e.g. can you predict the result of the following operations without trying
it?
a = [1, 2, 3, 4]
a[1:3] = [7, 8]
print a
[1, 7, 8, 4] Whew!
(I really wasn't positive that it shouldn't be [1, [7, 8], 4] !)
good job dick! of course, you *know* i'm going to ask this...
how *do*
wesley chun wescpy at gmail.com writes:
one question i'd like to ask is, in what context is such a line part
of your code? altho alan is correct in that syntactically, they're
very similar, i'm wondering what you're using it for.
Wesley,
Thanks for your reply (also thanks to others who
Thanks for your reply (also thanks to others who replied). I was trying to
translate a VBA sample in this page http://tinyurl.com/3hvj3j to python. The
VBA
sample has a line Set objDbx = Nothing.
kelie,
thanks for your reply... it helps clear things up -- i didn't think i
was going to
On Mon, Jun 30, 2008 at 11:26 AM, Kelie [EMAIL PROTECTED] wrote:
wesley chun wescpy at gmail.com writes:
one question i'd like to ask is, in what context is such a line part
of your code? altho alan is correct in that syntactically, they're
very similar, i'm wondering what you're using it for.
On Mon, Jun 30, 2008 at 12:53 AM, wesley chun [EMAIL PROTECTED] wrote:
As I understand it there are no cases where obj==None and obj is None
will give different results (which is not true for == vs is in
general), so is there any practical difference? Maybe you save a
handful of cycles?
I want to have a program that uses Tkinter to display a window.
If the user selects an option, then I want to destroy that window and
then display a second window.
In turn, the user can select an option to change back to the first
window and I want to destroy that window and then display the
Here's the working code for my problem. But i tried it to post 'No
files found' in case no specified files are found. It doesn't do that.
Just simply exits.
dir_input = raw_input('Enter dir: ')
win_trace = ['*.ini', '*.db']
for root, dirs, files in os.walk(dir_input):
for trace in
Le Monday 30 June 2008 16:17:45 Saad Javed, vous avez écrit :
Here's the working code for my problem. But i tried it to post 'No
files found' in case no specified files are found. It doesn't do that.
Just simply exits.
dir_input = raw_input('Enter dir: ')
win_trace = ['*.ini', '*.db']
for
On Sun, Jun 29, 2008 at 2:28 PM, Kent Johnson [EMAIL PROTECTED] wrote:
Note that this may be a violation of the Google Scholar terms of
service; I know it is a violation to automatically collect normal
Google search results, and IIRC Google takes some steps to make it
difficult as well.
Le Monday 30 June 2008 14:47:39 Jim Morcombe, vous avez écrit :
I want to have a program that uses Tkinter to display a window.
If the user selects an option, then I want to destroy that window and
then display a second window.
In turn, the user can select an option to change back to the first
Message: 5
Date: Mon, 30 Jun 2008 11:49:59 +0200
From: Andre Engels [EMAIL PROTECTED]
Subject: Re: [Tutor] Is var = None in Python equivalent to Set var
= Nothingin VB?
To: Kelie [EMAIL PROTECTED]
Cc: tutor@python.org
Message-ID:
[EMAIL PROTECTED]
Content-Type: text/plain;
Hello,
I would like to count list items but am not 100% sure how to do it.
Here is what I have so far:
for brain in brains:
x = getattr(brain, horizontal)
y = getattr(brain, vertical)
if x and y and (x, y) in table:
table[(x, y)] +=
Le Monday 30 June 2008 20:55:36 Norman Khine, vous avez écrit :
Hello,
I would like to count list items but am not 100% sure how to do it.
Here is what I have so far:
for brain in brains:
x = getattr(brain, horizontal)
y = getattr(brain, vertical)
Thanks,
but where do i replace the x with tuple(x)
Norman
Cédric Lucantis wrote:
Le Monday 30 June 2008 20:55:36 Norman Khine, vous avez écrit :
Hello,
I would like to count list items but am not 100% sure how to do it.
Here is what I have so far:
for brain in brains:
Le Monday 30 June 2008 21:31:35, vous avez écrit :
Thanks,
but where do i replace the x with tuple(x)
Whenever x is hashed, ie used as a key in a dictionary. You said you have:
table[(x, y)] += 1
where:
x = ['airlines-scheduled', 'airport-car-parking']
so you should
Jim Morcombe [EMAIL PROTECTED] wrote
If the user selects an option, then I want to destroy that window
and then display a second window.
In turn, the user can select an option to change back to the first
window and I want to destroy that window and then display the first
again.
You probably
Norman Khine [EMAIL PROTECTED] wrote
but when I run this, I get the following error on the line:
if x and y and (x, y) in table:
TypeError: list objects are unhashable
Please post the entire error. The tiny bit you posted was
not overly helpful, usually the stacjk trace contains the
Hi,
Sorry, but this did not work.
