Hi all,
I used to by a big Python fan, many years ago [1]. I stopped using it
after discovering REALbasic, because my main developmental need is to
write desktop applications that are as native as possible on each
platform, and because I really like a strongly-typed language with a
good
I'm trying to use py2app to convert the pySketch wxPython example into
a stand-alone OS X app. I've found the documentation at http://undefined.org/python/py2app.html
, but it wasn't terribly enlightening for me. My setup.py looks
like this:
#!/usr/bin/env python
setup.py - script for
I'm just re-learning Python after nearly a decade away. I've learned
a good healthy paranoia about my code in that time, and so one thing
I'd like to add to my Python habits is a way to both (a) make intended
types clear to the human reader of the code, in a uniform manner; and
(b) catch
On Oct 7, 2008, at 8:43 AM, Benjamin Kaplan wrote:
I believe that all (or nearly all) Unix variants come with Python
preinstalled. Ubuntu, at least, has a lot of system programs written
in Python. Even Mac OS X requires Python.
Yes, but with significant differences between different Python
We have a client who's paranoid about distributing the Python source
to his commercial app. Is there some way I can distribute and use
just the .pyc files, so as to not give away the source?
Thanks,
- Joe
--
http://mail.python.org/mailman/listinfo/python-list
On Oct 9, 2008, at 7:05 AM, [EMAIL PROTECTED] wrote:
Tino
http://docs.python.org/library/stdtypes.html#string-formatting-operations
That shows how to use the template formatting as it currently
exists. To my
knowledge there is no support for the inverse operation, which is
what Joe
Catching up on what's new in Python since I last used it a decade ago,
I've just been reading up on template strings. These are pretty
cool! However, just as a template string has some advantages over %
substitution for building a string, it seems like it would have
advantages over
Wow, this was harder than I thought (at least for a rusty Pythoneer
like myself). Here's my stab at an implementation. Remember, the
goal is to add a match method to Template which works like
Template.substitute, but in reverse: given a string, if that string
matches the template, then
I'm trying to (gently) convince my business partner that we should be
adding Python to our core toolset. He's never used it before, apart
from poking around in the tutorial a bit at my urging. But he's got a
birthday coming up, and I'd like to get him a book that will help him
make the
I would like to propose a new method for the string.Template class.
What's the proper procedure for doing this? I've joined the python-
ideas list, but that seems to be only for proposed language changes,
and my idea doesn't require any change to the language at all.
From
On Oct 13, 2008, at 2:43 PM, Benjamin Kaplan wrote:
I mean what happens when you type help() into the interactive
console on the command line? You will see the docstrings, and there
will be a whole bunch of random hex characters there.
Good point. It might be better put in a
We need to set up a content management system that allows nontechnical
users to manage the content of their web site. Rather than starting
from scratch, I'd prefer to start with an existing CMS that we can
extend as needed. So, I'd prefer something with nice clean, easy-to-
follow code
We've got a client who has been planning to use SharePoint for
managing their organization documents, but has recently dropped that
idea and is looking for an alternative. Is there any Python package
with similar functionality?
I confess that I've never used SharePoint myself, and what I
On Oct 15, 2008, at 2:47 PM, Ben Finney wrote:
Because of the inescapable central role in our craft of manipulating
text files, essential in this development environment is a
highly-customisable text editor with a broad *and* deep library of
existing customisations, to maximise the amount of
On Oct 16, 2008, at 10:59 AM, Larry Bates wrote:
how do i find that the name is 'bob'
Short answer is that you can't. This because Python's names (bob)
are bound to objects (modulename.objectname()). They are NOT
variables as they are in other programming languages.
Which other
On Oct 16, 2008, at 7:30 PM, Steven D'Aprano wrote:
However, 'bob' here really is a variable. It's a variable whose
value
(at the moment) is a reference to some object.
Traditionally, a variable is a named memory location.
Agreed.
