On 13/05/2013 00:40, Ian Kelly wrote:
On Sun, May 12, 2013 at 5:23 PM, Mr. Joe wrote:
I seem to stumble upon a situation where "!=" operator misbehaves in
python2.x. Not sure if it's my misunderstanding or a bug in python
implementation. Here's a demo code to reproduce the behavior -
The != o
On 21/06/2013 18:01, Rick Johnson wrote:
[stuff]
It isn't clear to me from your posts what exactly you're proposing as an
alternative to the way Python's default argument binding works. In your
version of Python, what exactly would happen when I passed a mutable
argument as a default value
On 21/06/2013 19:26, Rick Johnson wrote:
On Friday, June 21, 2013 12:47:56 PM UTC-5, Rotwang wrote:
It isn't clear to me from your posts what exactly you're
proposing as an alternative to the way Python's default
argument binding works. In your version of Python, what
exactly wo
On 22/06/2013 02:15, Rick Johnson wrote:
On Friday, June 21, 2013 6:40:51 PM UTC-5, Rotwang wrote:
On 21/06/2013 19:26, Rick Johnson wrote:
[...]
I didn't ask what alternative methods of handling default
argument binding exist (I can think of several, but none
of them strikes me as prefe
On 22/06/2013 03:18, Chris Angelico wrote:
On Sat, Jun 22, 2013 at 12:01 PM, Rotwang wrote:
class hashablelist(list):
... def __hash__(self):
... return hash(tuple(self))
There's a vulnerability in that definition:
a=hashablelist((1,[],3))
a
[1, [], 3]
{a:1}
Traceback
On 22/06/2013 03:01, I wrote:
On 22/06/2013 02:15, Rick Johnson wrote:
[...]
This is what should happen:
py> def foo(arg=[]):
... arg.append(1)
... print(arg)
...
py> foo()
[1]
py> foo()
[1]
py> foo()
[1]
Yes, Yes, YES! That is intuiti
On 22/06/2013 19:49, Rick Johnson wrote:
On Saturday, June 22, 2013 12:19:31 PM UTC-5, Rotwang wrote:
On 22/06/2013 02:15, Rick Johnson wrote:
IS ALL THIS REGISTERING YET? DO YOU UNDERSTAND?
No, I don't. These two special cases are not sufficient
for me to determine what semantics yo
On 23/06/2013 18:29, Steven D'Aprano wrote:
On Sat, 22 Jun 2013 23:40:53 -0600, Ian Kelly wrote:
[...]
Can you elaborate or provide a link? I'm curious to know what other
reason there could be for magic methods to behave differently from
normal methods in this regard.
It's an efficiency opti
On 24/06/2013 07:31, Steven D'Aprano wrote:
On Mon, 24 Jun 2013 02:53:06 +0100, Rotwang wrote:
On 23/06/2013 18:29, Steven D'Aprano wrote:
On Sat, 22 Jun 2013 23:40:53 -0600, Ian Kelly wrote:
[...]
Can you elaborate or provide a link? I'm curious to know what other
reason
On 25/06/2013 23:57, Chris Angelico wrote:
On Wed, Jun 26, 2013 at 8:38 AM, Mark Janssen wrote:
Combining integers with sets I can make
a Rational class and have infinite-precision arithmetic, for example.
Combining two integers lets you make a Rational. Python integers are
already infinite-p
Sorry to be OT, but this is sending my pedantry glands haywire:
On 04/07/2013 08:06, Dave Angel wrote:
On 07/04/2013 01:32 AM, Steven D'Aprano wrote:
Well, if I ever have more than 63,000,000 variables[1] in a function,
I'll keep that in mind.
[1] Based on empirical eviden
On 05/07/2013 02:24, Steven D'Aprano wrote:
On Thu, 04 Jul 2013 17:54:20 +0100, Rotwang wrote:
[...]
Anyway, none of the calculations that has been given takes into account
the fact that names can be /less/ than one million characters long.
Not in *my* code they don't!!!
*wi
On 06/07/2013 20:38, Terry Reedy wrote:
"rms has crippling RSI" (anonymous, as quoted by Skip).
I suspect that 'rms' = Richard M Stallman (but why lower case? to insult
him?). I 'know' that RSI = Roberts Space Industries, a game company
whose Kickstarter project I supported. Whoops, wrong contex
On 06/07/2013 19:43, Joshua Landau wrote:
On 6 July 2013 13:59, Russel Walker wrote:
Since I've already wasted a thread I might as well...
