Just to add to scru's point: Being able to re-use code is an extremely important but sometimes overlooked feature of programming. Its main value is not saving time, but eliminating bugs.

That is,...

Well, that question may not have an answer if the values are not unique; for example, if

book['key1'] = {'keya':valuea, 'keyb':valueb}

and

book['key2'] = {'keya':valuec, 'keyd':valued}
...

Exactly so. Install PIL from the link above, and then


from PIL import Image, ImageTk

my_im = Image.open("myjpg.jpg")
real_im = ImageTk.PhotoImage(my_im)


and now you can use real_im in...

Hi all,

This is the beginning of a hopefully useful project: to create a Canvas widget for wxPython that will mimic or improve on the Tkinter Canvas widget. Those of you who have coded with both...

Generators are essentially dynamic sequences, making their official debut in Python 2.5.

That got me to thinking: can we make a circular list with them?

Why yes, we can...

Preliminary tip: encase your code in [ code="Python ] and [/code] tags (no spaces on the first tag) so that it'll look pretty.


This is a classic case of recursion:

fib(n) = fib(n-1) +...

You can also use read(size) or readlines(size). In both cases, size is the number of bytes to read (approximate for readlines).

Jeff

So I usually test my Tkinter apps from IDLE; in this case, I get the following error message every 'pixel' I scroll:


Traceback (most recent call last):
File...

The code looks good so far.

There is one feature of your code that you might not intend: e and e1 both have the result of the grid() operation, which is None. I'm guessing that you wanted e and...

I'm a bit confused about btn3, since I don't see its code. However, I do notice that btn1 does .bind("<Button-1>",callback).

That's actually overkill and can lead to the problem that you...

Just a little tweakery needed:


data_raw = """[20 ]
[ 35 ]
[40 ]
[84 ]
[100 ]
[ 245]
[ 260]

Also in the blackjack game: find a way to make the total() function deal with aces in a general way so that vega's worry about adding more aces can be satisfied.


def total(hand):
# how many...

Here's my stab at a quick tutorial:

Validating Input

Any time your program receives input from a device, it needs to check whether the input is valid. By far, the two most common points for...

well, one approach could be to have the button attached to a single callback that checks state and calls one of three functions based on the state:



def callback(self):

commands =...

I have code that attempts to do the same, but it reveals a couple of discrepancies. I'm wondering whether my code is wrong, or if perhaps there's something in your code, LaMouche


# create test...

Project for the advanced: write code to hack into Ene's gem store above from a remote zombie and change all the prices to $19.99.

:lol:

Write a function primes(n) that returns a list of primes less than n.

primes(13)
[2,3,5,7,11]
primes(25.2)
[2,3,5,7,11,13,17,19,23]

If you don't know any clever ways to generate primes,...

Here is the code that burned me today. I'm re-writing my Sudoku solver to make it more "Pythonic" -- it was my first Python project, and the old code looks like translated C :lol: -- anyways, at one...

Here's one that I actually wrote for home use cataloging several thousand pictures:

Write a program to scan a user-supplied directory for .jpg files. Then, output the list of files, sorted by...