The main objection I have to using variable to describe
On Oct 16, 2008, at 11:23 PM, Dennis Lee Bieber wrote:
On Thu, 16 Oct 2008 21:19:28 -0600, Joe Strout [EMAIL PROTECTED]
declaimed the following in comp.lang.python:
Now that IS mysterious. Doesn't calling a function add a frame to a
stack? And doesn't that necessitate copying in values
On Oct 17, 2008, at 10:00 AM, coldpizza wrote:
http://stackoverflow.com/questions/101268/hidden-features-of-python
Thanks, there are a lot of useful nuggets there. However, can anybody
explain the Main messages one? It doesn't include any explanatory
text at all, just a code snippet:
On Oct 17, 2008, at 10:35 AM, coldpizza wrote:
If you are using and IDE, such as Eclipse, PyScripter, etc, then CTR
+click on 'this' should do the trick.
In ipython you can do 'import this' and then type 'this??' Or if you
are *not* lazy, you could try locating the file in the Python tree.
On Oct 17, 2008, at 11:24 AM, Marc 'BlackJack' Rintsch wrote:
kw = 'генских'
What do you mean by does not work? And you are aware that the above
snipped doesn't involve any unicode characters!? You have a byte
string
there -- type `str` not `unicode`.
Just checking my understanding
On Oct 17, 2008, at 1:03 PM, Aaron Castironpi Brady wrote:
I'm not fluent in Java so you'll have to be the judge.
In Python:
b= 0
f( b )
No matter what, b == 0. C doesn't guarantee this.
It does, unless f's parameter has been declared a reference
parameter. (In C++, you'd do this with
Thanks for the answers. That clears things up quite a bit.
What if your source file is set to utf-8? Do you then have a proper
UTF-8 string, but the problem is that none of the standard Python
library methods know how to properly interpret UTF-8?
Well, the decode method knows how to decode
On Oct 17, 2008, at 2:36 PM, Steve Holden wrote:
No, a by ref parameter would mean that this:
def foo(ByRef x):
x = x + [42]
a = [1,2,3]
foo(a)
...would result in a = [1,2,3,42].
In [8]: def foo(x):
...: x += [42]
...:
In [9]: a = [1, 2, 3]
In [10]: foo(a)
In [11]: a
Out[11]:
On Oct 17, 2008, at 3:19 PM, Grant Edwards wrote:
And my real point is that this is exactly the same as in every
other modern language.
No, it isn't. In many other languages (C, Pascal, etc.), a
variable is commonly thought of as a fixed location in memory
into which one can put values.
On Oct 18, 2008, at 1:20 AM, Martin v. Löwis wrote:
Do you then have a proper UTF-8 string,
but the problem is that none of the standard Python library methods
know
how to properly interpret UTF-8?
There is (probably) no such thing as a proper UTF-8 string (in the
sense in which you
On Oct 21, 2008, at 2:39 PM, Martin v. Löwis wrote:
It's not possible to fix this - it isn't even broken. The *db
modules,
by design, support storing of arbitrary bytes, not just character
data.
Many database engines are encoding-aware, and distinguish between
'text' columns and 'blob'
On Oct 22, 2008, at 10:00 PM, Steven D'Aprano wrote:
It would have been easy to avoid this: just copy the relevant bits of
the / directory hierarchy in the user's home directory. Global
settings
go in /etc and per user settings go in ~/etc. Global temp files go
into /
tmp and per user temp
On Oct 23, 2008, at 11:50 AM, Stef Mientki wrote:
gui_support is library for easy creation of GUI designs in wxPython.
...
Brief documentation can be found here
http://oase.uci.kun.nl/~mientki/data_www/pylab_works/pw_gui_support.html
That's neat -- thank you for making it available. I've
On Oct 27, 2008, at 12:19 PM, [EMAIL PROTECTED] wrote:
I think this uncontrived example addresses the C/Python difference
fairly directly (both were tested):
That's correct, but of course, C is a decades-old language barely a
step above assembler. For a fair comparison, pick any modern OOP
On Oct 28, 2008, at 8:41 AM, Shannon Mayne wrote:
I would like to create objects with algorithmically determined names
based on other object names and use object names for general algorithm
input.
