Andrew Berg wrote:
I am trying to understand the multiprocessing module, and I tried some
simple code:
import multiprocessing
def f():
print('bla bla')
p = multiprocessing.Process(target=f)
p.start()
p.join()
And the result is a new process that spawns a new process that spawns a
new
Grant Edwards wrote:
On 2011-12-21, Neil Cerutti ne...@norwich.edu wrote:
I cheerfully agree that programmers ignorant of C++ should not
write programs in it. But furthermore, they should also not
define a subset of C++ for use in embedded programming. ;)
I fully agree that programmers
Rolf Camps wrote:
alex23 schreef op wo 21-12-2011 om 16:50 [-0800]:
I'd say that _is_ the most pythonic way, it's very obvious in its
intent (or would be with appropriate names). If it bothers you that
much:
def listgen(count, default=[]):
for _ in xrange(count):
yield
Saqib Ali wrote:
MYCLASS.PY:
#!/usr/bin/env python
import os, sys, string, time, re, subprocess
import Singleton
This should be 'from Singleton import Singleton'
@Singleton
class myClass:
def __init__(self):
print 'Constructing myClass'
At this point, the *instance* of
Saqib Ali wrote:
I'm using this decorator to implement singleton class in python:
http://stackoverflow.com/posts/7346105/revisions
The strategy described above works if and only if the Singleton is
declared and defined in the same file. If it is defined in a different
file and I import that
Ian Kelly wrote:
On Thu, Dec 22, 2011 at 7:10 PM, alex23 wuwe...@gmail.com wrote:
On Dec 22, 6:51 pm, Rolf Camps r...@roce.be wrote:
I'm afraid it's dangerous to encourage the use of '[]' as assignment to
a parameter in a function definition. If you use the function several
times 'default'
rusi wrote:
On Dec 23, 7:10 am, alex23 wuwe...@gmail.com wrote:
On Dec 22, 6:51 pm, Rolf Camps r...@roce.be wrote:
I'm afraid it's dangerous to encourage the use of '[]' as assignment to
a parameter in a function definition. If you use the function several
times 'default' always points to the
GZ wrote:
Hi,
I run into a weird problem. I have a piece of code that looks like the
following:
f(, a=None, c=None):
assert (a==None)==(c==None)
Um -- if you don't want a and c being passed in, why put them in the
function signature?
~Ethan~
--
Nobody wrote:
nothing should compare
equal to None except for None itself, so x is None and x == None
shouldn't produce different results unless there's a bug in the comparison
method.
Why wouldn't you want other types that can compare equal to None? It
could be useful for a Null type to ==
Devin Jeanpierre wrote:
Um -- if you don't want a and c being passed in, why put them in the
function signature?
He wants both or neither to be passed in.
Ah -- right.
~Ethan~
--
http://mail.python.org/mailman/listinfo/python-list
Andrew Berg wrote:
On 12/31/2011 12:19 PM, davidfx wrote:
Should we always be using .format() for formatting strings or %?
%-style formatting will eventually go away, but
probably not for a long time.
%-style formatting isn't going away.
~Ethan~
--
Peter Otten wrote:
Lie Ryan wrote:
On 01/02/2012 11:20 PM, Peter Otten wrote:
Felinx Lee wrote:
I have removed those packages (girlfriend and others) from PyPI forever,
I apologize for that.
The thought police has won :(
I think the community has a right to defend themselves against
Ian Kelly wrote:
I'm not sure it's true that there are no plans to do so in the
foreseeable future. According to the release notes from Python 3.0,
% formatting was supposed to be deprecated in Python 3.1.
Eric Smith wrote (from a thread on pydev in 02-2011):
The last thread on this I have a
Ian Kelly wrote:
http://mail.python.org/pipermail/python-dev/2009-September/092399.html
Thanks, that link is very informative.
Here's the link to the last discussion last February:
http://mail.python.org/pipermail/python-dev/2011-February/108155.html
~Ethan~
--
Devin Jeanpierre wrote:
one obvious way != only one way
Which way is the obvious way? Why is it obvious?
Apparently, %-style is obvious to C and similar coders, while {}-style
is obvious to Java and similar coders.
