pyvm - a portable python virtual machine
pyvm 1.4.9 == More batteries to your python Introduction: pyvm is a relocatable python binary distribution containing several modules. Its main aim is to provide all this without requiring root access. Features: * pyqt (widget set) * pygtk (widget set) * nummarray (array and matematical) * pyqwt (plot widget in qt) * matplotlib (plot function similar tomatlab) * Imaging (a digital imaging library) * elementree (xml library) * and many many more. Download: http://pyvm.sourceforge.net Copyright: MIT for the building script, other licence terms apply to the singular package (see the docs) Author: Antonio Cavallo [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
convert gb18030 to utf16
i have a bunch of files encoded in GB18030. Is there a way to convert them to utf16 with python? Xah [EMAIL PROTECTED] http://xahlee.org/PageTwo_dir/more.html -- http://mail.python.org/mailman/listinfo/python-list
function with a state
is it possible in Python to create a function that maintains a variable value? something like this: globe=0; def myFun(): globe=globe+1 return globe apparently it can't be done like that. I thought it can probably be done by prefixing the variable with some package context... the Python doc is quite stilted. Where in the python doc is a programer supposed read about how the package/module system in Python works? (besides the tutorial that touches it) Xah [EMAIL PROTECTED] http://xahlee.org/PageTwo_dir/more.html -- http://mail.python.org/mailman/listinfo/python-list
Re: get textual content of a Xml element using 4DOM
Frank Abel Cancio Bello [EMAIL PROTECTED] wrote: PrettyPrint or Print return the value to the console, and i need keep this value in a string variable to work with it, how can i do this? The second parameter to either of these functions can be a stream object, so you can use a StringIO to get string output: from StringIO import StringIO from xml.dom.ext import Print buf= StringIO() Print(doc, buf) xml= buf.getvalue() -- Andrew Clover http://www.doxdesk.com/ mailto:[EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: convert gb18030 to utf16
Xah Lee [EMAIL PROTECTED] wrotE:
i have a bunch of files encoded in GB18030. Is there a way to convert
them to utf16 with python?
You will need CJKCodecs (http://cjkpython.i18n.org/), or Python 2.4,
which has them built in. Then just use them like any other codec. eg.
f= open(path, 'rb')
content= unicode(f.read(), 'gb18030')
f.close()
f= open(path, 'wb')
f.write(content.encode('utf-16'))
f.close()
--
Andrew Clover
mailto:[EMAIL PROTECTED]
http://www.doxdesk.com/
--
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Re: function expression with 2 arguments
Xah Lee wrote: if i understand correctly, forms such as (lambda x,y:x+y)(a,b) can only be gained thru experience? and not documented directly anywhere in the official docs? The official documentation can't list every possible permutation of the various syntactic constructs. It does explain parenthesis, the lambda expression, and calling syntax; the particular combination of the three that you're using can therefor be logically understood from the docs. -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
Xah Lee wrote: globe=0; def myFun(): globe=globe+1 return globe The short answer is to use the global statement: globe=0 def myFun(): global globe globe=globe+1 return globe more elegant is: globe=0 globe=myfun(globe) def myFun(var): return var+1 and still more elegant is using classes and class attributes instead of global variables. -pu -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
Xah Lee [EMAIL PROTECTED] wrote: is it possible in Python to create a function that maintains a variable value? Yes. There's no concept of a 'static' function variable as such, but there are many other ways to achieve the same thing. globe=0; def myFun(): globe=globe+1 return globe This would work except that you have to tell it explicitly that you're working with a global, otherwise Python sees the globe= and decides you want 'globe' be a local variable. globe= 0 def myFun(): global globe globe= globe+1 return globe Alternatively, wrap the value in a mutable type so you don't have to do an assignment (and can use it in nested scopes): globe= [ 0 ] def myFun(): globe[0]+= 1 return globe[0] A hack you can use to hide statics from code outside the function is to abuse the fact that default parameters are calcuated at define-time: def myFun(globe= [ 0 ]): globe[0]+= 1 return globe[0] For more complicated cases, it might be better to be explicit and use objects: class Counter: def __init__(self): self.globe= 0 def count(self): self.globe+= 1 return self.globe myFun= Counter().count -- Andrew Clover mailto:[EMAIL PROTECTED] http://www.doxdesk.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANN] WConio 1.5 Binary Installer for Python 2.4
Am Sat, 05 Mar 2005 20:33:22 -0600 schrieb Chris Gonnerman: http://newcenturycomputers.net/projects/wconio.html I've done this before: http://www.pythonwiki.de/PythonErweiterungen/WindowsBinaries greets, Marek -- http://mail.python.org/mailman/listinfo/python-list
Re: using python to parse md5sum list
Ben Rf wrote:
I'm new to programming and i'd like to write a program that will parse
a list produced by md5summer and give me a report in a text file on
which md5 sums appear more than once and where they are located.
This should do the trick:
import fileinput
md5s = {}
for line in fileinput.input():
md5, filename = line.rstrip().split()
md5s.setdefault(md5, []).append(filename)
for md5, filenames in md5s.iteritems():
if len(filenames) 1:
print \t.join(filenames)
Put this in md5dups.py and you can then use
md5dups.py [FILE]... to find duplicates in any of the files you
specify. They'll then be printed out as a tab-delimited list.
Key things you might want to look up to understand this:
* the dict datatype
* dict.setdefault()
* dict.iteritems()
* the fileinput module
--
Michael Hoffman
--
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Re: Integer From A Float List?!?
Michael Hoffman wrote: $ py24 -m timeit -s floats = map(float, range(1000)) -sfrom itertools import starmap, izip ints = list(starmap(int, izip(floats))) 1000 loops, best of 3: 343 usec per loop Truly evil. Why is that faster than ints = list(imap(int, floats))? It is on my system. A true performance anomaly. I can see how the lookup for int on every iteration may slow down [int(f) for f in floats] with respect to map(int, floats) -- in fact the listcomp approach becomes faster if you wrap it into a function: def foo(int=int): return [int(f) for f in floats] But where the advantage of the convoluted list(starmap(foo, izip(items)) could come from is a mystery to me. In particular, I would expect the pre-tupling to slow down things -- which it sometimes does: $ py24 -m timeit -st = (1,) -sdef f(a): pass f(*t) 100 loops, best of 3: 0.653 usec per loop $ py24 -m timeit -st = 1 -sdef f(a): pass f(t) 100 loops, best of 3: 0.471 usec per loop and sometimes doesn't: $ py24 -m timeit -st = 1.2 int(t) 100 loops, best of 3: 0.654 usec per loop $ py24 -m timeit -st = (1.2,) int(*t) 100 loops, best of 3: 0.657 usec per loop Peter -- http://mail.python.org/mailman/listinfo/python-list
Adding an option on the fly (Tkinter)
I am making use of a Checkbutton widget. However, I would like to add an option or method on the fly. For example I would like to bind a filename (filename.txt) to a particular Checkbutton widget so that I call it later as: widget[filename] Is this possible to do? Thanks, Harlin -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I import everything in a subdir?
Dfenestr8 [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi. I have a program which I want a plugin directory for. I figured the way to go about that would be to just add a plugin/ dir to sys.path, and import everything in it. Then my program can just execute the main() method of each imported plugin. Is that a good way to go about it? If so, how do I import everything in the plugins dir? The method raises an error as you can see. Read the directory and then use the __import__() method on each entry that ends in .py, .pyc or .pyo. Filter for duplicates first or you may be executing a single plugin more than once. Don't bother with sys.path unless you want your plugins to be able to import from that directory as well. John Roth import sys import os sys.path.append(plugins) ls = os.popen(ls plugins).readlines() for x in ls: ... plugs.append(x[0:x.rfind(.py)]) for x in plugs: ... import x ... Traceback (most recent call last): File stdin, line 2, in ? ImportError: No module named x -- http://mail.python.org/mailman/listinfo/python-list
Re: Can a method in one class change an object in another class?
Here's what I came up with: #objtest.py class first: def __init__(self): a = 'a' self.a = a print self.a def update(self): print 'initially, a is', self.a self.a = second(self.a) print 'afterwards, a is', self.a.call(self.a) class second: def __init__(self, a): pass def call(self, a): a = 'aa' return a if __name__ == '__main__': app = first() app.update() Not sure if this is what you are wanting though. -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding an option on the fly (Tkinter)
Harlin Seritt wrote: I am making use of a Checkbutton widget. However, I would like to add an option or method on the fly. For example I would like to bind a filename (filename.txt) to a particular Checkbutton widget so that I call it later as: widget[filename] Is this possible to do? Yes. Use dicts to store these buttons so that you can later refer to them. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: Can a method in one class change an object in another class?