I have done this, which returns the values I want (sort of)
for brain in brains:
x = getattr(brain, horizontal)
if isinstance(x, list):
for item in x:
x = item
else:
At 11:01 PM 6/29/2008, wesley chun wrote:
e.g. can you predict
the result of the following operations without trying it?
a = [1, 2, 3, 4]
a[1:3] = [7, 8]
print a
[1, 7, 8, 4] Whew!
(I really wasn't positive that it shouldn't be [1, [7, 8], 4]
!)
good job dick! of course, you *know*
At 01:39 PM 6/30/2008, Dick Moores wrote:
At 11:01 PM 6/29/2008, wesley
chun wrote:
e.g. can you predict
the result of the following operations without trying it?
a = [1, 2, 3, 4]
a[1:3] = [7, 8]
print a
[1, 7, 8, 4] Whew!
(I really wasn't positive that it shouldn't be [1, [7, 8],
I am learning python from books and this mailing list. I used the
suggestions to come up with this;
#!/usr/bin/python
# Filename : new_remove-file.py
import os
import sys
import glob
dir_input = raw_input('Enter dir: ')
win_trace = ['*.ini', '*.db']
files_removed = 0
for root, dirs, files in
On Mon, Jun 30, 2008 at 4:47 PM, Dick Moores [EMAIL PROTECTED] wrote:
Show me a better way?
You can do it with slice assignment too:
a = [1, 2, 3, 4]
a[1:3] = [[7, 8]]
a
[1, [7, 8], 4]
Now, which way is better? The answer depends on context. The best
way to write it is in the manner that
You can do it with slice assignment too:
a = [1, 2, 3, 4]
a[1:3] = [[7, 8]]
a
[1, [7, 8], 4]
Now, which way is better? The answer depends on context. The best
way to write it is in the manner that it makes the most sense to
someone reading your program (including you, several
Thanks, Ryan, for detailed explanation;
I'm learning Python now, too, so I don't know exactly how stuff works.
[]'s
Douglas
On Mon, Jun 30, 2008 at 18:33, Lie Ryan [EMAIL PROTECTED] wrote:
You can do it with slice assignment too:
a = [1, 2, 3, 4]
a[1:3] = [[7, 8]]
a
[1, [7, 8], 4]
On 01/07/2008, Tony Cappellini [EMAIL PROTECTED] wrote:
In VB6 ( I have not worked with VB.NET), objects are set to Nothing when
they go out of scope, yet there is a fair amount lot of code out there where
objects are explicitly set to Nothing. This is a pretty common practice in
VB land.
This thread got a bit off track
but in Python these statements are unnecessary.
What happened to Explicit is better than implicit?
Regarding the original poster contrasting VB with Python
setting someObject = None is perfectly fine in Python, and a good analogy
between the languages.
Jerry Hill [EMAIL PROTECTED] wrote
You can do it with slice assignment too:
a = [1, 2, 3, 4]
a[1:3] = [[7, 8]]
a
[1, [7, 8], 4]
Now, which way is better? The answer depends on context.
If, conceptually, you are removing two elements from a list, then
adding a new element which is itself
John Fouhy [EMAIL PROTECTED] wrote
(I don't want to criticise VB programmers because I am not one.
Follow the local conventions is generally always a good rule of
programming)
I think this is a key point. I'm no VB expert but I do have
to read it from time to time.
VB programmers tend to set
David [EMAIL PROTECTED] wrote
dir_input = raw_input('Enter dir: ')
win_trace = ['*.ini', '*.db']
files_removed = 0
for root, dirs, files in os.walk(dir_input):
for trace in win_trace:
win_trace_path = os.path.join(root, trace)
for filename in glob.glob(win_trace_path):
Alan Gauld wrote:
David [EMAIL PROTECTED] wrote
dir_input = raw_input('Enter dir: ')
win_trace = ['*.ini', '*.db']
files_removed = 0
for root, dirs, files in os.walk(dir_input):
for trace in win_trace:
win_trace_path = os.path.join(root, trace)
for filename in
Hi Norman,
Norman Khine wrote:
for brain in brains:
x = getattr(brain, horizontal)
x = string.join(x, '' )
y = getattr(brain, vertical)
y = string.join(y, '' )
if x and y and (x, y) in table:
table[(x,
I'm working on a program to create Lindenmayer systems. These systems
depend on heavy string rewriting to form complex patterns.I've been
using string concatenation to read through the string, and then create
the new one based on a dictionary lookup. However it becomes very slow
once the string
I've been
using string concatenation to read through the string, and then create
the new one based on a dictionary lookup. However it becomes very slow
once the string gets very long (several thousand characters). [...]
I was wondering if there might be a
faster alternative to string
My bad, should have included some code. Here's the function which does
the grunt work. self.axiom is a string, where each character gets
replaced by its counterpart from self.rules. output then goes back to
the calling function. That's the end of one generation of the string.
The next generation
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