:)
~Ethan~
--
http://mail.python.org/mailman/listinfo/python-list
Neil Cerutti wrote:
On 2012-01-03, Stefan Krah stefan-use...@bytereef.org wrote:
Andrew Berg bahamutzero8...@gmail.com wrote:
To add my opinion on it, I find format() much more readable and easier
to understand (with the exception of the {} {} {} {} syntax), and would
love to see %-style
Ben Finney wrote:
I have no idea what it would take to persuade you in particular. I do
know that the combined privileges of being white, male, not-poor, and
English-fluent (and many more privileges, I'm sure) grant both of us the
luxury of barely even perceiving the harm done by a pervasive
Ulrich Eckhardt wrote:
Hi!
The topic explains pretty much what I'm trying to do under Python
2.7[1]. The reason for this is that I want dir(SomeType) to show the
attributes in the order of their declaration. This in turn should
hopefully make unittest execute my tests in the order of their
Steven D'Aprano wrote:
Normally this is harmless, but there is one interesting little glitch you
can get:
t = ('a', [23])
t[1] += [42]
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: 'tuple' object does not support item assignment
t
('a', [23, 42])
There is
With NaN, it is possible to get a list that will not properly sort:
-- NaN = float('nan')
-- spam = [1, 2, NaN, 3, NaN, 4, 5, 7, NaN]
-- sorted(spam)
[1, 2, nan, 3, nan, 4, 5, 7, nan]
I'm constructing a Null object with the semantics that if the returned
object is Null, it's actual value is
Gary Herron wrote:
If the method does not bind it, then Python will look in the class for
foo. This could work
class Class1:
foo = whatever # Available to all instances
def __init__(self):
foo.bar.object
self.foo.bar.object
^- needs the self
Matty Sarro wrote:
from sys import argv
script,filename=argv
txt=open(filename)
print Here is your file %r: % filename
print txt.read()
print I'll also ask you to type it again:
file_again=raw_input( )
txt_again=open(file_again)
print txt_again.read()
IDLE is saying that my error is on line 4,
Charles Yeomans wrote:
On Jan 31, 2012, at 9:51 AM, Steven D'Aprano wrote:
On Tue, 31 Jan 2012 08:57:31 -0500, Charles Yeomans wrote:
I don't think of a tuple as a container, and I don't think it a
misunderstanding on my part to think this.
Well, it is a misunderstanding, because tuples
Olive wrote:
I am learning python and maybe this is obvious but I have not been able
to see a solution. What I would like to do is to be able to execute a
function within the namespace I would have obtained with from module
import *
For example if I write:
def f(a):
return
Ian Kelly wrote:
I am not a dev, but I believe it works because assigning to locals()
and assigning via exec are not the same thing. The problem with
assigning to locals() is that you're fundamentally just setting a
value in a dictionary, and even though it happens to be the locals
dict for the
Ethan Furman wrote:
Ian Kelly wrote:
I am not a dev, but I believe it works because assigning to locals()
and assigning via exec are not the same thing. The problem with
assigning to locals() is that you're fundamentally just setting a
value in a dictionary, and even though it happens
Ian Kelly wrote:
On Wed, Feb 1, 2012 at 3:24 PM, Ethan Furman et...@stoneleaf.us wrote:
Definitely should rely on it, because in CPython 3 exec does not un-optimize
the function and assigning to locals() will not actually change the
functions variables.
Well, the former is not surprising
Ian Kelly wrote:
On Wed, Feb 1, 2012 at 4:41 PM, Ethan Furman et...@stoneleaf.us wrote:
I'm not sure what you mean by temporary:
-- def f(x, y):
... frob = None
... loc = locals()
... loc[x] = y
... print(loc)
... print(locals())
... print(loc)
... print(locals
Ian Kelly wrote:
Sure, but that's not actually out of sync. The argument of your exec
evaluates to 'print (a)'. You get two different results because
you're actually printing two different variables.
Ah -- thanks, I missed that.
You can get the dict temporarily out of sync:
def f(x, y):
Ethan Furman wrote:
Ethan Furman wrote:
Ian Kelly wrote:
I am not a dev, but I believe it works because assigning to locals()
and assigning via exec are not the same thing. The problem with
assigning to locals() is that you're fundamentally just setting a
value in a dictionary, and even
Peter Otten wrote:
jkn wrote:
is it possible to have multiple namespaces within a single python
module?