I've got an app that creates an object in its main class (it also creates a GUI). My problem is that I need to pass this object, a list, to a dialog that is implemented as a second class. I want to edit the contents of that list and then pass back the results to the first class. So my question is, can a method in one class change an object in another class? Sure it can. But your code shows that you suffer from a fundamental misunderstanding on how variables and values work in python. Don't be to worried about that, it happens to quite a few people. A variable in python is just a name refering to an object. So this a = 'a' b = a print a, b a a will make a and b both refer to the string 'a'. Now assigning a different value to b will not affect the binding of a: b = 10 print a, b a 10 So that is the reason you obeserve the behaviour you've seen. Now the question is how to accomplish your desired goal? The answer is simple: don't rebind a value to a name - alter the value! In python, there is a distinction between mutable objects and immutable ones. Strings and numbers are of the latter kind, lists and dicts and objects of the former. So if we changed our example slighly, things start working as you'd expect: a = ['a'] b = a print a,b ['a'] ['a'] b[0] = 10 print a, b [10] [10] So if you pass the same _mutable_ object to two objects, and one of them changes it, the other one will see the changes: class A: def __init__(self): self.a_list = [0] class B: def __init__(self, l): self.l = l def foo(self): self.l.append(100) a = A() b = B(a.a_list) b.foo() print a.a_list - [0, 100] There are some resources on the web that explain this in more thourough detail - but curretntly I have trouble finding them. Search this newsgroup. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: locale support and 4.10
Timothy Smith [EMAIL PROTECTED] writes: something strange is happening, no matter what i try nothing is a supported locale and yes it's freebsd 4.10 AFAIK, the locale support in FreeBSD 4.1 is incomplete. Support for LC_NUMERIC was only added in 4.6 - the release notes for 4.6 say: The locale support was synchronized with the code from FreeBSD -CURRENT. This change brings support for the LC_NUMERIC, LC_MONETARY, and LC_MESSAGES categories, as well as improvements to strftime(3), revised locale definitions, and improvement of the localization of many base system programs. HTH -- Michael Piotrowski, M.A. [EMAIL PROTECTED] Public key at http://www.dynalabs.de/mxp/pubkey.txt -- http://mail.python.org/mailman/listinfo/python-list
tkinter credit card scan
Problem, the focus is on a field which has contents and I scan the credit card card, which is keyboard input. The field is altered and a bunch of chars fly acroos the field. messy. Ok, I can solve this in a very clumsy manner. 1. I see the first character of the scan, '%', configure the field to show ' ' temporarily, do a get() and after the scan is thru, restore the contents. clumsy and messy, but ok. The WORST PROBLEM, is if the previous contents of the field had been selected, which it would be if it is the first field in the payment window or they had tabbed to the field. The the ist char of the scan, the '%' replaces the contents before I can do a get(). Suggestions? -- http://mail.python.org/mailman/listinfo/python-list
Re: function expression with 2 arguments
Actually, lambda forms are quite precisely documented at http://docs.python.org/ref/lambdas.html if you feel than reading the tutorial (specifically http://docs.python.org/tut/node6.html section 4.7.5) is too base for you. -- http://mail.python.org/mailman/listinfo/python-list
Using for... for multiple lists
I am using the following code: for i, f in filelist, self.checkbox: if f.get(): print i I am getting an error: Exception in Tkinter callback Traceback (most recent call last): File C:\Python23\lib\lib-tk\Tkinter.py, line 1345, in __call__ return self.func(*args) File install.py, line 123, in select_stage for i, f in filelist, self.checkbox: ValueError: unpack list of wrong size Both filelist and self.checkbox are the same size (4 items btw). Is there any way to get this done? Thanks, Harlin -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding an option on the fly (Tkinter)
Would I do this like:
buttondict = {button1, name.txt}
??
Thanks,
Harlin
--
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Re: Using for... for multiple lists
Both filelist and self.checkbox are the same size (4 items btw). Is there any way to get this done? Use zip: a, b = [1,2,3], ['a', 'b', 'c'] for i,j in zip(a,b): print i,j Or from itertools izip - which should be slightly more performant and less memory consuming. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: Using for... for multiple lists
On Sunday 06 March 2005 13:09, Harlin Seritt wrote: for i, f in filelist, self.checkbox: if f.get(): print i Use: for i, f in zip(filelist,self.checkbox): bla -- --- Heiko. pgpuQ4Xv4IUj6.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding an option on the fly (Tkinter)
Harlin Seritt wrote:
Would I do this like:
buttondict = {button1, name.txt}
If you want to but I guess the other way round makes more sense. And the
syntax is wrong, its supposed to be
{key : value, ...}
The point is that you can create buttons as much as you want - in a for loop
for example - but usually its important to keep _some_ reference to it so
you can alter it later - e.g. disable it. But you don't _have_ to, if you
don't want to touch it after creation. Something like this might give you
the idea:
cbs = {}
for name in filenames:
# I don't know the real expression for creating a button - but you
should, and this illustrates the idea
cb = check_button(parent, command=lambda name=name: do_something(name))
cbs[name] = cb
Later, in do_something(name), you could e.g. say:
def do_something(name):
cbs[name].config(enabled=False)
Of course this means that cbs has to be a global var. But there exist other
options of course - as part of a object or whatever. that depends on your
code.
--
Regards,
Diez B. Roggisch
--
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Re: Can a method in one class change an object in another class?
On 2005-03-06, Stewart Midwinter [EMAIL PROTECTED] wrote:
I've got an app that creates an object in its main class (it also
creates a GUI). My problem is that I need to pass this object, a
list, to a dialog that is implemented as a second class. I want to
edit the contents of that list and then pass back the results to the
first class. So my question is, can a method in one class change an
object in another class?
If the answer is no, I suppose I could pass in the list as an argument
when I create the second class, then return the contents of the list
when I end the methods in that second class.
alternatively, I could make the list a global variable, then it would
be available to all classes. I have a nagging feeling though that
global variables are to be avoided on general principle. Is this
correct?
Here's a simple example app that tries to have one class change the
object in another class. It doesn't give the behaviour I want,
though.
Depends a bit on who is updating who and which is
created first and which needs references to which.
Maybe like this...
---
#objtest.py
class first:
def __init__(self, a):
self.a = a
print 'a initialized to', self.a
self.updater = second(self)
def update(self, a='aa'):
print 'initially, a is', self.a
self.updater.do_update(a)
print 'afterwards, a is', self.a
class second:
def __init__(self, lst):
self.lst = lst
def do_update(self, a):
self.lst.a = a
if __name__ == '__main__':
lst = first('a')
lst.update()
# or ...
dlg = second(lst)
lst.update('aaa')
--
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Speeding up CGIHTTPServer
Hi, I'm using CGIHTTPServer (via its test() method) to test some CGI on my Windoze 98 box. I find that the execution is very slow. Is there anything I can do to make sure I'm getting the best performance out of CGIHTTPServer? Thanks in advance, Johan Please find our disclaimer at http://www.ukzn.ac.za/disclaimer gwavasig -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP 246 revision
[EMAIL PROTECTED] (Magnus Lie Hetland) wrote in message news:[EMAIL PROTECTED]... In article [EMAIL PROTECTED], [EMAIL PROTECTED] wrote: I had a look at the new reference implementation of PEP 246 (Object Adaptation) and I feel uneasy with one specific point of this new version. I don't fully understand why it checks if *the type of* the protocol has a method __adapt__: ... # (c) then check if protocol.__adapt__ exists likes obj adapt = getattr(type(protocol), '__adapt__', None) ... As a consequence of this change, you can't define a protocol as a class that implements __adapt__ anymore. How about an instance of such a class? class Protocol(object): def __adapt__(self, obj): ... If you instantiate this class, the object's type will have the __adapt__ attribute... This is the way it works with other special methods (i.e. __foo__-methods) in Python, too. Instead of looking in the object (or class) in question, Python checks the *type* of the object (or class). That's the general rule -- no reason to make an exception here. (In fact, there is every reason *not* to make an exception, IMO.) Agreed. Consistency matters. But precisely because Python looks in the type of the object (and not the object itself), I don't need to explicitely check the type myself: the code adapt = getattr(protocol, '__adapt__') will find the method type(protocol).__adapt__ anyway. If it doesn't exist, it will use protocol.__adapt__ instead (right ?). Finally, the code adapt = getattr(protocol, '__adapt__') would work: 1. if protocol is the instance of a class that implements __adapt__, 2. if protocol is a class that implements __adapt__. A good example of why this makes sense is the __call__ method. [...] Agreed. So: The scenario needn't be as complex as in your example, as long as you use instances instead of classes as protocols. (I guess the case could be made for using classes as protocols, but I suspect the case would be mainly syntactical...) Agreed. But I'd like to use the classes directly :) ... and you're right it is mainly a matter of taste. I feel that a class *is* a kind of protocol ... Have you read the BDFL's Python Optional Typechecking Redux ? (http://www.artima.com/weblogs/viewpost.jsp?thread=89161) It's usage of adapt assumes that a class is a protocol, so I guess that it does not work with the new version of PEP 246. Quote: [...] def foo(a: t1, b: t2) - t3: your code here This would be replaced by something like the following: def foo__(a, b): # The original function your code here def foo(a, b): # Typechecking wrapper a = __typecheck__(a, t1) b = __typecheck__(b, t2) r = foo__(a, b) r = __typecheck__(r, t3) return r [...] You can also implement duck typing as defined by adapt(), as follows: from adaptation import adapt def __typecheck__(x, T): if adapt(x, T) is not x: raise TypeError(...) return x Regards, S.B. -- http://mail.python.org/mailman/listinfo/python-list
Re: GOTO (was Re: Appeal for python developers)