What do you mean by the name of an object? Objects don't generally
have names, unless you
On Oct 27, 2008, at 11:28 PM, Gabriel Genellina wrote:
En Tue, 28 Oct 2008 00:58:10 -0200, greg
[EMAIL PROTECTED] escribió:
Let's look at the definitions of the terms:
(1) Call by value: The actual parameter is an expression. It is
evaluated and the result is assigned to the formal
I've tried to write up this topic in a clear, step-by-step manner,
with the help of diagrams and short examples from several different
OOP languages. I hope it will help clear up the confusion that seems
to be pervading the Python community (and which is far more rare in
the other
On Oct 28, 2008, at 4:45 PM, Steven D'Aprano wrote:
What do you mean by the name of an object? Objects don't generally
have names, unless you explicitly define a .name property and assign
them names.
(Variables have names, of course, but a variable isn't an object --
it's
just a reference
On Oct 28, 2008, at 6:58 PM, Steve Holden wrote:
Objects in Python *don't* have names. Period. In Python we don't
normally talk about variables anyway, except when speaking loosely, we
talk about binding names. But please don't let this start another
round
of Python programmers don't know
On Oct 29, 2008, at 4:52 PM, Fuzzyman wrote:
You're pretty straightforwardly wrong. In Python the 'value' of a
variable is not the reference itself.
That's the misconception that is leading some folks around here into
tangled nots of twisty mislogic, ultimately causing them to make up
new
On Oct 30, 2008, at 7:56 AM, Dale Roberts wrote:
That's the misconception that is leading some folks around here into
tangled nots of twisty mislogic, ultimately causing them to make up
new terms for what every other modern language is perfectly happy
calling Call-By-Value.
Doesn't this logic
On Oct 30, 2008, at 8:55 AM, Grant Edwards wrote:
The question you might want to asked is whether the parameter
is a single string or a sequence of strings. That way your
code will also work with an iterator that returns strings.
type('asdf') is str
True
I agree with the general approach,
On Oct 30, 2008, at 6:38 PM, greg wrote:
The distinction isn't about parameter passing, though, it's
about the semantics of *assignment*. Once you understand
how assigment works in Python, all you need to know then
is that parameters are passed by assigning the actual
parameter to the formal
On Oct 30, 2008, at 6:58 PM, greg wrote:
For what it's worth, I happen to agree that telling
someone that Python passes parameters by value without
being sure they understand exactly what by value
means, is not a good idea -- not because the term
isn't well-defined, but because of the
I love doctest -- the way it combines documentation with verification
seems elegant and useful, and most of the time it's simple and easy to
use.
But I've run into a bit of a snag trying to test a method that returns
a dictionary, because (of course) the order in which the dictionary
On Nov 3, 2008, at 12:00 PM, Aaron Brady wrote:
I think we can conclude that Python passes by reference, since a
function can modify objects that were passed in to it.
Then please write the Python equivalent of the Swap methods shown at
http://www.strout.net/info/coding/valref/ (or at
On Nov 3, 2008, at 2:36 PM, Aaron Brady wrote:
Then please write the Python equivalent of the Swap methods shown
at
http://www.strout.net/info/coding/valref/ (or at http://javadude.com/articles/passbyvalue.htm
, for that matter).
And no fair wrapping the two parameters up in an object or
On Nov 3, 2008, at 4:38 PM, Paulo J. Matos wrote:
However, I wouldn't dare to say Python needs structures to be a good
language, or anything similar. My question was more directed to : if
there aren't structures in Python, what do Pythonists use instead?
Classes.