Unless you are abusing classes I don't think so.
Speaking of...
code
class NameSpace(object):
def __init__(self, globals):
self.globals = globals
Peter Otten wrote:
Hm, what about
with NameSpace(globals()) as a:
x = inside a!
def function():
print(x)
with NameSpace(globals()) as b:
x = inside b!
def function():
print(x)
x = inside main!
a.function()
b.function()
It would have to be `a.x = ...` and
Ethan Furman wrote:
Hrm -- and functions/classes/etc would have to refer to each other that
way as well inside the namespace... not sure I'm in love with that...
Not sure I hate it, either. ;)
Slightly more sophisticated code:
code
class NameSpace(object):
def __init__(self
Ben Finney wrote (from signature):
“It's a terrible paradox that most charities are driven by religious
belief. . . . if you think altruism without Jesus is not altruism,
then you're a dick.” —Tim Minchin, 2010-11-28
1) Why is it paradoxical? If anything it's a sad commentary on those
who
Still messing with .dbf files?
Somebody brought you a 15 year old floppy, which still luckily (?)
worked, and now wants that ancient data?
dbf to the rescue!
Supported tables/features
=
- dBase III
- FoxPro
- Visual FoxPro supported
- Null value
Supported
Steven D'Aprano wrote:
On Wed, 15 Feb 2012 10:04:34 +, Duncan Booth wrote:
Actually, I thought it was a bit weird that I saw ChrisA's comment but
not the message he was commenting on until I went and looked for it. I
read this group on a couple of machines and it looks like Rick's
killfile
On Fri, Feb 17, 2012 at 1:43 AM, Rick Johnson wrote:
On 2/15/2012 4:51 PM, Alan McKay wrote:
Is this the right list?
This is neither the right or left list, however, it may be either
the correct or incorrect depending on your question.
Alan,
Welcome to the list. There are lots of
Steven D'Aprano wrote:
On Thu, 23 Feb 2012 16:30:09 -0800, Alex Willmer wrote:
This week I was slightly surprised by a behaviour that I've not
considered before. I've long used
for i, x in enumerate(seq):
# do stuff
as a standard looping-with-index construct. In Python for loops don't
jmfauth wrote:
On 25 fév, 23:51, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
On Sat, 25 Feb 2012 13:25:37 -0800, jmfauth wrote:
(2.0).hex()
'0x1.0p+1'
(4.0).hex()
'0x1.0p+2'
(1.5).hex()
'0x1.8p+0'
(1.1).hex()
'0x1.1999ap+0'
OKB (not okblacke) wrote:
Anyway, testing this just reinforced my distaste for circular
imports. Just trying to think about how it ought to work with a
importing c but then c and d importing each other makes my brain hurt.
Refactoring the files so that common code is in a separate
Michael Torrie wrote:
He's simply showing you the hex (binary) representation of the
floating-point number's binary representation. As you can clearly see
in the case of 1.1, there is no finite sequence that can store that.
You end up with repeating numbers.
Thanks for the explanation.
Jeff Beardsley wrote:
HISTORY:
In using python 2.7.2 for awhile on a web project (apache/wsgi web.py), I
discovered a problem in using decimal.Decimal. A short search revealed that
many other people have been having the problem as well, in their own
apache/wsgi implementations (django,
A. Lloyd Flanagan wrote:
On Friday, March 2, 2012 6:49:39 PM UTC-5, Ethan Furman wrote:
Jeff Beardsley wrote:
HISTORY:
...
What you should be doing is:
import decimal
from decimal import Decimal
reload(decimal)
Decimal = decimal.Decimal # (rebind 'Decimal' to the reloaded
Jeff Beardsley wrote:
The problem with that though: I am not calling reload(), except to
recreate the error as implemented by the web frameworks.
I am also unlikely to get a patch accepted into several different
projects, where this is ONE project, and it's a simple change
Simple -- maybe.
hyperboogie wrote:
Hello everyone.
This is my first post in this group.