Please include "goto" command in future python realeses know that proffesional programers doesn't like to use it, but for me as newbie it's too hard to get used replacing it with "while", "def" or other commands -- I believe the bad reputation of 'goto' goes back to the originators of structured programming and what they meant to say was: don't use goto as a quick fix for a poorly written tangle of looping constructs. It aggravates the tangle when the solution is to straighten it out. Had they deemed 'goto' useless, they would have thrown it out there and then. They didn't, because a policy against misuse that prevents all use runs against the interests of those capable of avoiding the misuse on their own. Typically, elites revolt against dictatorial restrictions. Here, strangely, the elites afflict themselves voluntarily with a sort of gotophobia as a hallmark of professionalism. I had a period when I was into state machines and came up with a programming technique that started out with a state table in three columns. This example is a vending machine. Current state Transition event(s) Next state(s) WAITING FOR ACTION customer drops coin COIN HAS BEEN DROPPED customer selects beverage ORDER RECEIVED customer cancels order ACCOUNT CLOSURE IS DUE else WAITING FOR ACTION COIN HAS BEEN DROPPED identify coincredit account PAYMENT DUE IS UNKNOWN ORDER RECEIVED display selection PAYMENT DUE IS UNKNOWN PAYMENT DUE IS UNKNOWN no selection made NOTHING IS ORDERED payment is short PAYMENT IS SHORT else PAYMENT COVERS NOTHING IS ORDERED prompt for selection WAITING FOR ACTION PAYMENT IS SHORT display balance due prompt for payment WAITING FOR ACTION PAYMENT COVERS prompt for release action WAITING FOR RELEASE ACTION WAITING FOR RELEASE ACTION customer activates release DELIVERY IS DUE customer drops coin COIN HAS BEEN DROPPED customer selects beverage ORDER_RECEIVED customer cancels orderACCOUNT CLOSURE IS DUE else WAITING FOR RELEASE ACTION DELIVERY IS DUE release beverage debit account ACCOUNT CLOSURE IS DUE ACCOUNT CLOSURE IS DUE return account balance WAITING FOR ACTION All of the next states reappear, no more than once each, in the first column as current states and so the table is consistent and exhaustive. Consistency is automatic regardless how big a table grows, if every new next state entered is copied right away into the first column where a bunch of them may accumulate, each one conspicuously unhandled as long as it stands alone on its line. Their order is irrelevant. Converting the table into a program is trivial, because the table is a program. A few minor formal edits make it digestible for a C compiler: WAITING_FOR_ACTION: if customer_drops_coin () goto COIN_HAS_BEEN_DROPPED; if customer_selects_beverage () goto ORDER_RECEIVED; if customer_cancels_order () goto ACCOUNT_CLOSURE_IS_DUE; goto WAITING_FOR_ACTION; COIN_HAS_BEEN_DROPPED: identify_coin (); credit_account (); goto PAYMENT_DUE_IS_UNKNOWN; ORDER_RECEIVED: display_selection ();goto PAYMENT_DUE_IS_UNKNOWN; PAYMENT_DUE_IS_UNKNOWN: if no_selection_made () goto NOTHING_IS_ORDERED; if payment_is_short () goto PAYMENT_IS_SHORT; goto PAYMENT_COVERS; NOTHING_IS_ORDERED: prompt_for_selection ();goto WAITING_FOR_ACTION; PAYMENT_IS_SHORT: display_balance_due (); prompt_for_balance_due ();goto WAITING_FOR_ACTION; PAYMENT_COVERS: prompt_for_release_action ();// goto WAITING_FOR_RELEASE_ACTION; WAITING_FOR_RELEASE_ACTION: if customer_activates_release () goto DELIVERY_IS_DUE; if customer_drops_coin () goto COIN_HAS_BEEN_DROPPED; if customer_selects_beverage () goto ORDER_RECEIVED; if customer_cancels_order () goto ACCOUNT_CLOSURE_IS_DUE; goto WAITING_FOR_RELEASE_ACTION; DELIVERY_IS_DUE: release_beverage (); debit_account (); // goto ACCOUNT_CLOSURE_IS_DUE; ACCOUNT_CLOSURE_IS_DUE: return_account_balance ();goto WAITING_FOR_ACTION; An anachronism? So what? Isn't it simple, elegant, legible, easy to modify and expand and self-documenting on top of it?One advantage of this method is that legibility does not degrade as the complexitiy of the transition paths increases. Conditional loops do become increasingly difficult to follow as they nest and accumulate breaks and state flags, and somodifications become increasingly difficult to make. An upgrade simpler than the following one, on the other hand, is hard to imagine: COIN_HAS_BEEN_DROPPED: identify_coin (); if coin_is_a_dud () goto HOLDING_UNWANTED_PROPERTY; // Newcredit_account (); goto PAYMENT_DUE_IS_UNKNOWN; HOLDING_UNWANTED_PROPERTY: reject_dud (); // New /* admonish_customer (); */ goto WAITING_FOR_ACTION; // New I used this technique in C and found it useful on some occasions. I did not combine gotos and loops.Not all problems lend themselves to this solution,
Re: Question of speed - Flat file DBMS
In message [EMAIL PROTECTED], I.V. Aprameya Rao [EMAIL PROTECTED] writes OK, i forgot to mention this. The speed is a critical issue because there will be a competition and whosever solution is faster wins the prize. Hence will a python solution be as fast as a C++ solution?? aprameya On 4 Mar 2005, John Machin wrote: I.V. Aprameya Rao wrote: Hi I have to implement a flat file dbms. The basic condition is that relations will be given in files and i will have to run certain select project join queries on those relations. Can someone tell me as to which language will be faster, python or C++?? Faster to get a working app released: Python Faster to drive you nuts: C++ Faster processing the files: My hunch is C++, but not by much. After you've shipped your working app (in Python), you'll still have lots of spare time to tweak up the speed -- IF it's slow, if anybody notices, and if anybody cares -- and this newsgroup usually provides a lively response to how do I make this faster questions. The key to speed is disk caching. Unless you're doing a profound amount of computation on your data, I doubt there'll be any significant difference between using Python or C++, except due to how much disk i/o is done by the different programs and language environments. So cache as much as you can- read your entire database into memory if it will fit. If not then try to ensure you can read your entire indices in memory. Create an index for any field you'll be querying on to avoid having to read the entire record. If you're dealing with massive data, think about indices of indices. Work on the data, or at least the indices. in memory. Well, that's everything I ever learned about database design. Regards Ian -- Ian Parker -- http://mail.python.org/mailman/listinfo/python-list
How to script DOS app that doesn't use stdout
There's a DOS console application I am trying to script (in Python), but it doesn't seem to use stdout or stderr... For example, if I redirect output to a file (cmd file.txt), the output still appears on screen. Similarly, the output pipes returned by popen* don't catch the app's output. How might this app be generating its output? Any thoughts on how it could be captured (perhaps with something in the win32 extensions)? Thanks, Greg. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can a method in one class change an object in another class?
Stewart Midwinter wrote: I've got an app that creates an object in its main class (it also creates a GUI). My problem is that I need to pass this object, a list, to a dialog that is implemented as a second class. I want to edit the contents of that list and then pass back the results to the first class. So my question is, can a method in one class change an object in another class? Diez and Lee have shown you two ways to do this. If the answer is no, I suppose I could pass in the list as an argument when I create the second class, then return the contents of the list when I end the methods in that second class. This is almost what your example does, but you have made a small error. See below. alternatively, I could make the list a global variable, then it would be available to all classes. I have a nagging feeling though that global variables are to be avoided on general principle. Is this correct? Yes, it is correct. Here's a simple example app that tries to have one class change the object in another class. It doesn't give the behaviour I want, though. --- #objtest.py class first: def __init__(self): a = 'a' self.a = a print self.a def update(self): print 'initially, a is', self.a self.a = second(self.a) The line above is creating an instance of second and assigning it to self.a. What you want to do is create an instance of second, *call* it, and assign the result to self.a. So you should have self.a = second(self.a)(self.a) The self.a parameter passed to second is never used. If you change second.__init__ to def __init__(self): pass then the call in update() will be self.a = second()(self.a) Kent print 'afterwards, a is', self.a class second: def __init__(self, a): pass def __call__(self, a): a = 'aa' return a if __name__ == '__main__': app = first() app.update() thanks, -- Stewart Midwinter [EMAIL PROTECTED] [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Tough Spawn Problem
By using os.spawn* and the os.P_NOWAIT, the spawn function will return immediately, with the return value being the PID of the new process. Later, you can use os.kill() to force the program to terminate, os.waitpid() to retrieve the exit status if it has terminated, or you could use the signal module to wait for SIGCHLD to be delivered at the time the child terminates. With os.spawn*, the child's open files (including stdin and stdout) are the same as the parent's; using the popen2 module, you can send the program input and capture its output too. Here's the program I ran on Linux (Fedora Core 2 / Python 2.3) to show that os.P_NOWAIT works fine: import os pid = os.spawnv(os.P_NOWAIT, /bin/sh, [sh, -c, sleep 1; echo spawned program]) print child is pid, pid print waitpid result is, os.waitpid(pid, 0) and the output is $ python /tmp/googlemike.py child is pid 13874 spawned program waitpid result is (13874, 0) the fact that spawned program is printed after child is pid N shows that the python program continues executing while the child is working (or, in this case, sleeping). Jeff pgp8mSLDOEMJm.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
Patrick Useldinger wrote: The short answer is to use the global statement: globe=0 def myFun(): global globe globe=globe+1 return globe more elegant is: globe=0 globe=myfun(globe) def myFun(var): return var+1 This mystifies me. What is myfun()? What is var intended to be? Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
and make it a singleton, viz: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52558 http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66531 http://www.python.org/2.2.3/descrintro.html (scroll wayyy down) -- http://mail.python.org/mailman/listinfo/python-list
Re: any Python equivalent of Math::Polynomial::Solve?
|
| Did you perhaps use a list (type(p) == type([])) for p?
|
Alex
Using the coefficients in an array instead of a list
was the key in the solution to my problems
Your other suggestions regarding floating p
and the off-by-one error that I had with the
polynomial degree were also included
The results agree with solutions from PyGSL
as suggested by Pierre Schnizer, but seem
to run just a bit slower on my machine
Thanks again for your assistance
The version that I tested with follows
Stanley C. Kitching
# -
#!/usr/bin/env python
'''
NewsGroup comp.lang.python
Date . 2005-02-27
Subject .. any Python equivalent of Math::Polynomial::Solver
Reply_By . Alex Renelt
Edited_By Stanley c. Kitching
I'm writing a class for polynomial manipulation.
