[Tutor] namespaces

Hi, This code generates the message "UnboundLocalError: local variable 'doubles' referenced before assignment" (line: if d[0] == d[1] and doubles == 2:) http://pastebin.com/mYBaCfj1 I think I have a fair picture of what it means but I would be very happy if someone could explain the d

Re: [Tutor] namespaces

Thanks Evert for pointing out the difference and the discussion on global variables, it helped. /Robert -Ursprungligt meddelande- Från: Evert Rol [mailto:evert@gmail.com] Skickat: den 30 maj 2010 18:34 Till: Robert Johansson Kopia: tutor@python.org Ämne: Re: [Tutor] namespaces

[Tutor] random graph

Dear all, I'm trying to check the size of a component in a random graph with this code (by a component I mean a maximal connected sub graph): http://pastebin.com/SzC77HdU I'm not 100 % sure that the code is working as it should but my question is if there is a better way to design the w

[Tutor] Tkinter

Dear all, I have a problem with Tkinter and swedish letters such as ä (or '\xe4'). Here’s a small code example that counts the number of occurrences of the letter ‘a’ is in a string given by the user: from Tkinter import * root=Tk() def callback(): a=textLine.get() print a.cou

Re: [Tutor] Most pythonic input validation

> Hi, > I'm writing a text based menu and want to validate the user input. I'm > giving the options as integers, and I want to make sure the user enters a > proper value. > Here's what I've got so far: http://pastebin.com/m1fdd5863 > I'm most interested in this segment: >     while True: >         

Re: [Tutor] Most pythonic input validation

> What if a valid user input has to be an integer between 10 and 20? I mean, > it could be that you are doing something that only makes sense for that > input. Would it be pythonic to add a test like: > > If prompt in range(10,21): Better to write if 10 <= prompt <= 20: >  ... > else: >  ... ra

Re: [Tutor] Iterating over two sequences in "parallel"

Hi! I want to process corresponding elements of two lists, sequentially. Call the lists list1 and list2, and assume they have equal lengths. I can do something like for index in range(len(list1)): process(list1[index], list2[index]) But I find it somehow rather ugly, because we generate yet

[Tutor] glpk

Hi, I would like to use the GNU linear programming kit, preferably with Python and under Windows. After some googling I found python-glpk and ctypes-glpk. The later seems to be an alternative but I get a feeling that the former is the one most people recommend (also, I'm not sure that it will work

Re: [Tutor] Generating Unique Permutations

I think you mean a multiset not a necklace. A necklace is invariant under rotations and reflections aabb=abba=bbaa=baab and abab=baba. Seems that some people name them bags instead of multiset. Maybe this can help you finding more examples? I see that you got a few already. /Robert Från: tutor

[Tutor] importing

Hi all, suppose I need to import a module inside a class and that I need to use it in to different methods. Is this is the way to do it? class test(): import time def method1(self): print 'method 1: ', time.clock() def method2(self): print 'method 2: ', time.clo

[Tutor] search path

I have some functions written in Matlab which I want to translate into Python so that my friends (how don't have Matlab) can enjoy them. My program does some work on a bunch of textfiles which I have put in the same directory as the Python-scriptfile with the function definitions. Things run pretty

[Tutor] character encoding

Hi, I'm puzzled by the character encodings which I get when I use Python with IDLE. The string '\xf6' represents a letter in the Swedish alphabet when coded with utf8. On our computer with MacOSX this gets coded as '\xc3\xb6' which is a string of length 2. I have configured IDLE to encode utf8 but

[Tutor] unsupported characters

Hi, I have problems using characters from the Swedish language. I tried the following in IDLE under MacOS X leopard (running Python 2.5.1) : S=’ö’ Displaying error message: “unsupported characters in input”. Running Python from a terminal I can’t even type the character, all that happe

Re: [Tutor] unsupported characters

On 8/17/08, Robert Johansson <[EMAIL PROTECTED]> wrote: > Hi, I have problems using characters from the Swedish language. I tried the > following in IDLE under MacOS X leopard (running Python 2.5.1) : > S='ö' > Displaying error message: "unsupported charac

[Tutor] Psyco module

Dear all, I'm trying to get my Python stuff to work on my new computer but I have problems getting the Psyco module installed. First I tried Python 2.6 (which worked fine) but discovered that Psyco wasn't prepared for it. I uninstalled Python 2.6 and when for 2.5.2 instead, but the problem with ins

[Tutor] function remember calls?

Hi all, This is my attempt to generate all pairs of relatively prime pairs of nonnegative integers (n, m) such that n + m <= N, using the Stern-Brocot tree. def rp_bounded_sum(n, i = 0, p = (0, 1), q = (1, 1), S = set([(0, 1), (1, 1)])): # Returns a set S with all relatively prime pairs (a,

[Tutor] Mac IDE

Hi, I know that there is a lot to read about different IDEs on the net but I have tried a couple and I'm still not pleased. My demands are not that high, when I'm under Windows I'm happy with IDLE (an interactive shell and debug) but the problem is with Mac (Python >= 2.7 and OS 10.7). IDLE had

Re: [Tutor] Mac IDE

Prins mailto:wpr...@gmail.com>> wrote: On 29 September 2011 10:42, Robert Johansson mailto:robert.johans...@math.umu.se>> wrote: Hi, I know that there is a lot to read about different IDEs on the net but I have tried a couple and I'm still not pleased. My demands are not that high,