I started learning python a week ago from the dive into python e-
book and thus far all was clear.
However today while reading chapter 5 about objects and object
orientation I ran into something that confused me.
it says
Dave Angel wrote:
On 03/08/2012 04:40 PM, John Salerno wrote:
SNIP
http://i271.photobucket.com/albums/jj138/JohnJSal/lxml_error.png
Nothing to do with Python, but you'd save us all a lot of space and
bandwidth if you learned how to copy/paste from a Windows cmd window.
On Windows XP it
Hey all!
I posted a question/answer on SO earlier, but there seems to be some
confusion around either the question or the answer (judging from the
comments).
http://stackoverflow.com/q/9638921/208880
If anyone here is willing to take a look at it and let me know if I did
not write it well,
Terry Reedy wrote:
Thanks for the review, Terry!
On 3/9/2012 5:10 PM, Ethan Furman wrote:
http://stackoverflow.com/q/9638921/208880
If anyone here is willing to take a look at it and let me know if I did
not write it well, I would appreciate the feedback
Here's the question text
Owen Jacobson wrote:
On 2012-03-09 22:10:18 +, Ethan Furman said:
Hey all!
I posted a question/answer on SO earlier, but there seems to be some
confusion around either the question or the answer (judging from the
comments).
http://stackoverflow.com/q/9638921/208880
If anyone here
Andrea Crotti wrote:
I started the following small project:
https://github.com/AndreaCrotti/import-tree
because I would like to find out what exactly depends on what at
run-time, using an import hook.
It works quite well for small examples but the main problem is that once
a module is
Neil Cerutti wrote:
On 2012-03-16, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote:
Ah, perhaps you're talking about *prescriptivist* grammarians,
who insist on applying grammatical rules that exist only in
their own fevered imagination. Sorry, I was talking about the
other sort, the
Nathan Rice wrote:
Logo. It's turtles all the way down.
+1 QOTW
--
http://mail.python.org/mailman/listinfo/python-list
Chris Rebert wrote:
On Fri, Mar 23, 2012 at 10:13 AM, Dennis Lee Bieber wrote:
On Fri, 23 Mar 2012 09:30:24 -0700, Chris Rebert
declaimed the following in gmane.comp.python.general:
On Fri, Mar 23, 2012 at 9:16 AM, Yves S. Garret
*yoursurrogate...@gmail.com* wrote:
snip
make
Kiuhnm wrote:
On 3/23/2012 17:33, Nathan Rice wrote:
Given the examples you pose here, it is clear that you are assuming
that the streams are synchronized in discrete time. Since you do not
provide any mechanism for temporal alignment of streams you are also
assuming every stream will have an
Peter Daum wrote:
On 2012-03-28 12:42, Heiko Wundram wrote:
Am 28.03.2012 11:43, schrieb Peter Daum:
... in my example, the variable s points to a string, i.e. a series of
bytes, (0x61,0x62 ...) interpreted as ascii/unicode characters.
No; a string contains a series of codepoints from the
Prasad, Ramit wrote:
You can read as bytes and decode as ASCII but ignoring the troublesome
non-text characters:
print(open('text.txt', 'br').read().decode('ascii', 'ignore'))
Das fr ASCII nicht benutzte Bit kann auch fr Fehlerkorrekturzwecke
(Parittsbit) auf den Kommunikationsleitungen oder
Good Day!
I am stuck... hopefully a few fresh pairs of eyes will spot what I am
missing.
I have a metaclass, Traits, and two different testing files,
test_traits.py and tests.py. test_traits works fine, tests generates
the following error:
Chris Rebert wrote:
Shouldn't meta= instead be metaclass= ?
Xavier Ho wrote:
I think you need to have metaclass in the class statement, not just meta.
Argh. Thank you both. I'm glad it was simple!
~Ethan~
--
http://mail.python.org/mailman/listinfo/python-list
James Mills wrote:
On Wed, Aug 4, 2010 at 7:20 PM, Navkirat Singh navkir...@gmail.com wrote:
I was wondering what are the differences between queues and pipes implemented
using multiprocessing python module. Am I correct if I say, in pipes, if
another process writes to one receiving end
Nobody wrote:
On Thu, 09 Sep 2010 12:23:17 -0700, Ethan Furman wrote:
basically a Queue is a syncronization primitive used to
share and pass data to and from parent/child processes.