The generalization of the above code
for providing eigenvalues of a polynomial
is
definitions
1.) p = array( [ a_0 , a_i , , a_n ] )
P( x ) = \sum _{ i = 0 } ^n a_i x^i
2.) deg( p ) is its degree
3.) monic( p ) makes P monic
monic( p ) = p / p[ -1 ]
'''
import sys
import time
from numarray import *
import numarray.linear_algebra as LA
print '\n ' , sys.argv[ 0 ] , '\n'
def report( n , this_data ) :
print 'Coefficients ..' , list_coeff[ n ]
print
print 'Roots .'
print
dt , roots = this_data
for this_item in roots :
print '%s' % this_item
print
print 'Elapsed Time %.6f Seconds' % dt
print
print
def roots( p ) :
p = p / float( p[ -1 ] ) # monic( p )
n = len( p ) - 1 # degree of polynomial
z = zeros( ( n , n ) )
M = asarray( z , typecode = 'f8' )# typecode = c16, complex
M[ : -1 , 1 : ] = identity( n - 1 )
M[ -1 , : ] = -p[ : -1 ]
return LA.eigenvalues( M )
list_coeff = [ array( ( 2. , 3. , 1. ) ) ,
array( ( 1. , 3. , 5. , 7. , 9. ) ) ,
array( ( 10. , 8. , 6. , 4. , 2. , 1. , 2. , 4. , 6. ) ) ]
list_roots = [ ]
for these_coeff in list_coeff :
beg = time.time()
rs = roots( these_coeff )
end = time.time()
dt = end - beg
list_roots.append( [ dt , list( rs ) ] )
i = 0
for this_data in list_roots :
report( i , this_data )
i += 1
print
--
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Re: function with a state
Xah Lee wrote: is it possible in Python to create a function that maintains a variable value? something like this: globe=0; def myFun(): globe=globe+1 return globe You could work with function attributes: def myFun(): try:myFun.globe += 1 except: myFun.globe = 1 return myFun.globe or with a default function argument: class Dummy: pass def myFun(globe=Dummy()): try:globe.globe += 1 except: globe.globe = 1 return globe.globe Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Hash of integers for use in Random module
Hi, If I retrieve the hash of an integer, will it always return the same value across platforms? This reason I ask is that I want to produce a sequence of pseudo random numbers using the random module, that I can re-create later on. So I'll need to store the seed value, but Random.seed takes a hashable object rather than an integer directly. Which brings another question to mind. Are hashes of builtin objects in general consistent across platforms, or are they an implementation detail that could change? TIA, Will McGugan -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
Xah Lee [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] globe=0; def myFun(): globe=globe+1 return globe apparently it can't be done like that. I thought it can probably be done by prefixing the variable with some package context... You can do this: globe=0 def myFun(): global globe globe=globe+1 return globe The question you should ask yourself, however, is why you want to do this. Do you really want to tie your function to a single global variable? Are you sure you will never need more than one? For example, the function you've written represents a counter. Are you sure you will never need more than one such counter? -- http://mail.python.org/mailman/listinfo/python-list
Re: Hash of integers for use in Random module
Will McGugan wrote: Hi, If I retrieve the hash of an integer, will it always return the same value across platforms? This reason I ask is that I want to produce a sequence of pseudo random numbers using the random module, that I can re-create later on. So I'll need to store the seed value, but Random.seed takes a hashable object rather than an integer directly. Which brings another question to mind. Are hashes of builtin objects in general consistent across platforms, or are they an implementation detail that could change? *sigh* Didnt read the docs closely enough. It does say that ints and longs are used directly.. Will -- http://mail.python.org/mailman/listinfo/python-list
PyOpenGL issues (glutGetModifiers())
Hi, I'm having some weird issues with Python 2.4 and PyOpenGL 2.0.2.01 (and also with older versions). When I call glutGetModifiers from event handler functions (set using glutMouseFunc, glutMotionFunc etc...), it just says: GLUT: Warning in foo: glutCurrentModifiers: do not call outside core input callback. And the return value is always zero. This problem appeared once I installed PyOpenGL 2.0.2.01. Some older version did work fine otherwise, but crashed if CTRL was pressed during a mouse event. And oh, everything worked just fine with Python 2.3 and some older version of PyOpenGL. I've already run out of ideas, so any help would be greatly appreciated. Thanks. --timof -- http://mail.python.org/mailman/listinfo/python-list
Re: Using for... for multiple lists
If sequences are not same length: zip truncates to length of shortest input sequence map(None, seq1, seq2) pads to length of longest seq. (can't remember what itertools.izip() does) -- http://mail.python.org/mailman/listinfo/python-list
Re: Another math problem...
Sorry, in writing down the problem and the corresponding solution, I made a mistake. It's evident, but anyway... Wrong: # ab * cb = dab 35 * 26 = 936 # + + - + + - # ifd + chg = eaf179 + 258 = 437 # ------ # cih + cge = edd215 + 284 = 499 Correct: # ab * cb = dab 36 * 26 = 936 # + + - + + - # ifd + chg = eaf179 + 258 = 437 # ------ # cih + cge = edd215 + 284 = 499 (wrong 35 correct 36) Bye. -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
I believe python docs are quite *un*-stilted. Modules and packages are not complicated. Read chapter 7 of the nutshell, it's only 10 pages long. 2.3 and 2.4 didn't introduce any fundamental changes in how modules work AFAIK -- http://mail.python.org/mailman/listinfo/python-list
python -i (interactive environment)
When you run python -i scriptname.py after the script completes you left at the interactive command prompt. Is there a way to have this occur from a running program? In other words can I just run scriptname.py (NOT python -i scriptname.py) and inside of scriptname.py I decide that I want to fall back to the interactive prompt? I've searched and so far the only thing I've come up with is to use pdb, but that is not exactly the same as the interactive prompt. Is there any way to do it that I have missed? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Error on xpath-ing a DOM with namespaces
Hello, Via Xpath, I want to access nodes which have a namespace prefix. THe document at hand is an Xsl-FO document. I tried the following: from xml.dom import minidom from xml.xpath import Evaluate from xml import sax parser = sax.make_parser() parser.setFeature(sax.handler.feature_namespaces,1) parser.setFeature(sax.handler.feature_namespace_prefixes,1) doc = minidom.parse(fo-file.xml,parser) #everything ok up to here outlines = Evaluate(//fox:outline,doc.documentElement) I get a RuntimeException in [pythonpath]\Lib\site-packages\_xmlplus\xpath\ParsedNodeTest.py, line 168 because of an undefined namespace fox In the xml document, the namespace fox is defined, e.g. it has been assigned an URL via xmlns:fox. I have installed pyxml 0.83 and 4suite 1.0a3. Since I never had to deal with namespaces before, I have no real idea what to try next. I don't like to use the DOM functions like getElementsByTagNameNS, because xpath is more flexible. Is this error above caused by the employed xml tools, or have I missed something basic about xpath and namespaces in general? Many thanks in advance Piet -- http://mail.python.org/mailman/listinfo/python-list
Coding help...very basic
I need some ideas of how to accomplish this task. I was told that I just need to save the input in a file and make the file searchable, nothing fancy like tying into SQL or Oracle. THis is a basic program and help is greatly appreciated: You've been given an assignment by your supervisor to program a small application to monitor the current status of the cash account in the firm's petty cash fund (the amount of cash kept on hand in the office for incidental purchases). The requirements for the program are to allow users to input the amount of cash deposited, the amount of cash withdrawn and to get a report of the balance at any given time. You will need to also add the date of each deposit and the date of each withdrawal and provide a date with the balance returned upon a given query. The program should be able to provide a printed report and support a command line query. You are to use the object oriented properties of Python to accomplish this task. -- http://mail.python.org/mailman/listinfo/python-list
Re: Question of speed - Flat file DBMS
I.V. Aprameya Rao [EMAIL PROTECTED] wrote: Hi I have to implement a flat file dbms. The basic condition is that relations will be given in files and i will have to run certain select project join queries on those relations. Can someone tell me as to which language will be faster, python or C++?? GDBM. It's already flat file. -- William Park [EMAIL PROTECTED], Toronto, Canada Slackware Linux -- because it works. -- http://mail.python.org/mailman/listinfo/python-list
Re: how to execute Python in VIM
map F12 Esc:!d:\python24\python.exe %CR but it comes with a new pop-up windowsdame~ I'm no windows expert - but maybe pythonw.exe helps here? I find that using pythonw.exe and the silent prefix in Vim works best for me: map F5 Esc:silent !pythonw.exe %CR Regards, Aaron -- http://mail.python.org/mailman/listinfo/python-list
Re: Coding help...very basic
Hi, people here usually tend not to be too helpful when asked to do an obvious homework task. So if you really want help, provide some code you've already written and that has actual problems. Then we're glad to help. But don't expect others to do your work. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: Error on xpath-ing a DOM with namespaces
From http://uche.ogbuji.net/tech/akara/nodes/2003-01-01/basic-xpath
NSS = {u'wsdl': u'http://schemas.xmlsoap.org/wsdl/'}
#processorNss = namespace bindings to be used by the processor
ctx = Context(wsdl_doc, processorNss=NSS)
Evaluate(u'wsdl:description/wsdl:documentation', context=ctx)
Should give you a start.