Does this serve as an acceptable solution?
def supersum(sequence, start=0):
result = type(start)()
for item in sequence:
try:
On 06/07/2013 21:10, Rotwang wrote:
[...]
It's not quite clear to me what the OP's intentions are in the general
case, but calling supersum(item, start) seems odd - for example, is the
following desirable?
>>> supersum([[1], [2], [3]], 4)
22
I would have thought that t
On 06/07/2013 21:11, Stefan Behnel wrote:
Rotwang, 06.07.2013 21:51:
On 06/07/2013 20:38, Terry Reedy wrote:
"rms has crippling RSI" (anonymous, as quoted by Skip).
[...]
Let us try Google. Type in RSI and it offers 'RSI medications' as a
choice. Sound good, as it wi
On 29/07/2013 17:40, Ian Kelly wrote:
On Mon, Jul 29, 2013 at 10:20 AM, Chris Angelico wrote:
On Mon, Jul 29, 2013 at 5:09 PM, MRAB wrote:
I'm surprised that Fraction(1/3) != Fraction(1, 3); after all, floats
are approximate anyway, and the float value 1/3 is more likely to be
Fraction(1, 3)
On 29/07/2013 17:20, Chris Angelico wrote:
On Mon, Jul 29, 2013 at 5:09 PM, MRAB wrote:
I'm surprised that Fraction(1/3) != Fraction(1, 3); after all, floats
are approximate anyway, and the float value 1/3 is more likely to be
Fraction(1, 3) than Fraction(6004799503160661, 18014398509481984).
On 31/07/2013 14:55, Chris Angelico wrote:
[...]
Since the braced version won't run anyway, how about a translation like this:
def foo():
print("""Hello,
world!""")
for i in range(5):
foo()
return 42
-->
0-def foo():
4-print("""Hello,
0-world!""")
4-for i in range(5):
Hi all, I'm using Python 2.7.2 on Windows 7 and a module I've written is
acting strangely. I can reproduce the behaviour in question with the
following:
--- begin bugtest.py ---
import threading, Tkinter, os, pickle
class savethread(threading.Thread):
def __init__(self, value):
th
On 21/06/2012 18:07, Dave Angel wrote:
On 06/21/2012 11:19 AM, Rotwang wrote:
Hi all, I'm using Python 2.7.2 on Windows 7 and a module I've written
is acting strangely. I can reproduce the behaviour in question with
the following:
--- begin bugtest.py ---
import threading, Tkinter,
On 21/06/2012 18:37, Dennis Lee Bieber wrote:
On Thu, 21 Jun 2012 16:19:41 +0100, Rotwang
declaimed the following in gmane.comp.python.general:
import threading, Tkinter, os, pickle
class savethread(threading.Thread):
def __init__(self, value):
threading.Thread.__init__(self
Hi all, I have a module that saves and loads data using cPickle, and
I've encountered a problem. Sometimes I want to import the module and
use it in the interactive Python interpreter, whereas sometimes I want
to run it as a script. But objects that have been pickled by running the
module as a
On 23/06/2012 17:13, Peter Otten wrote:
Rotwang wrote:
Hi all, I have a module that saves and loads data using cPickle, and
I've encountered a problem. Sometimes I want to import the module and
use it in the interactive Python interpreter, whereas sometimes I want
to run it as a script
On 23/06/2012 18:31, Dave Angel wrote:
On 06/23/2012 12:13 PM, Peter Otten wrote:
Rotwang wrote:
Hi all, I have a module that saves and loads data using cPickle, and
I've encountered a problem. Sometimes I want to import the module and
use it in the interactive Python interpreter, wh
On 24/06/2012 00:17, Steven D'Aprano wrote:
On Sat, 23 Jun 2012 19:14:43 +0100, Rotwang wrote:
The problem is that if the object was
pickled by the module run as a script and then unpickled by the imported
module, the unpickler looks in __main__ rather than mymodule for the
object's
On 07/07/2012 19:26, Ask Solem wrote:
===
Celery 3.0 (Chiastic Slide) Released!
===
Does this have anything to do with the Autechre album?