A pipe is as the name suggests, a socket pair connected
end-to-end allowing for full-duplex communications
I need some fresh eyes, or better brains, or both!
The expected debugging output is a list of names in alphabetical order
from each node (there are about 90 of them); what I am getting is this:
-- dbf.tables.Index.from_file('', r'aad13658_last_name_for_state.idx')
starting next_item call
MRAB wrote:
On 17/09/2010 17:55, Ethan Furman wrote:
MRAB wrote:
On 16/09/2010 00:23, Ethan Furman wrote:
PS
My apologies if this shows up twice, I haven't seen my other post yet
and it's been 27 hours.
That's probably because you sent it directly to me.
That would explain it -- like I
Lie Ryan wrote:
[snip]
And even dict-syntax is not perfect for accessing XML file, e.g.:
a
bfoo/b
bbar/b
/a
should a['b'] be 'foo' or 'bar'?
Attribute style access would also fail in this instance -- how is this
worked-around?
--
~Ethan~
--
Greetings!
Does anybody have any pointers, tips, web-pages, already written
routines, etc, on parsing *.cdx files? I have found the pages on MS's
sight for Foxpro, but they neglect to describe the compaction algorithm
used, and my Google-fu has failed to find any sites with that information.
Ethan Furman wrote:
Greetings!
Does anybody have any pointers, tips, web-pages, already written
routines, etc, on parsing *.cdx files? I have found the pages on MS's
sight for Foxpro, but they neglect to describe the compaction algorithm
used, and my Google-fu has failed to find any sites
MRAB wrote:
On 17/09/2010 20:16, Ethan Furman wrote:
Greetings!
Does anybody have any pointers, tips, web-pages, already written
routines, etc, on parsing *.cdx files? I have found the pages on MS's
sight for Foxpro, but they neglect to describe the compaction algorithm
used, and my Google-fu
Carl Karsten wrote:
On Sat, Sep 18, 2010 at 1:11 AM, Ethan Furman et...@stoneleaf.us wrote:
Does anybody have any pointers, tips, web-pages, already written routines,
etc, on parsing *.cdx files? I have found the pages on MS's sight for
Foxpro, but they neglect to describe the compaction
Carl Karsten wrote:
On Sat, Sep 18, 2010 at 11:16 AM, Ethan Furman et...@stoneleaf.us wrote:
Carl Karsten wrote:
On Sat, Sep 18, 2010 at 1:11 AM, Ethan Furman et...@stoneleaf.us wrote:
Does anybody have any pointers, tips, web-pages, already written
routines,
etc, on parsing *.cdx files
Vernon Cole wrote:
Ethan:
I cannot see where you mentioned your operating system, I am assuming
Windows.
Perhaps you have already investigated this ... I have no way to test it
... but you might try:
ADO can access almost any data source, and a quick look seems to show
that .dbf is
Dennis Lee Bieber wrote:
On Sat, 18 Sep 2010 10:44:06 -0700, Ethan Furman et...@stoneleaf.us
declaimed the following in gmane.comp.python.general:
I have a pure-python module to read db3 and vfp 6 dbf files, and I find
that I need to read (and write) the idx and cdx index files that foxpro
Carl Karsten wrote:
On Sat, Sep 18, 2010 at 11:23 PM, Ethan Furman et...@stoneleaf.us wrote:
Thanks for the suggestion, but I don't want to be tied to Foxpro, which
means I need to be able to parse these files directly. I have the dbf
files, now I need the idx and cdx files.
What do you
M.-A. Lemburg wrote:
If you are working on Windows, you can install the MS MDAC package to
get a hold of the MS FoxPro ODBC drivers. They are usually already installed
in Vista and 7, in XP they comes with MS SQL Server and MS Office as
well. mxODBC can then provide Python access on Windows,
Steven D'Aprano wrote:
On Mon, 20 Sep 2010 19:45:37 +0100, Chris Withers wrote:
Well, no, that doesn't feel right. Normalisation of case, for me, means
give me the case as the filesystem thinks it should be,
What do you mean the filesystem?