--
Regards,
Diez B. Roggisch
--
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Re: function with a state
Kent Johnson wrote: globe=0 globe=myfun(globe) def myFun(var): return var+1 This mystifies me. What is myfun()? What is var intended to be? myfun is an error ;-) should be myFun, of course. var is parameter of function myFun. If you call myFun with variable globe, all references to var will be replaced by globe inside function myFun. -pu -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Very simple is you're on UNIX ... You juste have to put at the beginnin of your file : #!/usr/bin/python -i And it juste does what you want :) Pierre Joe a écrit : When you run python -i scriptname.py after the script completes you left at the interactive command prompt. Is there a way to have this occur from a running program? In other words can I just run scriptname.py (NOT python -i scriptname.py) and inside of scriptname.py I decide that I want to fall back to the interactive prompt? I've searched and so far the only thing I've come up with is to use pdb, but that is not exactly the same as the interactive prompt. Is there any way to do it that I have missed? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
Patrick Useldinger wrote: Kent Johnson wrote: globe=0 globe=myfun(globe) def myFun(var): return var+1 This mystifies me. What is myfun()? What is var intended to be? myfun is an error ;-) should be myFun, of course. var is parameter of function myFun. If you call myFun with variable globe, all references to var will be replaced by globe inside function myFun. Oh. I thought there was some deep magic here that I was missing :-) You also have to define myFun before you call it... def myFun(var): return var+1 globe = 0 ... globe = myFun(globe) Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Hi Pierre, Thanks for the reply, but I am not on Unix and it even if I was that solution it does not achieve the desired results. I want the script to decide whether to fall back to the interactive prompt. You solution makes it ALWAYS fall back to the interactive prompt. I want to do something like: try: # execute code except MyExceptionOccurred, except_msg: # fall to interactive prompt. In other words I want to have my program to determine whether the interactive prompt to be displayed or not. Thanks! Pierre Barbier de Reuille [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Very simple is you're on UNIX ... You juste have to put at the beginnin of your file : #!/usr/bin/python -i And it juste does what you want :) Pierre Joe a écrit : When you run python -i scriptname.py after the script completes you left at the interactive command prompt. Is there a way to have this occur from a running program? In other words can I just run scriptname.py (NOT python -i scriptname.py) and inside of scriptname.py I decide that I want to fall back to the interactive prompt? I've searched and so far the only thing I've come up with is to use pdb, but that is not exactly the same as the interactive prompt. Is there any way to do it that I have missed? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: multiple inheritance with builtins
Giovanni Bajo wrote: Hello, I noticed that bultin types like list, set, dict, tuple don't seem to adhere to the convention of using super() in constructor to correctly allow diamond-shaped inheritance (through MRO). For instance: class A(object): ... def __init__(self): ... print A.__init__ ... super(A, self).__init__() ... class B(A, list): ... def __init__(self): ... print B.__init__ ... super(B, self).__init__() ... B.__mro__ (class '__main__.B', class '__main__.A', type 'list', type 'object') B() B.__init__ A.__init__ [] class C(list, A): ... def __init__(self): ... print C.__init__ ... super(C, self).__init__() ... C.__mro__ (class '__main__.C', type 'list', class '__main__.A', type 'object') C() C.__init__ [] It seems weird to me that I have to swap the order of bases to get the expected behaviour. Is there a reason for this, or is it simply a bug that should be fixed? The documentation explicitly states that only one of the built-in types can be used as a base class: they aren't desinged to be mixed with each other. regards Steve -- Meet the Python developers and your c.l.py favorites March 23-25 Come to PyCon DC 2005 http://www.pycon.org/ Steve Holden http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
IndexedCatalog and ZEO
Hello, I'm trying to use IndexedCatalog [http://www.async.com.br/projects/IndexedCatalog/] in my CherryPy [http://www.cherrypy.org] application. As Zodb support access just from one Python thread, I must either use just one CherryPy thread (slow), or use ZEO. However, if I understand it good, when I use from ZEO import ClientStorage then ZEO is internally using FileStorage, so no IndexedCatalog is used. Anyone knews, how to use IndexedCatalog with ZEO, or do I have to patch ZEO for myself (or run this one thread)? Thanks, -- Lukas Almad Linhart [:: http://www.almad.net/ ::] [:: Humans are too complicated to be described with words. ::] [:: PGP/GNUPg key: http://www.almad.net/download/pubkey.asc ::] -- http://mail.python.org/mailman/listinfo/python-list
Re: site-packages versus site-python
msoulier wrote: Well, broadly, the reason is that it allows version-specific code to be included in libraries. I've actually found this to be a bit of a pain. I build packages against say, python2.2, and if you upgrade python to 2.3 the package breaks. The code works fine so saying it requires python = 2.2 should be valid, but the version-specific path prevents that. Mike Well, if you can invent a reliable mechanism for managing version-independent extensions I'm sure the developers will be happy to hear about it :-) regards Steve -- Meet the Python developers and your c.l.py favorites March 23-25 Come to PyCon DC 2005 http://www.pycon.org/ Steve Holden http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Joe wrote: I want the script to decide whether to fall back to the interactive prompt. You solution makes it ALWAYS fall back to the interactive prompt. Actually, using sys.exit() means the program can exit even if python -i is used. You can use: import code code.interact() which emulates the interactive prompt. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
parsing a date string
Hi,
I have a date string in the ctime() format ('Sat Mar 5 10:38:07 2005')
and I want to know how long ago that was in whole days.
So far I have:
import time
import datetime
age =
(datetime.date.fromtimestamp(time.mktime(time.strptime(date.strip( -
datetime.date.today()).days
Which is an absurd number of function calls and is possibly not even
correct (something in the docs about mktime() taking localtime whereas
my string is in UTC)
Any suggestions?
Thanks
MikeG
--
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Re: python -i (interactive environment)
I posted the following a while back. I think this is what you are
looking for.
This can be done fairly easily by creating a module (lets call it
interactive) with the following code in it.
---
import sys,os
def debug_exception(type, value, traceback):
# Restore redirected standard I/O
sys.stdin = sys.__stdin__
sys.stdout = sys.__stdout__
sys.stderr = sys.__stderr__
# Kick the interpreter into interactive mode and call the original
# exception handler.
os.environ['PYTHONINSPECT'] = '1'
sys.__excepthook__(type, value, traceback)
sys.excepthook = debug_exception
---
Now if you import this module and raise an unhandled exception, you will
be in interactive mode. In other words, I think the following script
does what you are asking for.
---
import interactive
raise RuntimeError('Interactive Mode')
---
This also has the advantage that if there are no unhandled exceptions in
your script, the script runs and terminates normally.
Enjoy,
Ray Buvel
Joe wrote:
Hi Pierre,
Thanks for the reply, but I am not on Unix and it even if I was that
solution it does not achieve the desired results.
I want the script to decide whether to fall back to the interactive prompt.
You solution makes it ALWAYS fall back to the interactive prompt.
I want to do something like:
try:
# execute code
except MyExceptionOccurred, except_msg:
# fall to interactive prompt.
In other words I want to have my program to determine whether the
interactive prompt to be displayed or not.
Thanks!
Pierre Barbier de Reuille [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Very simple is you're on UNIX ...
You juste have to put at the beginnin of your file :
#!/usr/bin/python -i
And it juste does what you want :)
Pierre
Joe a écrit :
When you run python -i scriptname.py after the script completes you
left at the interactive command prompt.
Is there a way to have this occur from a running program?
In other words can I just run scriptname.py (NOT python -i scriptname.py)
and inside of scriptname.py I decide that I want to fall back to the
interactive prompt?
I've searched and so far the only thing I've come up with is to use pdb,
but that is not exactly the same as the interactive prompt.
Is there any way to do it that I have missed?
Thanks.
--
http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Joe wrote: When you run python -i scriptname.py after the script completes you left at the interactive command prompt. Is there a way to have this occur from a running program? In other words can I just run scriptname.py (NOT python -i scriptname.py) and inside of scriptname.py I decide that I want to fall back to the interactive prompt? I've searched and so far the only thing I've come up with is to use pdb, but that is not exactly the same as the interactive prompt. Is there any way to do it that I have missed? Thanks. Yes you can set the PYTHONINSPECT environment variable to something other than an empty string from within your program. MikeG -- http://mail.python.org/mailman/listinfo/python-list
A few SWIG/Python questions
I'm using SWIG to generate glue code for my embedded/extended python app. There are a couple of very frustrating issues that I would like to see if anyone else has solutions for: - Once I have created and initialized a module with SWIG I can call it by executing a python file with no problems. However I would like to be able to type in a single-line python function and have it execute from my module. One line cannot contain both import _mypackage and _mypackage.DoFunction(hello) (and even if it could it would be cumbersome). I cannot find a way to manually import (in code) the methods from my package prior to executing the single-line instruction. I can get the dictionary but that doesn't give me the methods. How do I do this? - For some reason whatever name I give the module (via %module name) ends up with an underscore at its beginning - e.g., _name. I don't know why this is, and it was the source of some serious hair-pulling. Is there a way to turn this off (without recompiling the swig executable)? - SWIG in general generates a TON of code for the glue module. Is there a way to reduce this? - SWIG wraps everything with extern C, which is unnecessary for my code and requires me to decorate functions unnecessarily. Is there a way to turn this off? Thanks. -- http://mail.python.org/mailman/listinfo/python-list
seeking tree-browser widget for use with Tkinter
I'm looking for a widget, to be used with Tkinter, that displays a tree whose leaves are strings. I thought there was something like that in the Python Megawidgets, but when I look at the documentation (http://pmw.sourceforge.net/doc/refindex.html), it doesn't seem to be there. Any advice will be much appreciated. Peace, STM -- http://mail.python.org/mailman/listinfo/python-list
Re: seeking tree-browser widget for use with Tkinter
Hi Sean, I downloaded a file called tree.py recently which has this at the top: # Highly optimized Tkinter tree control # by Charles E. Gene Cash email gcash at cfl.rr.com # # This is documented more fully on my homepage at # http://home.cfl.rr.com/genecash/ and if it's not there, look in the Vaults # of Parnassus at http://www.vex.net/parnassus/ which I promise to keep # updated. If you can't find it there I can mail it to you. Stefan On 06.03.2005, at 21:02, Sean McIlroy wrote: I'm looking for a widget, to be used with Tkinter, that displays a tree whose leaves are strings. I thought there was something like that in the Python Megawidgets, but when I look at the documentation (http://pmw.sourceforge.net/doc/refindex.html), it doesn't seem to be there. Any advice will be much appreciated. Peace, STM -- http://mail.python.org/mailman/listinfo/python-list - Two of the most famous products of Berkeley are LSD and Unix. I dont think that this is a coincidence. Anonymous -- http://mail.python.org/mailman/listinfo/python-list
Re: IndexedCatalog and ZEO
Almad wrote:
Hello,
I'm trying to use IndexedCatalog
[http://www.async.com.br/projects/IndexedCatalog/] in my CherryPy
[http://www.cherrypy.org] application.