--
I have made a thing that superficially resembles music:
http://soundc
On 12/07/2012 04:59, Steven D'Aprano wrote:
On Wed, 11 Jul 2012 08:41:57 +0200, Daniel Fetchinson wrote:
funcs = [ lambda x: x**i for i in range( 5 ) ]
Here's another solution:
from functools import partial
funcs = [partial(lambda i, x: x**i, i) for i in range(5)]
Notice that the arguments
On 21/07/2012 19:16, Rick Johnson wrote:
[...]
It's due to the new Google Groups interface. They started forcing everyone to
use the new buggy version about a week ago EVEN THOUGH the old interface is
just fine.
I disagree - the old interface was dreadful and needed fixing.
The new one is m
On 06/08/2012 00:46, PeterSo wrote:
I am just starting to learn Python, and I like to use the editor
instead of the interactive shell. So I wrote the following little
program in IDLE
# calculating the mean
data1=[49, 66, 24, 98, 37, 64, 98, 27, 56, 93, 68, 78, 22, 25, 11]
def mean(data):
On 06/08/2012 02:01, Matthew Barnett wrote:
On 06/08/2012 01:58, MRAB wrote:
On 06/08/2012 01:09, Rotwang wrote:
On 06/08/2012 00:46, PeterSo wrote:
I am just starting to learn Python, and I like to use the editor
instead of the interactive shell. So I wrote the following little
program in
On 10/08/2012 10:59, Peter Otten wrote:
[...]
If you have understood the above here's a little brain teaser:
a = ([1,2,3],)
a[0] += [4, 5]
Traceback (most recent call last):
File "", line 1, in
TypeError: 'tuple' object does not support item assignment
a[0]
What are the contents of a[
On 06/12/2012 00:19, Bruno Dupuis wrote:
[...]
Another advice: never ever
except XXXError:
pass
at least log, or count, or warn, or anything, but don't pass.
Really? I've used that kind of thing several times in my code. For
example, there's a point where I have a list of strings and I
On 06/12/2012 08:49, Bruno Dupuis wrote:
On Thu, Dec 06, 2012 at 04:32:34AM +, Steven D'Aprano wrote:
On Thu, 06 Dec 2012 03:22:53 +0000, Rotwang wrote:
On 06/12/2012 00:19, Bruno Dupuis wrote:
[...]
Another advice: never ever
except XXXError:
pass
at least log, or coun
On 06/12/2012 04:32, Steven D'Aprano wrote:
On Thu, 06 Dec 2012 03:22:53 +0000, Rotwang wrote:
[...]
Is there a problem with either of the above? If so, what should I do
instead?
They're fine.
Never, ever say that people should never, ever do something.
*cough*
Thanks.
--
I
Hi all,
the other day I 2to3'ed some code and found it ran much slower in 3.3.0
than 2.7.2. I fixed the problem but in the process of trying to diagnose
it I've stumbled upon something weird that I hope someone here can
explain to me. In what follows I'm using Python 2.7.2 on 64-bit Windows
7
On 11/01/2013 20:16, Ian Kelly wrote:
On Fri, Jan 11, 2013 at 12:03 PM, Rotwang wrote:
Hi all,
the other day I 2to3'ed some code and found it ran much slower in 3.3.0 than
2.7.2. I fixed the problem but in the process of trying to diagnose it I've
stumbled upon something weird t
Hi all, here's a problem I don't know how to solve. I'm using Python 2.7.2.
I'm doing some stuff in Python which means I have cause to call
functions that take a while to return. Since I often want to call such a
function more than once with the same arguments, I've written a
decorator to elim
On 20/04/2012 20:10, dmitrey wrote:
I have spent some time searching for a bug in my code, it was due to
different work of "is" with () and []:
() is ()
True
[] is []
False
(Python 2.7.2+ (default, Oct 4 2011, 20:03:08)
[GCC 4.6.1] )
Is this what it should be or maybe yielding unified resu
On 20/04/2012 21:03, Jan Sipke wrote:
Can you explain why there is a difference between the following two
statements?
a = []
a.append(1)
print a
[1]
print [].append(1)
None
append is a method of the list object []. Methods, in general, both do
something to the objects of which they are a
On 20/04/2012 17:10, Jon Clements wrote:
On Friday, 20 April 2012 16:57:06 UTC+1, Rotwang wrote:
Hi all, here's a problem I don't know how to solve. I'm using Python 2.7.2.
I'm doing some stuff in Python which means I have cause to call
functions that take a while to r
On 21/04/2012 09:36, Steven D'Aprano wrote:
[...]