Well, if it were me, it would be either the
John Posner wrote:
Another missing feature candidate: sublist
'bc' in 'abcde'
True
list('bc') in list('abcde')
False
I'm not aware of any idioms, but how about a simple function?
def listinlist(list1, list2):
checks if list1 is in list2
if not list1:
return True
kj wrote:
I'm interested in reading people's take on the question and their
way of dealing with those functions they consider worthy of the
standard library.)
Well, I have no functions than I'm lobbying to get into the stdlib, but
for all those handy-dandy utility functions, decorators, and
John Nagle wrote:
On 10/1/2010 12:42 AM, bruno.desthuilli...@gmail.com wrote:
On 30 sep, 19:22, Andreas Waldenburgeruse...@geekmail.invalid
wrote:
But it does violate the explicit is better than implicit tenet, don't
you think?
Why so ? The doc clearly states that booleans are integers
If I'm printing the number 735, or any other positive or negative
integer, is there any difference between %7s and %7d?
~Ethan~
--
http://mail.python.org/mailman/listinfo/python-list
Ethan Furman wrote:
If I'm printing the number 735, or any other positive or negative
integer, is there any difference between %7s and %7d?
Grant Edwards wrote:
Let's ask Python:
-- [n for n in range(-,,123) if (%7d % n)
!= (%7s % n)]
[]
-- [n for n
Antoon Pardon wrote:
Suppose you write your class so that '+' will provide addition and
you provide a method concat to concatenate. Now no matter how usefull
the sequence library would be for you, you can't use it. You will
have to rewrite those function you need, in terms of a concat method
On one the many mini-reports we use, we have a bunch of counts that are
frequently zero; because the other counts can also be low, it becomes
easy to miss the non-zero counts. For example:
Code Description
Conv Errors : 6
31,N DPV Failure : 4
MRAB wrote:
On 06/10/2010 00:17, Ethan Furman wrote:
[snip]
Any comments appreciated, especially ideas on how to better handle
class- and staticmethods
I think that's a bit of overkill. The problem lies in the printing
part, but you're spreading the solution into the rest
Carl Banks wrote:
On Oct 5, 4:17 pm, Ethan Furman et...@stoneleaf.us wrote:
class DashInt(int):
__metaclass__ = Perpetuate
def __str__(x):
if x == 0:
return '-'
return int.__str__(x)
Well, it's definitely overkill for printing a dash instead of a zero
Lawrence D'Oliveiro wrote:
In message 87hbgyosdc@web.de, Diez B. Roggisch wrote:
Lawrence D'Oliveiro l...@geek-central.gen.new_zealand writes:
In message 87d3rorf2f@web.de, Diez B. Roggisch wrote:
Lawrence D'Oliveiro l...@geek-central.gen.new_zealand writes:
What exactly is the
Steven D'Aprano wrote:
And how often do you have an list that you are creating where you don't
know what items you have to initialise the list with?
[snip]
You are right to point out that the third case is a Python gotcha: [[]]*n
doesn't behave as expected by the naive or inexperienced
Peter Pearson wrote:
On Sat, 09 Oct 2010 19:30:16 -0700, Ethan Furman et...@stoneleaf.us wrote:
Steven D'Aprano wrote:
[snip]
But that doesn't mean that the list comp is the general purpose solution.
Consider the obvious use of the idiom:
def func(arg, count):
# Initialise the list
John Nagle wrote:
On 10/10/2010 12:53 AM, Lawrence D'Oliveiro wrote:
In message4cb14f8c$0$1627$742ec...@news.sonic.net, John Nagle wrote:
Within fn1, the first reference to self.classvar references the
class-
level version of classvar. The assignment overrides that and
creates an
Lawrence D'Oliveiro wrote:
In message mailman.1466.1286556950.29448.python-l...@python.org, Ethan
Furman wrote:
Lawrence D'Oliveiro wrote:
But they can only recognize it as a BOM if they assume UTF-8 encoding to
begin with. Otherwise it could be interpreted as some other coding.