As Zodb support access just from one Python thread, I must either use just
one CherryPy thread (slow), or use ZEO. However, if I understand it good,
when I use
from ZEO import ClientStorage
then ZEO is internally using FileStorage, so no IndexedCatalog is used.
If you're using IndexedCatalog's Shelf class, just pass it a host/port
tuple instead of a path:
from IndexedCatalog.Shelf import Shelf
shelf = Shelf(('localhost', 1234), [Class1, Class2])
--
http://mail.python.org/mailman/listinfo/python-list
Re: yum install python2.4
[EMAIL PROTECTED] writes: My goal is to install python2.4 using yum (wouldn't you know it, it's a dependency for something else). [...] You're probably better off asking on a yum or Fedora list or newsgroup. John -- http://mail.python.org/mailman/listinfo/python-list
Re: Modifying Call Tips and Intellisense Behavior
[EMAIL PROTECTED] writes: I like the way call tips displays argument variables for functions when you type the ( after the function name. However, if one of the arguments to the function is something like SomeMod.attribute, the intellisense will display all the exposed methods and attributes when SomeMod. is typed. This is fine but once I have selected the desired attribute and continue with entering the next argument, the original call tip for the function I'm working on is lost. I think it would be nice if one could hit a key sequence or something to recall the last call tip. Are there some other python editors that have this type of behavior? If not, where should I start looking to tweak. You haven't said what editor/IDE you're using now. John -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Thanks Michael, that's what I was looking for. Are there any differences between that and the actual interactve prompt that I should be aware of? Would you consider that a better method than using (thanks to those who suggested this other option): import os os.environ['PYTHONINSPECT'] = '1' Michael Hoffman [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Joe wrote: I want the script to decide whether to fall back to the interactive prompt. You solution makes it ALWAYS fall back to the interactive prompt. Actually, using sys.exit() means the program can exit even if python -i is used. You can use: import code code.interact() which emulates the interactive prompt. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: Using for... for multiple lists
Actually the sequences are of the same length. Forgot to mention that. thanks, Harlin -- http://mail.python.org/mailman/listinfo/python-list
Re: seeking tree-browser widget for use with Tkinter
Actually it should be here: http://py.vaults.ca/apyllo.py/808292924.247038364.90387689.96972321 Cheers, Harlin -- http://mail.python.org/mailman/listinfo/python-list
Re: IndexedCatalog and ZEO
I'm trying to use IndexedCatalog [http://www.async.com.br/projects/IndexedCatalog/] in my CherryPy [http://www.cherrypy.org] application. As Zodb support access just from one Python thread, I must either use just one CherryPy thread (slow), or use ZEO. However, if I understand it good, when I use from ZEO import ClientStorage then ZEO is internally using FileStorage, so no IndexedCatalog is used. Anyone knews, how to use IndexedCatalog with ZEO, or do I have to patch ZEO for myself (or run this one thread)? I'm not sure that I fully understand your problem - the usage of IndexedCatalog is IMHO unrelated to threading issues of zodb. And it's not true that zodb supports only one thread. I use it in a multi-threaded environment - as does zope. But it is necessary to use a separate connection object per thread. I've written myself a transaction service alike to the java transaction api that creates a connection for every call made to my server. In conjunction with proxy-objects that keep a unique key for each object, I can happily access zodb concurrently. The basic idea is like this: # open a zodb file storage and store a global reference db = def get_root(): # the module threadlocal is from the cookbook conn = threadlocal.get(connection, None) if conn is None: conn = db.open() threadlocal[connection] = conn return conn.root() class Data(PersistenObject): my data-object. It has a property id that identifies it uniquely ... class DataProxy(object): def __init__(self, id): self.id = id def _g_data(self): return get_root()[self.id] data = property(_g_data) def __getattr__(self, name): return getattr(self.data, name) The magic is in the get_root()-function that fetches a thread-local connection and returns the root-object in my zodb. In my real application, the data-object is cached as long as I'm in one transaction, so multiple attribute accesses are faster. I have to add that I have no expirience with zeo - so maybe that can also solve your problems, but that will result in a local loop network access that also slows down your application. Regarding the usage of IndexedCatalog: It seems you can use it in conjunction with zeo as it has no idea of whatever storage is needed - all it does is indexing zodb objects - which you get from zeo as well. Of course that means that you have to keep a catalog for every thread/process that accesses the objects. Alternatively, you maybe can make the IndexedCatalog a zodb-stored object itself, but I'm not sure about that. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: GOTO (was Re: Appeal for python developers)
Paul McGuire wrote: At the risk of beating this into the Pythonic ground, here is a generator version which collapses the original nested loop into a single loop, so that break works just fine: Indeed. For some things I'm still in the pre-generator days of Python. If I worked at it I think I could come up with an example that wouldn't be so easy to turn into an iterator, but that would be not only be beating it into the ground but doing a clog dance on top. Andrew [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Joe wrote: Are there any differences between that and the actual interactve prompt that I should be aware of? I don't know, unfortunately. Would you consider that a better method than using (thanks to those who suggested this other option): import os os.environ['PYTHONINSPECT'] = '1' Actually I would do that everyone else suggested for your use case. I thought about trying this method but couldn't imagine that it would actually work! -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: Modifying Call Tips and Intellisense Behavior
John J. Lee wrote: [EMAIL PROTECTED] writes: I like the way call tips displays argument variables for functions when you type the ( after the function name. However, if one of the arguments to the function is something like SomeMod.attribute, the intellisense will display all the exposed methods and attributes when SomeMod. is typed. This is fine but once I have selected the desired attribute and continue with entering the next argument, the original call tip for the function I'm working on is lost. I think it would be nice if one could hit a key sequence or something to recall the last call tip. Are there some other python editors that have this type of behavior? If not, where should I start looking to tweak. You haven't said what editor/IDE you're using now. John I'm using Pythonwin editor now but I have also looked at SPE (Stani), PyAlaCarte. I tried to get Eric3 but never could get the Qt stuff to work. All seem to handle calltips and intellisense slightly different but all seem forget the base funcion call tip once another call tip or intellisense is displayed while filling in the arguments. I guess I would like to use the Pythonwin editor but I'm not against other editors if they can be made to work the way I described. -- http://mail.python.org/mailman/listinfo/python-list
Re: seeking tree-browser widget for use with Tkinter
On 6 Mar 2005 12:02:42 -0800, rumours say that [EMAIL PROTECTED] (Sean McIlroy) might have written: I'm looking for a widget, to be used with Tkinter, that displays a tree whose leaves are strings. I thought there was something like that in the Python Megawidgets, but when I look at the documentation (http://pmw.sourceforge.net/doc/refindex.html), it doesn't seem to be there. Any advice will be much appreciated. Have you got Idle on your computer? Search the idlelib directory for the TreeWidget.py file. -- TZOTZIOY, I speak England very best. Be strict when sending and tolerant when receiving. (from RFC1958) I really should keep that in mind when talking with people, actually... -- http://mail.python.org/mailman/listinfo/python-list
Re: using python to parse md5sum list
In [EMAIL PROTECTED], James Stroud wrote: If you are using md5sum, tou can grab the md5 and the filename like such: myfile = open(filename) md5sums = [] for aline in myfile.readlines(): md5sums.append(aline[:-1].split( ,1)) md5sums.append(aline[:-1].split(None, 1)) That works too if md5sum opened the files in binary mode which is the default on Windows. The filename is prefixed with a '*' then, leaving just one space between checksum and filename. myfile.close() Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Michael Hoffman wrote: Joe wrote: Are there any differences between that and the actual interactve prompt that I should be aware of? I don't know, unfortunately. Would you consider that a better method than using (thanks to those who suggested this other option): import os os.environ['PYTHONINSPECT'] = '1' Actually I would do that everyone else suggested for your use case. I thought about trying this method but couldn't imagine that it would actually work! Actually, using this behavior is encouraged by the developers. See this comment in Modules/main.c: /* Check this environment variable at the end, to give programs the * opportunity to set it from Python. */ Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Reinhold, Interesting. A key difference between the two is that PYTHONINSPECT will allow you access to the prompt at the end of your program (assuming no sys.exit or raise SystemExit) but code.interact() allows you to jump into the program at any point. Reinhold Birkenfeld [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] /* Check this environment variable at the end, to give programs the * opportunity to set it from Python. */ Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: Appeal for python developers
Christos TZOTZIOY Georgiou wrote: Argument against your only in you can only use goto: http://www.entrian.com/goto/ That is sick. I'm clearly an amateur at obfuscating Python. Although my implementation is much simpler. ;) -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: Appeal for python developers