Best,
- Joe
--
On Nov 3, 2008, at 5:27 PM, Marc 'BlackJack' Rintsch wrote:
Maybe this is a surprise for you, because we haven't discussed this in
much detail in this group lately, but it applies to Python which does
call-by-object or call-by-sharing. ;-)
There's no such thing. Those are just terms made up
We've got a need to generate short samples of songs that are in MIDI
format, to provide a preview function in a web app. We'd like to do
something more clever than just taking the middle 20 seconds (or
whatever) of the song -- ideally, we'd like to find the chorus, since
that's likely to
On Nov 3, 2008, at 10:53 PM, 3000 billg wrote:
I am a leaner. for your experience. Which GUI Lib will be the best
for Python? wxpython, Tkinter or...
I'm sure you'll get as many opinions on this as there are libraries.
However, I recently faced the same choice, and settled on wxPython.
On Nov 4, 2008, at 7:42 AM, Craig Allen wrote:
coming from C/C++ Python seemed to me call by reference, for the
pragmatic reason you said, modificaitons to function arguments do
affect the variable in the caller. The confusing part of this then
comes when immutable objects are passed in.
On Nov 4, 2008, at 10:33 AM, Michael Torrie wrote:
Are there any good books on python and objc? I doubt you'll be able
to
make any decent iPhone apps without having a good working knowledge of
Objective C and the python-objc bridge. In my mind that's one of the
cool parts of doing cocoa
On Nov 4, 2008, at 3:42 PM, Steven D'Aprano wrote:
This example is also call-by-value, but the value in this case is a
type
that has no analog in Python.
I'm disappointed to see that my prediction that Joe would, yet again,
utterly ignore all the arguments against his pet theory was
On Nov 4, 2008, at 3:54 PM, Steven D'Aprano wrote:
At the level of Python code, Python operates on *objects*. When you
call
a function with an argument, the argument (an object) is NOT copied,
it
is passed to the function. If you mutate the argument inside the
function, you are changing the
On Nov 5, 2008, at 12:29 AM, Dennis Lee Bieber wrote:
C++:
void foo(PersonPtr who) {
who-zipcode = 12345;
}
Please show us the type definition of PersonPtr
Sorry, that'd be obvious to anyone experienced in C++, but I shouldn't
assume. It would be:
typedef Person*
On Nov 4, 2008, at 12:57 PM, Hendrik van Rooyen wrote:
4. You now see how a mutating an object within a function tells you
NOTHING about how the reference to that object was passed.
5. You see that the first three languages above are passing a
reference by value and using that to mutate and
On Nov 5, 2008, at 2:06 PM, Lie wrote:
http://www.strout.net/info/coding/valref/
I'm fed up with you.
I'm sorry -- I'm really not trying to be difficult. And it's odd that
you're fed up with me, yet you seem to be agreeing with me on at least
most points.
In Von Neumann Architecture
On Nov 6, 2008, at 12:44 PM, Arnaud Delobelle wrote:
I know this thread has grown quite personal for some of its
participants. I am posting in a spirit of peace and understanding :)
Thanks, I'll do the same.
Um, no, I've admitted that it's a reference all along. Indeed,
that's
pretty
First, I want to thank everyone for your patience -- I think we're
making progress towards a consensus.
On Nov 6, 2008, at 8:48 PM, Steven D'Aprano wrote:
that's
pretty much the whole point: that variables in Python don't contain
objects, but merely contain references to objects that are
On Nov 6, 2008, at 10:35 PM, Steve Holden wrote:
That's good to hear. Your arguments are sometimes pretty good, and
usually well made, but there's been far too much insistence on all
sides
about being right and not enough on reaching agreement about how
Python's well-defined semantics for
On Nov 7, 2008, at 10:29 AM, Steven D'Aprano wrote:
Note: I tried to say name above instead of variable but I
couldn't
bring myself to do it -- name seems to generic to do that job.
