[Tutor] An Introduction and a question (continuing)
kent37 at tds.net
Sat Jun 10 13:08:04 CEST 2006
Michael Sullivan wrote:
> OK. I've got it working this far. Now I want the script to generate
> eight pieces, each with a random colour. Here's my current code:
> #!/usr/bin/env python
> import random
> import time
> import math
> class LinePuzzlePiece:
> """This class defines a single playing piece for LinePuzzle"""
> def __init__(self):
The above statement initializes the random number generator with the
time *module*, not the current time. The time module never changes. So
every time you need a random number your are initializing the generator
with the same constant. That's why you always get the same number.
The docs for random.seed() say, "If x is omitted or None, current system
time is used; current system time is also used to initialize the
generator when the module is first imported." So you could omit the time
argument to use the actual time; better is to omit the call completely
and let the module init itself when you load it.
> index = int(math.floor(random.uniform(0, 8)))
> colorlist = ["red", "blue", "green", "yellow", "purple", "cyan",
> "orange", "white"]
> self.color = colorlist[index]
random.choice() would be simpler here.
> def printcolor(self):
> print self.color
> piececount = 0
> mypiece = ["", "", "", "", "", "", "", "", ""]
> while (piececount < 9):
> mypiece[piececount] = LinePuzzlePiece()
> piececount += 1
> The problem is that while eight pieces are created and assigned a
> colour, the colour is always the same. I need the colours of the pieces
> to be in a somewhat random order. What am I doing wrong?
> Tutor maillist - Tutor at python.org
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