Grant Edwards [EMAIL PROTECTED] diagnosed Troll. I first checked my calendar to make sure it wasn't April 1, but some folks just can't wait, can they. And another thought: all this use of alphanumeric characters --- aren't we obfuscating the pure binariness we should all know and love if we want to be one with the CPU? 010010100111010101110011011101100110101001100110101101101001011011100110011100100110011001100110110001101011011100110011 -- http://mail.python.org/mailman/listinfo/python-list
Re: python -i (interactive environment)
Funny you said that, because I didn't even bother trying it because I didn't think it would work either. I figured that python did something internally when it saw the -i switch. Looks like it just checks for it when it's done with your code. One difference between the two methods that I see is that when you set PYTHONINSPECT you don't really have to do anything else and unless sys.exit() or raise SystemExit is used you will get the interactive prompt. Using code.interact you would need to wrap everything in a try/except block and call code.interact from there, or you could invoke it whenever you wanted too. This has the advantage that you can even trap SystemExit if you want too. Thanks again to everyone! Michael Hoffman [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Joe wrote: Actually I would do that everyone else suggested for your use case. I thought about trying this method but couldn't imagine that it would actually work! -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
Xah Lee [EMAIL PROTECTED] writes: the Python doc is quite stilted. Where in the python doc is a programer supposed read about how the package/module system in Python works? (besides the tutorial that touches it) The python docs at URL: http://docs.python.org/ref/naming.html are perfectly clear. It explains the namespaces used when resolving variable names, and how to subvert the standard resolution to solve your problem. mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: Appeal for python developers
On Sat, 05 Mar 2005 14:32:27 +, rumours say that Michael Hoffman [EMAIL PROTECTED] might have written: BOOGIEMAN wrote: Please include goto command in future python realeses As has been said before, you can only use goto in Python if you are using Python with line numbers: http://groups-beta.google.com/group/comp.lang.python/msg/98264a0daa007c46 Argument against your only in you can only use goto: http://www.entrian.com/goto/ The relevant post was (long url): http://groups-beta.google.com/group/comp.lang.python/browse_frm/thread/efe172a98d165a1d/4c504caf72a622a7 -- TZOTZIOY, I speak England very best. Be strict when sending and tolerant when receiving. (from RFC1958) I really should keep that in mind when talking with people, actually... -- http://mail.python.org/mailman/listinfo/python-list
(no subject)
-- http://mail.python.org/mailman/listinfo/python-list
Re: Appeal for python developers
On Sun, 06 Mar 2005 22:52:10 +, rumours say that Michael Hoffman [EMAIL PROTECTED] might have written: Christos TZOTZIOY Georgiou wrote: Argument against your only in you can only use goto: http://www.entrian.com/goto/ That is sick. I'm clearly an amateur at obfuscating Python. Although my implementation is much simpler. ;) Your implementation was a fine hack. Since it seems you didn't know about that joke, please read the whole thread; after the first ha ha nice joke responses, you will notice the surprise of people when we found out that the module was *actually working* :) -- TZOTZIOY, I speak England very best. Be strict when sending and tolerant when receiving. (from RFC1958) I really should keep that in mind when talking with people, actually... -- http://mail.python.org/mailman/listinfo/python-list
Re: Coding help...very basic
Thank both for the help. I understand that I should provide code, I am still trying to understand what to do, I don't want the work done, just some ideas of where to go, a general layout perhaps. Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Coding help...very basic
This is just a basic of what I have so far. The time , a class I will need and the print function. class Account: def __init__(self, initial): self.balance = initial def deposit(self, amt): self.balance = self.balance + amt def withdraw(self,amt): self.balance = self.balance - amt def getbalance(self): return self.balance import time time.asctime() import win32api source_filename = log.txt win32api.ShellExecute ( 0 print source_filename None . 0) -- http://mail.python.org/mailman/listinfo/python-list
[ANNOUNCE] PyKota v1.21 Final is out
Hi there, I'm pleased to announce the availability of PyKota v1.21 Final. PyKota is a Print Quota and Accounting solution for CUPS and LPRng, available from : http://www.librelogiciel.com/software/PyKota/action_Presentation PyKota's original distribution method consists in providing Official tarballs, DEB and RPM packages for a yearly fee of 20 US$ (minimum), while letting everyone download Unofficial versions of this software free of charge by using Subversion (aka svn) PyKota is written in the Python language and published under the terms of the GNU General Public License of the Free Software Foundation. List of changes since 1.20 : - Support Contracts are now available from : http://www.librelogiciel.com/techsupport/ - Third party administration tools like phpPykotaAdmin appeared and begin to be useable. - Simplified installation script. Independant script to check for dependencies. - Integrated pre/post banners (CUPS only). Banners can be either static files, executables, or pipes. PyKota includes a default tool to generate customizable banners on the fly with accounting information. Banners can be accounted for or not, depending on a runtime configuration directive which can be set on a per printer basis if needed. - The data dumper is now also available as a CGI script, and can dump the job history into CUPS' page_log format (even when using LPRng instead of CUPS). This allows real time integration of other tools like phpPrintAnalyzer and the like. - The output of the data dumper is now independant of the database backend being used. This allows third party tools like phpPykotaAdmin to integrate it easily. - Each user can now have an overcharging (or underchaging) factor, used when computing the cost of a print job. - Duplicate jobs can be denied automatically on a per printer basis. - Added an email gateway to allow end users to query their quota information by mail. - The location of the configuration files is now configurable. - Improved security and documentation. - Automated disconnect/reconnect in case of LDAP timeouts. - Added TLS support for LDAP. - Several new configuration directives added, see the sample configuration file for details. - Improved --prototype command line option to edpykota : it can now use most user/group attributes as the prototype for new users/groups. - Improved the internal Page Description Languages parsers. - Turkish and Traditional Chinese translations were added. - Many bug fixes and improvements. - Development moved from CVS to Subversion. - For the first time, three people were given a developer access. NB : The database's structure changed, so don't forget to run the upgrade script if you use PostgreSQL, or to copy the new LDAP schema into your LDAP server's schemas directory if you use LDAP. Many Many thanks to the numerous sponsors of the project, as well as to the following contributors : - Matt Hyclak - Stefan Wold - Baris Cicek - Tsang Yu Pong - Marcus Flávio de Lima - Kanakorn Horsiritham - Wilson Roberto Afonso - Klaus Ade Johnstad - Jurandy Martins - Sergio González González The full list of features is available from : http://www.librelogiciel.com/software/PyKota/action_Features Thank you for reading ! Jerome Alet -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I import everything in a subdir?
Try something like this: for x in plugs: cmd = import %s % x exec (cmd) Dfenestr8 [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi. I have a program which I want a plugin directory for. I figured the way to go about that would be to just add a plugin/ dir to sys.path, and import everything in it. Then my program can just execute the main() method of each imported plugin. Is that a good way to go about it? If so, how do I import everything in the plugins dir? The method raises an error as you can see. import sys import os sys.path.append(plugins) ls = os.popen(ls plugins).readlines() for x in ls: ... plugs.append(x[0:x.rfind(.py)]) for x in plugs: ... import x ... Traceback (most recent call last): File stdin, line 2, in ? ImportError: No module named x -- http://mail.python.org/mailman/listinfo/python-list
python-dev Summary for 2005-02-01 through 2005-02-14
[The HTML version of this Summary is available at
http://www.python.org/dev/summary/2005-02-01_2005-02-14.html]
=
Summary Announcements
=
--
Giving myself a gold watch
--
As some of you may have already heard or read, I am retiring from writing the
python-dev Summaries after sending out the March 16 - 31 summary. It has been
a long time coming and it required a kick in the ass (graciously supplied by
Steve Holden) to finally make me let go of doing this and let someone else take
over.
The joy of the Summaries has dwindled over the 2.5 years I have been doing
this. I was only doing them to be helpful. But now I would rather put my time
and effort I have for Python into coding work rather than the Summaries. I
would like to think I can be more productive and helpful as a programmer than a
writer. And so there will only be three more regular Summaries after this
written by yours truly.
But do not worry about the Summaries dying! When I announced this (see
http://mail.python.org/pipermail/python-dev/2005-March/051823.html for the
thread that led to this), three individuals stepped forward to pick up the work
once I step down. Steven Bethard, Tony Meyer, and Tim Lesher are being
considered for picking up where I left off. There is the possibility that they
will actually write the Summaries together as a team.
As for my last Summary, expect a more expository one with my random thoughts on
PyCon, Python, and anything else that comes to mind that I feel like using this
space to abuse. You have Scott David Daniels to thank for that format idea for
my final hurrah.
Go to PyCon!
I just booked my hotel room for PyCon_. You going to be there so I can shake
your hand, thanking you for supporting Python?
.. _PyCon: http://www.pycon.org/
=
Summaries
=
-
Python Security Response Team founded
-
For those of you who don't know, a security hole was found in XML-RPC servers
in the stdlib that use register_instance; details at
http://www.python.org/security/PSF-2005-001/ .
In response to this, Guido has now formed the 'Python Security Response Team`_.
This group's job is to respond to any and all security issues that come up as
quickly as possible and to issue a patch in a timely fashion.