Lots
of things have names that are not variables: modules have names,
classes
have names, methods have
On Nov 7, 2008, at 12:13 PM, Terry Reedy wrote:
Python has two types of names. Some complex objects -- modules,
classes, and functions, and wrappers and subclasses thereof, have
'definition names' that are used instead of a 'value' to print a
representation. Otherwise, names are
On Nov 7, 2008, at 12:35 PM, Terry Reedy wrote:
http://en.wikipedia.org/wiki/Call_by_something#Call_by_sharing
Call by sharing
Also known as call by object or call by object-sharing is an
evaluation strategy first named by Barbara Liskov et al for the
language CLU in 1974[1]. It is used
On Nov 7, 2008, at 6:21 PM, Aaron Brady wrote:
Therefore objects don't need names to exist. Having a name is
sufficient but not necessary to exist. Being in a container is
neither necessary -nor- sufficient.
What do you mean? Being in a container isn't necessary, but it
certainly is
On Nov 8, 2008, at 2:38 PM, Terry Reedy wrote:
So if you then insist that Python uses call by object,
you're actually saying it uses call by value!
Both Joe and you seem to be engaging in the following bit of
sophistry:
In order for code A to call code B, some information must be
Is there any Python-based fish simulation project? I've tried
searching google and pypi, but no luck. No burning need, just seems
like it'd be fun.
Thanks,
- Joe
--
http://mail.python.org/mailman/listinfo/python-list
On Nov 10, 2008, at 8:30 AM, Terry Reedy wrote:
That hinges on what exactly is meant by changes to
the arguments.
Mutating them, like Python does, which is why calling Python CBV
leads people to write buggy code.
In Python it can only mean assigning
directly to the bare name -- anything
On Nov 10, 2008, at 2:30 PM, Aaron Brady wrote:
I agree with Terry that all calling is call-by-value, and Steven that
all calling is call-by-bit-flipping. I agree with Joe that call-by-
object is a special case of call-by-value.
Woo! Almost sounds like approaching consensus. :)
However,
On Nov 10, 2008, at 2:44 PM, Zane Selvans wrote:
However, one (and only one) of these instance variables is behaving
mysteriously like a class variable: all instances of the class are
sharing a single copy of the variable, located at the same place in
memory.
Is there a common mistake
I've been using docstring to exercise each of my modules, with code
like this:
def _test():
import doctest
doctest.testmod()
if __name__ == __main__:
_test()
This works great when I execute each module by itself. However, if I
want to call mymodule._test() from
Some corrections, to highlight the depth of my confusion...
On Nov 11, 2008, at 9:10 PM, Joe Strout wrote:
doctest.testmod(mymodule)
This actually works fine if I'm importing the module (with the
standard name) somewhere else
Actually, it does not.
I noticed that a function
On Nov 11, 2008, at 9:49 PM, Rafe wrote:
I'm sure there is a magic identifier somewhere that lets a code get
a reference to its own module, but I haven't been able to find it.
import sys
this_module = sys.modules[__name__]
Beautiful! Thanks very much. For the archives, here is my standard
On Nov 12, 2008, at 10:45 AM, Tim Rowe wrote:
What do you actually mean by Quacks like a string? Supports the
'count()' method? Then you find out if it doesn't when you try to
apply the 'count()' method. Supports some method that you don't
actually use? Then why do you care?
Because if I
On Nov 12, 2008, at 11:48 AM, [EMAIL PROTECTED] wrote:
It seems to me that what you are describing is exactly what abcs were
added for in 2.6, in particular registration:
class AnotherClass(metaclass=ABCMeta):
pass
AnotherClass.register(basestring)
assert isinstance(str, AnotherClass)
Let me preface this by saying that I think I get the concept of duck-
typing.