Here is how I would write the above.
import functools
def memoise(func):
"""Decorator to memoise a function."""
cache = {}
@functools.wraps(func)
def inner(*args, **kwargs):
# Make sure keyword args are always look
On 25/04/2012 00:42, Kiuhnm wrote:
On 4/25/2012 1:18, Rotwang wrote:
Sorry if this is a stupid question, but what is up with this:
>>> from calendar import*
>>> Calendar
Traceback (most recent call last):
File "", line 1, in
Calendar
NameError: name 'Cal
On 01/05/2012 07:12, Frank Millman wrote:
[...]
I have had a look at this before, but there is one thing that Google
Groups does that no other reader seems to do, and that is that
messages are sorted according to thread-activity, not original posting
date. This makes it easy to see what has chan
On 27/02/2011 16:45, Paul Symonds wrote:
Can someone give and explanation of what is happening with the following:
a,b = 0,1 # this assigns a = 0 and b = 1
while b < 10:
... print b
... a, b = b, a+b
...
1
1
2
3
5
8
a=0
b=1
while b < 1000:
... print b
... a = b
... b = a+b
...
1
2
4
8
1
On 17/03/2011 18:49, Ian Kelly wrote:
On Thu, Mar 17, 2011 at 11:36 AM, Jeffrey Gaynor wrote:
There are fun math questions, for instance, is there a run of a million 1's
someplace in the decimal expansion of pi? Maybe so, but we just don't know,
since we've only computed the first trillion or
Here's something odd I've found with the tokenize module: tokenizing 'if x:\n
y' and then untokenizing the result adds '\\\n' to the end. Attempting to
tokenize the result again fails because of the backslash continuation with
nothing other than a newline after it. On the other hand, if the o
On Tuesday, January 17, 2017 at 11:11:27 AM UTC, Peter Otten wrote:
> Rotwang wrote:
>
> > Here's something odd I've found with the tokenize module: tokenizing 'if
> > x:\ny' and then untokenizing the result adds '\\\n' to the end.
> > At
On 12/11/2013 01:57, Terry Reedy wrote:
On 11/11/2013 7:02 AM, sg...@hotmail.co.uk wrote:
(Sorry for posting through GG, I'm at work.)
On Monday, November 11, 2013 11:25:42 AM UTC, Steven D'Aprano wrote:
Suppose I have a function that needs access to globals:
# module A.py
def spam():
g
On 11/11/2013 12:02, sg...@hotmail.co.uk wrote:
(Sorry for posting through GG, I'm at work.)
On Monday, November 11, 2013 11:25:42 AM UTC, Steven D'Aprano wrote:
Suppose I have a function that needs access to globals:
# module A.py
def spam():
g = globals() # this gets globals from A
On 22/11/2013 11:26, Steven D'Aprano wrote:
A frequently missed feature is the ability to chain method calls:
x = []
x.append(1).append(2).append(3).reverse().append(4)
=> x now equals [3, 2, 1, 4]
This doesn't work with lists, as the methods return None rather than
self. The class needs to be
On 23/11/2013 19:53, Rotwang wrote:
[...]
That's pretty cool. However, I can imagine it would be nice for the
chained object to still be an instance of its original type. How about
something like this:
[crap code]
The above code isn't very good - it will only work on types whose
c
On 24/11/2013 00:28, Rotwang wrote:
[...]
This solves some of the problems in my earlier effort. It keeps a copy
of the original object,
Sorry, I meant that it keeps a reference to the original object.
--
https://mail.python.org/mailman/listinfo/python-list
On 24/11/2013 14:27, Steven D'Aprano wrote:
On Sat, 23 Nov 2013 19:53:32 +0000, Rotwang wrote:
On 22/11/2013 11:26, Steven D'Aprano wrote:
A frequently missed feature is the ability to chain method calls:
[...]
chained([]).append(1).append(2).append(3).reverse().append(4) =>
On 27/11/2013 08:31, Antoon Pardon wrote:
Op 27-11-13 09:19, Chris Angelico schreef:
[...]
Do you mean standard British English, standard American English,
standard Australian English, or some other?
Does that significantly matter or are you just looking for details
you can use to disagree? A
On 04/12/2013 20:07, Piotr Dobrogost wrote:
[...]
Unless we compare with what we have now, which gives 9 (without space) or 10
(with space):
x = obj.'value-1'
x = getattr(obj, 'value-1')
That is not a significant enough savings to create new syntax.
