copy of my CV. http://www.willmcgugan.com/cvwillmcgugan.pdf Regards, Will McGugan -- http://www.willmcgugan.com -- http://mail.python.org/mailman/listinfo/python-list
Python 2.5 idle and print command How do I suppress a line feed?
Hi, I am having a problem with print statements always cause a line feed. I need to print a line of text, then the next print statement will start printing where the last one stopped rather than drop down a line. In basic we can do this with print texst; followed by next command print text2 So how do I do that in python? -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to understand Python objects
Aahz a écrit :
In article [EMAIL PROTECTED],
Ben Finney [EMAIL PROTECTED] wrote:
Typically, classes are created as a subclass of another class. The
top-level basic type in Python is 'object', so if your class doesn't
make sense deriving from anything else, derive from 'object'.
class Point(object):
pass
Defining a class with *no* superclass is not recommended. If you don't
yet understand the difference between the above style (called a
new-style class) and the style you presented, you should always
derive from a superclass ('object' or something more specific) until
you encounter a situation where that causes a problem.
Side note: I disagree with the above advice, but it's Thanksgiving and I
don't have enough room on the margin for the proof. I think classic
classes are just fine.
Don't see it as a religious point please, but I fail to understand why
you seem so in love with old-style classes ? new-style classes are the
official Python object model since 2.2 (which is a few years ago now),
and the last mandatory use of them (exceptions...) disappeared with the
2.5. AFAIK, everything you do with old-style classes can be done with
new-style ones. FWIW, old-style classes support is now only for backward
compat. So *why* insisting on using them ?
wondering...
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Re: Python 2.5 idle and print command How do I suppress a line feed?
notejam wrote: Hi, I am having a problem with print statements always cause a line feed. I need to print a line of text, then the next print statement will start printing where the last one stopped rather than drop down a line. In basic we can do this with print texst; followed by next command print text2 So how do I do that in python? Thusly... print texst, print text2 -- work: http://www.kelpiesoft.com blog: http://www.willmcgugan.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.5 idle and print command How do I suppress a line feed?
notejam wrote: Hi, I am having a problem with print statements always cause a line feed. I need to print a line of text, then the next print statement will start printing where the last one stopped rather than drop down a line. In basic we can do this with print texst; followed by next command print text2 So how do I do that in python? Or if you want to get rid of the space... import sys sys.stdout.write(texst) sys.stdout.write(text2) -- -- work: http://www.kelpiesoft.com blog: http://www.willmcgugan.com -- http://mail.python.org/mailman/listinfo/python-list
Re: python gaining popularity according to a study
[EMAIL PROTECTED]: Python is the 7th most commonly used language, up from 8th. The only one gaining ground besides VB in the top 10. It also shows that Ruby is gaining even more, and D is (gladly) growing too. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Trying to understand Python objects
Bruno Desthuilliers wrote: AFAIK, everything you do with old-style classes can be done with new-style ones. The only thing I occasionally (or rather rarely) miss about old-style classes is instance-specific special methods: class C: ... def __init__(self,x): ... self.__getitem__ = lambda i: i*x ... c=C(2) c[3] 6 class N(object): ... def __init__(self,x): ... self.__getitem__ = lambda i: i*x ... n=N(2) n[3] Traceback (most recent call last): File stdin, line 1, in ? TypeError: unindexable object Of course this example can be rewritten to work for new style classes; a trickier would be to bind the instance attribute conditionally; here's a silly example: class C: ... def __init__(self,x): ... if random.random() 0.5: ... self.__getitem__ = lambda i: i*x I'm not sure if this is a conscious choice or a technical limitation of how new-style classes work internally, but I've had a use for it at least once. George -- http://mail.python.org/mailman/listinfo/python-list