However, I still want to sprinkle my code with assertions that, for
example, my parameters are what they're supposed to be -- too often I
mistakenly pass in something I didn't intend, and when that happens, I
On Nov 12, 2008, at 2:42 PM, Tim Rowe wrote:
And then the original class definition changes -- new members added --
but the ones from the factory class don't change, and so are no longer
compliant with the the factory class (which doesn't support the new
On Nov 12, 2008, at 7:32 PM, Steven D'Aprano wrote:
I'm surprised nobody has pointed you at Alex Martelli's recipe here:
http://code.activestate.com/recipes/52291/
Thanks for that -- it's clever how he combines binding the methods
he'll use with doing the checking.
While the recipe is
One thing I miss as I move from REALbasic to Python is the ability to
have static storage within a method -- i.e. storage that is persistent
between calls, but not visible outside the method. I frequently use
this for such things as caching, or for keeping track of how many
objects a
On Nov 13, 2008, at 10:19 AM, Chris Mellon wrote:
Static storage is a way of preserving state. Objects are a way of
encapsulating state and behavior. Use an object.
Argh. I've been back in the Python community for about a month, and
I've been continually amazed at how every single how do I
Steve wrote:
This is a pretty bizarre requirement, IMHO. The normal place to keep
such information is either class variables or instance variables.
Holy cow, I thought it was just Chris, but there were half a dozen
similar responses after that.
I'm starting to see a pattern here... any
On Nov 13, 2008, at 11:15 AM, J. Cliff Dyer wrote:
Here are a few essays into the matter
def foo():
... foo._count += 1
... return (spam * foo.count).rstrip()
Simple and straightforward, and _count is still encapsulated in the
function, but it's kind of ugly, because when the
Hi Luis,
A lot of languages have ditched the concept of a static variable
on a method (how do
you parse that sentence, btw?) in favour of using encapsulation.
A static variable IS encapsulation. Encapsulation happens at many
levels: module, class, instance, and (in languages that support
On Nov 13, 2008, at 3:23 PM, Arnaud Delobelle wrote:
Aaron Brady [EMAIL PROTECTED] writes:
One way around it, which I like the idea of but I'll be honest, I've
never used, is getting a function a 'self' parameter. You could make
it a dictionary or a blank container object, or just the
On Nov 13, 2008, at 8:26 PM, Steven D'Aprano wrote:
def spam(_count=[0]):
_count[0] += 1
return spam * _count[0]
This is a common trick, often used for things like caching. One major
advantage is that you are exposing the cache as an *optional* part
of the
interface, which makes
On Nov 14, 2008, at 12:27 PM, [EMAIL PROTECTED] wrote:
What would be actually interesting would be an switch to the python
interpreter that internally annotated function parameters with how
they are used in the function and raised an exception as soon as the
function is called instead of later.
On Nov 14, 2008, at 2:07 PM, Paul McGuire wrote:
Or to be even more thorough:
def sub(x: must have getitem, y: must have strip and strip must be
callable, and y.strip must return something that has replace and
replace must be callable)
So even this simple example gets nasty in a hurry, let
On Nov 14, 2008, at 4:33 PM, Jerry Hill wrote:
Then add
def __init__(self):
a = 0
b = 0
to your box class to make a and b instance variables.
Doesn't that have to be self.a and self.b?
Best,
- Joe
--
http://mail.python.org/mailman/listinfo/python-list
On Nov 17, 2008, at 10:47 AM, Mark wrote:
I used pickle and found the file was saved in text format. I wonder
whether anyone is familiar with a good compact off-the-shelf module
available that will save in compressed format... or maybe an opinion
on a smart approach for making a custom one?
On Nov 17, 2008, at 10:53 AM, Eric wrote:
My son has an idea for a program to
write. Basically he would like to present a window with a small circle
on it. The window title would have the instruction to click on the
circle. As the mouse approaches the circle, it moves away from the
spot. Being
On Nov 17, 2008, at 4:06 PM, Gabriel Genellina wrote:
I don't feel anybody would improve their Python skills chasing what
the value of an object is, least to make contortions so some
arbitrary definition of call by value be applicable to the language.