Well, 9 characters is probably significa
On 06/12/2013 16:51, Piotr Dobrogost wrote:
[...]
I thought of that argument later the next day. Your proposal does
unify access if the old obj.x syntax is removed.
As long as obj.x is a very concise way to get attribute named 'x' from
object obj it's somehow odd that identifier x is treated n
On 07/12/2013 12:41, Jussi Piitulainen wrote:
[...]
if tracks is None:
tracks = []
Sorry to go off on a tangent, but in my code I often have stuff like
this at the start of functions:
tracks = something if tracks is None else tracks
or, in the case where I don't intend for the
On 07/12/2013 16:08, Roy Smith wrote:
In article <31f1bb84-1432-446c-a7d4-79ce16f2a...@googlegroups.com>,
wxjmfa...@gmail.com wrote:
It is on this level the FSR fails.
What is "FSR"? I apologize if this was explained earlier in the thread
and I can't find the reference.
It's the Flexible
On 07/12/2013 16:25, Steven D'Aprano wrote:
On Sat, 07 Dec 2013 16:13:09 +0000, Rotwang wrote:
On 07/12/2013 12:41, Jussi Piitulainen wrote:
[...]
if tracks is None:
tracks = []
Sorry to go off on a tangent, but in my code I often have stuff like
this at the start of func
On 08/01/2014 19:56, axis.of.wea...@gmail.com wrote:
can someone please explain why the following works, in contrast to the second
example?
def decorator(func):
def on_call(*args):
print args
return func(args)
return on_call
class Foo:
@decorator
def bar(s
On 12/01/2014 05:58, Chris Angelico wrote:
[...]
(BTW, is there no better notation than six nested for/range for doing
6d6? I couldn't think of one off-hand, but it didn't really much
matter anyway.)
If you're willing to do an import, then how about this:
>>> from itertools import product
>>>
On 17/01/2014 18:43, Tim Chase wrote:
On 2014-01-17 09:10, Mark Lawrence wrote:
Slight aside, any chance of changing the subject of this thread, or
even ending the thread completely? Why? Every time I see it I
picture Inspector Clouseau, "A BOM!!!" :)
In discussions regarding BOMs, I regular
On 30/01/2014 06:33, Andrew Berg wrote:
On 2014.01.29 23:56, Jessica Ross wrote:
I found something like this in a StackOverflow discussion.
def paradox():
... try:
... raise Exception("Exception raised during try")
... except:
... print "Except after try"
...
On 30/01/2014 12:49, Dave Angel wrote:
[...]
For hysterical reasons, True and False are instances of class
bool, which is derived from int. So for comparison purposes
False==0 and True==1. But in my opinion, you should never take
advantage of this, except when entering obfuscation
cont
On 30/01/2014 23:36, Joshua Landau wrote:
On 30 January 2014 20:38, Chris Angelico wrote:
Why is tuple unpacking limited to the last argument? Is it just for
the parallel with the function definition, where anything following it
is keyword-only?
You're not the first person to ask that:
http:
On 31/01/2014 00:21, Ben Finney wrote:
Rotwang writes:
On a vaguely-related note, does anyone know why iterable unpacking in
calls was removed in Python 3?
This is explained in the PEP which described its removal
http://www.python.org/dev/peps/pep-3113/>, especially
http://www.python.
On 03/02/2014 13:59, wxjmfa...@gmail.com wrote:
[...]
I noticed the same effect with the Python doc
since ? (long time).
Eg.
The Python Tutorial
appears as
The Python Tutorial¶
with a visible colored "¶", 'PILCROW SIGN',
blueish in Python 3, red in Python 2.7.6.
Hint: try clicking the ¶.
--
On 03/02/2014 18:37, wxjmfa...@gmail.com wrote:
[...]
Hint: try clicking the ¶.
I never was aware of this "feature". Is it deliverate?
Do you mean deliberate? Of course it is.
It gives to me the feeling of a badly programmed
html page, especially if this sign does correspond
to an eol!
On 10/02/2014 18:45, Rick Johnson wrote:
[...]
3. Implicit introspection is evil, i prefer all
references to a callable's names to result in a CALL
to that callable, not an introspection!
So, for example, none of
isinstance(x, myclass)
map(myfunc, range(10))
x = p
What's this? A discussion about angels dancing on a the head of a pin?
Great, I'm in.