Not so
Lawrence D'Oliveiro wrote:
In message mailman.1533.1286774527.29448.python-l...@python.org, Ethan
Furman wrote:
Lawrence D'Oliveiro wrote:
In message mailman.1466.1286556950.29448.python-l...@python.org, Ethan
Furman wrote:
Lawrence D'Oliveiro wrote:
But they can only recognize
Antoon Pardon wrote:
On Sat, Oct 09, 2010 at 01:37:03AM +, Steven D'Aprano wrote:
On Fri, 08 Oct 2010 15:53:17 -0400, Jed Smith wrote:
On Fri, Oct 8, 2010 at 1:26 PM, Steven D'Aprano
st...@remove-this-cybersource.com.au wrote:
On Fri, 08 Oct 2010 10:21:16 +0200, Antoon Pardon wrote:
Lawrence D'Oliveiro wrote:
In message pan.2010.10.05.20.44.49.109...@nowhere.com, Nobody wrote:
If I'm catching exceptions in order to perform clean-up, I'll use a bare
except and re-raise the exception afterwards. In that situation, a bare
except is usually the right thing to do.
Wrong way
Lawrence D'Oliveiro wrote:
In message 8h9ob9fku...@mid.individual.net, Gregory Ewing wrote:
Lawrence D'Oliveiro wrote:
Did you know that applying the “set” or “frozenset” functions to a dict
return a set of its keys?
Seems a bit dodgy, somehow.
That's just a consequence of the fact that
Seebs wrote:
On 2010-10-12, Hallvard B Furuseth h.b.furus...@usit.uio.no wrote:
self.type, self.name = None, None
Actually you can write self.type = self.name = None,
though assignment statements are more limited than in C.
(And I think they're assigned left-to-right.)
Python 2.5.4
Ian Kelly wrote:
here is an example
where the order of assignment actually matters:
d['a'] = d = {}
Traceback (most recent call last):
File stdin, line 1, in module
NameError: name 'd' is not defined
d = d['a'] = {}
d
{'a': {...}}
As you can see, they're assigned left-to-right.
Jonas H. wrote:
On 10/21/2010 08:09 PM, Brendan wrote:
Two modules:
x.py:
class x(object):
pass
y.py:
from x import x
class y(x):
pass
Now from the python command line:
import y
dir(y)
['__builtins__', '__doc__', '__file__', '__name__', '__package__',
'x', 'y']
I do not
Neil Cerutti wrote:
On 2010-10-21, James Mills prolo...@shortcircuit.net.au wrote:
Rather than creating a new dict why don't you just do:
def _scrunch(d):
for k, v in d.items():
if v is None:
del d[k]
In Python 3, where items returns an iterator, modifying the
dictionary in
John Nagle wrote:
On 10/20/2010 9:32 PM, Phlip wrote:
Not Hyp:
def _scrunch(**dict):
result = {}
for key, value in dict.items():
if value is not None: result[key] = value
return result
That says throw away every item in a dict if the Value is None.
Are there any
gb345 wrote:
In mailman.128.1287758336.2218.python-l...@python.org Tim Golden
m...@timgolden.me.uk writes:
On 22/10/2010 15:25, gb345 wrote:
3. Both versions of the app work fine on Windows 7, as long as
I do the following:
a. run CMD
b. cd to where the GUI script and my original
John Nagle wrote:
On 10/22/2010 6:10 AM, Ethan Furman wrote:
John Nagle wrote:
class nonnulldict(dict) :
def __setitem__(self, k, v) :
if not (v is None) :
dict.__setitem__(self, k, v)
That creates a subclass of dict which ignores stores of None values.
So you never store the unwanted
Raymond Hettinger wrote:
On Oct 21, 5:18 pm, Paul Rubin no.em...@nospam.invalid wrote:
The API you suggested looks reasonable although you should also say how
to delete a context, how to find the inner contexts of a context, etc.
The c.parent.parent.parent chain finds successive enclosing
kj wrote:
In mailman.232.1288020268.2218.python-l...@python.org Steve Holden
st...@holdenweb.com writes:
On Oct 25, 5:07 am, kj no.em...@please.post wrote:
In The Zen of Python, one of the maxims is flat is better than
nested? Why? Can anyone give me a concrete example that illustrates
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