Actually, contortions are required to
On Nov 19, 2008, at 11:05 AM, Douglas Alan wrote:
Personally, I find this whole debate kind of silly, as it is based on
a completely fallacious either/or dichotomy.
(1) It is unarguably true that Python and Java use a type of
call-by-value. This follows from the standard definition of
On Nov 19, 2008, at 3:27 PM, Mohsen Akbari wrote:
I'm a newbie in python and I have this problem with the code that
I'm writing. There is a very long line which I wish to output it to
a text file.But when I do this, in the output file, the result
appears in two lines.
Appears that way
On Nov 21, 2008, at 2:08 AM, Steven D'Aprano wrote:
a, b = line.split()
Note that in a case like this, you may want to consider using
partition instead of split:
a, sep, b = line.partition(' ')
This way, if there happens to be more than one space (for example,
because the Unicode
On Nov 21, 2008, at 8:18 AM, Chuck Connors wrote:
The first value (large number) is the UPC, the next element is the
coupon description, followed by a date in parenthesis. Those are the
only three elements I am concerned with. Can someone help me in
reformatting this:
40922003 Life
On Nov 21, 2008, at 8:58 AM, r0g wrote:
I hadn't really appreciated the consequences of this till now though
e.g. that an instance might do a = a + 1 without affecting it's
siblings
but that b.append(fish) would affect b for everyone. I don't know
if I
will find any uses for that kind of
On Nov 21, 2008, at 9:00 AM, Steve Holden wrote:
Joe Strout wrote:
On Nov 21, 2008, at 2:08 AM, Steven D'Aprano wrote:
a, b = line.split()
Note that in a case like this, you may want to consider using
partition
instead of split:
a, sep, b = line.partition(' ')
This way
On Nov 21, 2008, at 9:22 AM, Tim Golden wrote:
Tim Chase wrote:
qfields = ['' + fld.strip() + '' for fld in (num,desc,date)]
out = qfields.join(',')
Just a quick note here to prevent the confusion of the OP...this
should be
','.join(qfields)
Thanks Tim #1, for pointing out my error (my
On Nov 21, 2008, at 10:26 AM, MRAB wrote:
The file will be closed automatically when the file object is
garbage-collected.
CPython uses reference-counting, so the file object is garbage-
collected as soon as there are no references to it.
Jython (and IronPython?) are garbage-collected in
I have a function that takes a reference to a class, and then
instantiates that class (and then does several other things with the
new instance). This is easy enough:
item = cls(self, **itemArgs)
where cls is the class reference, and itemArgs is obviously a set of
keyword arguments
On Nov 21, 2008, at 3:30 PM, Arnaud Delobelle wrote:
Of course it's possible: use type(name, bases, dict).
Thanks, I never knew about that form of type(). Neither does the
2.5.2 reference manual, whose only index entry for the type() function
is
On Nov 21, 2008, at 6:06 PM, Ned Deily wrote:
Where would I find documentation on this nifty function?
Where built-in functions are documented, the Python Library Reference:
http://www.python.org/doc/2.5.2/lib/built-in-funcs.html
Perfect, thank you. (Odd that the index entry for type()
On Nov 21, 2008, at 7:02 PM, Steven D'Aprano wrote:
I have a function that takes a reference to a class,
Hmmm... how do you do that from Python code? The simplest way I can
think
of is to extract the name of the class, and then pass the name as a
reference to the class, and hope it hasn't
On Nov 22, 2008, at 4:08 AM, Aaron Brady wrote:
Furthermore, to apply c-b-v to Python, you have to
introduce the concept of pointers, which is ostensibly non-native for
human programmers.
Not necessarily pointers per se -- any type of object references
will do, and yes, Python has those in
On Nov 24, 2008, at 11:10 AM, Matimus wrote:
I wrote this a while ago. I sort of regret it though. Mixins could
(and I will argue should) be avoided most of the time by delegating to
other objects with less functionality. Utilizing many mixin classes
tends to just make gigantic classes. This is
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