On 13/02/2014 14:00, Marko Rauhamaa wrote:
Oscar Benjamin :
This isn't even a question of resource constraints: a digital computer
with infinite memory and computing power would still be limited to
working w
On 13/02/2014 22:00, Marko Rauhamaa wrote:
Rotwang :
for x in continuum(0, max(1, y)):
# Note: x is not traversed in the < order but some other
# well-ordering, which has been proved to exist.
if x * x == y:
retur
On 17/02/2014 06:21, Steven D'Aprano wrote:
On Mon, 17 Feb 2014 11:54:45 +1300, Gregory Ewing wrote:
[...]
[1] Mathematicians tried this. "Everything is a set!" Yeah, right...
No, that's okay. You only get into trouble when you have self-referential
sets, like "the set of all sets that don't
On 18/02/2014 21:44, Rick Johnson wrote:
[...]
Are you telling me you're willing to search through a single
file containing 3,734 lines of code (yes, Tkinter) looking
for a method named "destroy" of a class named "OptionMenu"
(of which three other classes contain a method of the same
exact name!
On 18/02/2014 23:41, Rick Johnson wrote:
On Tuesday, February 18, 2014 5:28:21 PM UTC-6, Rotwang wrote:
[snipped material restored for context]
On 18/02/2014 21:44, Rick Johnson wrote:
[...]
Are you telling me you're willing to search through a single
file containing 3,734 lines of
On 21/02/2014 18:58, K Richard Pixley wrote:
Could someone please explain to me why the two values at the bottom of
this example are different?
Python-3.3 if it makes any difference.
Is this a difference in evaluation between a class attribute and an
instance attribute?
Yes, see below.
--r
On 18/02/2014 23:28, Rotwang wrote:
[...]
I have music software that's a single 9K-line Python module, which I
edit using Notepad++ or gedit.
Incidentally, in the time since I wrote the above I've started using
Sublime Text 3, following somebody on c.l.p's recommendation (I
a
Hi all. I thought I had a pretty good grasp of Python's scoping rules,
but today I noticed something that I don't understand. Can anyone
explain to me why this happens?
>>> x = 'global'
>>> def f1():
x = 'local'
class C:
y = x
return C.y
>>> def f2():
x = 'local'
cl
On 04/04/2014 19:55, Ian Kelly wrote:
On Fri, Apr 4, 2014 at 12:37 PM, Rotwang wrote:
Hi all. I thought I had a pretty good grasp of Python's scoping rules, but
today I noticed something that I don't understand. Can anyone explain to me
why this happens?
x = 'global
On 04/05/2014 15:16, Steven D'Aprano wrote:
On Sun, 04 May 2014 20:03:35 +1200, Gregory Ewing wrote:
Steven D'Aprano wrote:
If it were a class method, you would call it by MyBaseClass.__new__()
rather than explicitly providing the cls argument.
But that wouldn't be any good, because the base
On 11/05/2014 04:11, Steven D'Aprano wrote:
[...]
And try running
this function in both 2.7 and 3.3 and see if you can explain the
difference:
def test():
if False: x = None
exec("x = 1")
return x
I must confess to being baffled by what happens in 3.3 with this
example. Neithe
On 11/05/2014 19:40, Ned Batchelder wrote:
On 5/11/14 9:46 AM, Rotwang wrote:
On 11/05/2014 04:11, Steven D'Aprano wrote:
[...]
And try running
this function in both 2.7 and 3.3 and see if you can explain the
difference:
def test():
if False: x = None
exec("x = 1"
On 06/08/2013 11:07, Rui Maciel wrote:
Joshua Landau wrote:
Unless you have a very good reason, don't do this [i.e. checking
arguments for type at runtime and raising TypeError]. It's a damn pain
when functions won't accept my custom types with equivalent
functionality -- Python's a duck-typed
On 12/08/2013 06:54, Dave Angel wrote:
[...]
This function makes no sense to me. A function should have three
well-defined pieces: what are its parameters, what does it do, what are
its side-effects, and what does it return.