.. _Python Security Response Team: http://www.python.org/security/
Contributing threads:
- `Wanted: members for Python Security Response Team
http://mail.python.org/pipermail/python-dev/2005-February/051414.html`__
--
Licensing issues in the stdlib
--
It was reported to python-dev that 'profiler' and 'md5 do not conform to the
Debian Free Software Guidelines. The specific issue was derived works using
Python. This is obviously not a good thing.
Things are in the works, though. The hope is to get the copyrights signed over
and all of this cleared up. At worst the modules will be replaced with code
licensed to the Python Software Foundation. If you care to accelerate this by
writing replacements please do so.
Contributing threads:
- `license issues with profiler.py and md5.h/md5c.c
http://mail.python.org/pipermail/python-dev/2005-February/051450.html`__
---
Replacing list of constants with tuple of constants
---
note: written by Tim Lesher
Skip Montanaro noticed that Raymond Hettinger had made a number of
library checkins replacing lists with tuples in constructs like ``for
a in [1, 2, 3]:`` and ``if a in [1, 2, 3]:``. He agreed with the
motivation (the peephole optimizer can convert a tuple of constants
into a single constant, eliminating construction time), but questioned
hardcoding the optimization. Instead, he suggested teaching the
optimizer about throwaway lists in ``for`` and ``if`` statements.
Guido agreed with the sentiment. Raymond accepted the suggestion, and
checked in code to implement it. There were some issues, though, but those
will be covered in the next Summary.
Contributing threads:
- `list of constants - tuple of constants
http://mail.python.org/pipermail/python-dev/2005-February/051442.html`__
---
Complex I/O problem
---
note: written by Tim Lesher
Neal Becker asked why the result of printing a complex number is not an
acceptable input to constructing a complex. For example, ``print
complex(2,2)`` yields ``'(2+2j)'``; but ``complex('(2+2j)')`` throws a
ValueError.
A. M. Kuchling responded that many types, including 'str' and
'file' share this behavior, and that in any event, parsing string
representations is a job more suited to 'eval' than to classes
themselves.
Guido `reiterated the rules`_ for str() (used by 'print') and
repr(). Since both complex.__str__ and
Fork on windows
Hello Guys, I am new to the list and to Python. I have been reading Oreilly's Python book and some web page on child process creation using Python. Basically, on windows, I want to start a process and monitor its stdout and stderror. I have looked at os.py from python lib directory, and it explicitly requires fork to be present to "publish" os.open3 e.g.: AttributeError: 'module' object has no attribute 'open3' if I can't use os.open methods, is there another solution to trigger an exec file and monitor its stdout/stderr? Sorry if the question was asked. I have done several unsuccessful web search to have a definitive answer. Obviously I would like the same code to run on both windows and linux, whenever possible I try to stay away from window specific code, but I fear I might have to do it... ;) Any help is welcome, Tx in advance Dave Lajoie -- http://mail.python.org/mailman/listinfo/python-list
Re: How to script DOS app that doesn't use stdout
Gregor [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] There's a DOS console application I am trying to script (in Python), but it doesn't seem to use stdout or stderr... For example, if I redirect output to a file (cmd file.txt), the output still appears on screen. Similarly, the output pipes returned by popen* don't catch the app's output. How might this app be generating its output? Any thoughts on how it could be captured (perhaps with something in the win32 extensions)? The good-ole DOS app could be doing many things. It could be making BIOS calls or writing directly to the video display memory at segment 0xB800. One would think that if it did a DUP of stdout that it might get captured, but apparently you have tried the popen* family. Any hints as to what the DOS app is? If it is known by anyone, perhaps a workaround is also known. -- http://mail.python.org/mailman/listinfo/python-list
Re: Fork on windows
pls ignore, I got open3 to work, silly mistake on my part... dave. - Original Message - From: Dave Lajoie To: Python-list@python.org Sent: Sunday, March 06, 2005 10:32 PM Subject: Fork on windows Hello Guys, I am new to the list and to Python. I have been reading Oreilly's Python book and some web page on child process creation using Python. Basically, on windows, I want to start a process and monitor its stdout and stderror. I have looked at os.py from python lib directory, and it explicitly requires fork to be present to "publish" os.open3 e.g.: AttributeError: 'module' object has no attribute 'open3' if I can't use os.open methods, is there another solution to trigger an exec file and monitor its stdout/stderr? Sorry if the question was asked. I have done several unsuccessful web search to have a definitive answer. Obviously I would like the same code to run on both windows and linux, whenever possible I try to stay away from window specific code, but I fear I might have to do it... ;) Any help is welcome, Tx in advance Dave Lajoie -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: io.h include file in pyconfig.h
Thanks. How do I verify what RPMs I need? I checked with rpm -qa | python, it only showed the python package. After I included the /usr/include/sys/io.h in the source package INCLUDE path, it seemed like the compilation went into a include loop. (/usr/include/sys/unisted.h:1:10 #include nested too deeply) -- http://mail.python.org/mailman/listinfo/python-list
Re: locale support and 4.10
On Sat, 05 Mar 2005 15:42:23 +1000, Timothy Smith
[EMAIL PROTECTED] wrote:
i'm trying to setlocale() on 4.10, and it appears the python package
doesn't support this under 4.10.
Python 2.3.3 (#2, Apr 28 2004, 22:48:37)
[GCC 2.95.4 20020320 [FreeBSD]] on freebsd4
Type help, copyright, credits or license for more information.
import locale
locale.setlocale(locale.LC_NUMERIC, 'us')
Traceback (most recent call last):
File stdin, line 1, in ?
File /usr/local/lib/python2.3/locale.py, line 381, in setlocale
return _setlocale(category, locale)
locale.Error: unsupported locale setting
the exact same thing works under windows xp.
do i have to compile it with locale support?
import locale
locale.setlocale(locale.LC_NUMERIC, 'us')
Traceback (most recent call last):
File stdin, line 1, in ?
File /usr/local/lib/python2.2/locale.py, line 372, in setlocale
return _setlocale(category, locale)
locale.Error: locale setting not supported
locale.setlocale(locale.LC_NUMERIC, 'en_US.ISO8859-1')
'en_US.ISO8859-1'
locale.format('%g', 12.34)
'12.34'
locale.setlocale(locale.LC_NUMERIC, 'fr_FR.ISO8859-1')
'fr_FR.ISO8859-1'
locale.format('%g', 12.34)
'12,34'
You must specify exact locale name in FreeBSD.
eg) en_US.ISO8859-1 en_US.ISO8859-15 or etc.
Hye-Shik
--
http://mail.python.org/mailman/listinfo/python-list
Possible to import a module whose name is contained in a variable?
Hi, I want to do something like the following, which doesn't work: modulename = 'module' import modulename The error is that there is no module named 'modulename'. Is there a way to get that variable expanded? Regards, Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Possible to import a module whose name is contained in a variable?
On 6 Mar 2005 21:34:08 -0800, Steven Reddie [EMAIL PROTECTED] wrote: Hi, I want to do something like the following, which doesn't work: modulename = 'module' import modulename The error is that there is no module named 'modulename'. Is there a way to get that variable expanded? modulename = 'module' module = __import__(modulename) Hye-Shik -- http://mail.python.org/mailman/listinfo/python-list
RE: Possible to import a module whose name is contained in a variable?
Hi,
Thanks, that seems to be what I was missing. I'm having some further
related trouble though. I want to do something like this:
MODULES = [ 'module1', 'module2' ]
def libinfo():
for m in MODULES:
__import__('libinfo.'+m)
m.libinfo()
CFLAGS+=m.CFLAGS
That is, effectively expanding out to:
def libinfo():
__import__('libinfo.module1')
module1.libinfo()
CFLAGS+=module1.CFLAGS
I think the m in m.libinfo() is a string and so there is a failure to find
a libinfo member of a string object (which makes sense). Is there some way
to call the libinfo member of the object named by m? Am I heading into
reflection territory?
Regards,
Steven
-Original Message-
From: Hye-Shik Chang [mailto:[EMAIL PROTECTED]
Sent: Monday, 7 March 2005 4:48 PM
To: Steven Reddie
Cc: python-list@python.org
Subject: Re: Possible to import a module whose name is contained in a
variable?
On 6 Mar 2005 21:34:08 -0800, Steven Reddie [EMAIL PROTECTED] wrote:
Hi,
I want to do something like the following, which doesn't work:
modulename = 'module'
import modulename
The error is that there is no module named 'modulename'. Is there a
way to get that variable expanded?
modulename = 'module'
module = __import__(modulename)
Hye-Shik
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Re: How do I import everything in a subdir?
YL wrote: Try something like this: for x in plugs: cmd = import %s % x exec (cmd) For the sake of others who might have missed the rest of this thread, I'll point out that this is definitely not the way to go. No need to use exec when the builtin __import__ function is already defined for exactly this sort of use. STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: function with a state
On Sun, 06 Mar 2005 09:44:41 +0100, Patrick Useldinger [EMAIL PROTECTED] wrote: Xah Lee wrote: globe=0; def myFun(): globe=globe+1 return globe The short answer is to use the global statement: globe=0 def myFun(): global globe globe=globe+1 return globe more elegant is: globe=0 globe=myfun(globe) def myFun(var): return var+1 and still more elegant is using classes and class attributes instead of global variables. Or what about just using the function object directly? def myFun(): myFun.x += 1 return myFun.x myFun.x = 0 for test in range(10): assert myFun()+1 == myFun() assert myFun()*2+3 == myFun()+myFun() assert range(myFun(), myFun()+9) == [myFun() for x in range(10)] assert range(myFun()+2, myFun()+11) == [myFun() for x in range(10)] :)) couldn't-help-feeding-the-troll-ly-y'rs. Stephen Thorne. -- http://mail.python.org/mailman/listinfo/python-list
