Question

I’m trying to create a game. I have a list. I want to take the items in this list and randomly append them to indexes in a list matrix. Think about a grid and an item moving around randomly through this grid.

import random


fishlist = ["salmon", "carp", "bass", "catfish"]


grid = [
            [1,2,3],
            [4,5,6],
            [7,8,9],
            ]

I want to replace each of those numbers with a random fish. From there I want the fish to be able to move around the grid. What is the best way to go about this? Thanks for the help.

Answer 1

Try this

>>> grid = [
            [1,2,3],
            [4,5,6],
            [7,8,9],
            ]
>>> fishlist = ["salmon", "carp", "bass", "catfish"]

>>> [r.__setitem__(i,random.choice(fishlist)) for r in grid for i in xrange(0,len(r))]
[None, None, None, None, None, None, None, None, None]
>>> print grid
[['salmon', 'salmon', 'carp'], ['carp', 'salmon', 'bass'], ['bass', 'salmon', 'bass']]
>>> 

To Move the fish try this

>>> def Move(grid):
    rSrc=random.choice(grid)
    rDest=random.choice(grid)
    a,b=random.randint(0,len(rSrc)-1),random.randint(0,len(rSrc)-1)
    rSrc[a],rDest[b]=rDest[b],rSrc[a]
    >>> grid
[['carp', 'catfish', 'catfish'], ['catfish', 'carp', 'salmon'], ['catfish', 'catfish', 'carp']]
>>> Move(grid)
>>> grid
[['catfish', 'catfish', 'carp'], ['catfish', 'carp', 'salmon'], ['catfish', 'catfish', 'carp']]
>>> 

Using Loop

>>> grid = [
            [1,2,3],
            [4,5,6],
            [7,8,9],
            ]
>>> fishlist = ["salmon", "carp", "bass", "catfish"]
>>> for r in grid:
    for i in xrange(0,len(r)):
        r[i]=random.choice(fishlist)


>>> grid
[['bass', 'catfish', 'carp'], ['catfish', 'salmon', 'salmon'], ['bass', 'salmon', 'catfish']]
>>>