No! A function should have *four* well-defined pieces: what are its
Hi all,
I've just started trying to learn how to use ttk, and I've discovered
something that I don't understand. I'm using Python 3.3.0 in Linux Mint
15. Suppose I create the following module:
# begin tkderp.py
import tkinter as tk
import tkinter.messagebox as _
from tkinter import ttk
from
On 16/09/2013 19:43, Serhiy Storchaka wrote:
16.09.13 19:28, Rotwang написав(ла):
On Windows 7 (sys.version is '3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012,
10:57:17) [MSC v.1600 64 bit (AMD64)]') there's no problem; f() works
fine in the first place. Does anybody know what
On 16/09/2013 23:34, Chris Angelico wrote:
On Tue, Sep 17, 2013 at 2:28 AM, Rotwang wrote:
If I then uncomment those two lines, reload the module and call f() again
(by entering tkderp.reload(tkderp).f()), the function works like it was
supposed to in the first place: two warnings, no
On 17/09/2013 12:32, Chris Angelico wrote:
[...]
If reloading and doing it again makes things different, what happens
if you simply trigger your code twice without reloading?
I've no idea if it'll help, it just seems like an attack vector on the
problem, so to speak.
Thanks for the suggestion
On 17/09/2013 15:35, Chris Angelico wrote:
On Wed, Sep 18, 2013 at 12:25 AM, Rotwang wrote:
In fact, if I replace tkderp with this:
# begin tkderp.py
import tkinter as tk
_root = tk.Tk()
_root.withdraw()
# end tkderp.py
then simply importing tkderp before tkderp2 is enough to make the
On 20/09/2013 16:21, Kasper Guldmann wrote:
I was playing around with lambda functions, but I cannot seem to fully grasp
them. I was running the script below in Python 2.7.5, and it doesn't do what
I want it to. Are lambda functions really supposed to work that way. How do
I make it work as I int
On 20/09/2013 16:51, bab mis wrote:
Hi ,
I have a function as below:
def func(**kwargs):
...
...
args="a='b',c='d'"
i want to call func(args) so that my function call will take a var as an
parameter.
it fails with an error "typeError: fun() takes exactly 0 arguments (1 given)
On 01/10/2013 23:54, Chris Friesen wrote:
I've got a fair bit of programming experience (mostly kernel/POSIX stuff in C).
I'm fairly new to python though, and was hoping for some advice.
Given the fact that function parameters do not specify types, when you're
looking at someone else's code
On 02/10/2013 11:15, Oscar Benjamin wrote:
On 2 October 2013 00:45, Rotwang wrote:
So the upside of duck-typing is clear. But as you've already discovered, so
is the downside: Python's dynamic nature means that there's no way for the
interpreter to know what kind of arguments
On 10/10/2013 16:51, Neil Cerutti wrote:
[...]
Mixed arithmetic always promotes to the wider type (except in
the case of complex numbers (Ha!)).
r == c is equivalent to r == abs(c), which returns the magintude
of the complex number.
What?
>>> -1 == -1 + 0j
True
>>> -1 == abs(-1 + 0j)
False
>
On 14/10/2013 06:02, Steven D'Aprano wrote:
On Sun, 13 Oct 2013 20:13:32 -0700, Tim Roberts wrote:
def add(c1, c2):
% Decode
c1 = ord(c1) - 65
c2 = ord(c2) - 65
% Process
i1 = (c1 + c2) % 26
% Encode
return chr(i1+65)
Python uses # for comments, not %
Hi all, I've found something weird with pdb and I don't understand it. I
want to define a function mydebugger() which starts the debugger in the
caller's frame. The following is copied from IDLE with Python 2.7.3
(I've since tried it with 3.3.0 and the same thing happens):
Python 2.7.3 (defau
On 24/06/2014 20:10, Rotwang wrote:
Hi all, I've found something weird with pdb and I don't understand it. I
want to define a function mydebugger() which starts the debugger in the
caller's frame. The following is copied from IDLE with Python 2.7.3
(I've since tried it wit
On 20/02/2013 11:50, Steven D'Aprano wrote:
[...alternatives to Google...]
Or if your ISP provides Usenet access, you can use a News client to read it
via comp.lang.python, or gmane.comp.python.general.
And if it doesn't, you can get free Usenet access that includes most of
the text-only gro
On 20/02/2013 03:53, Barry W Brown wrote:
[...]
Homer Simpson put it accurately last night. "I used to be with it when
I was younger. But it moved and now what I am with is no longer it."
Sorry to be pedantic, but the quote you're thinking of is from Abe Simpson:
http://www.youtube.com/watc
On 26/02/2013 12:54, Steven D'Aprano wrote:
One week ago, "JoePie91" wrote a blog post challenging the Python
community and the state of Python documentation, titled:
"The Python documentation is bad, and you should feel bad".
http://joepie91.wordpress.com/2013/02/19/the-python-documentation-is
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