Question

I am a python newbie.

I want to read a text file which reads something like this

1345..
245..
..456

and store it in a list of lists of integers. I want to keep the numbers and replaces the periods by 0s.How do i do it?

EDIT:
Apologize for the ambiguous output spec

p.s I want the output to be a list of list

[ [1,3,4,5,0,0],
[2,4,5,0,0],
[0,0,4,5,6]]

Answer 1

with open('yourfile') as f:
    lst = [ map(int,x.replace('.','0')) for x in f ]

Which is the same thing as the following nested list-comp:

lst = [ [int(val) for val in line.replace('.','0')] for line in f]

Here I used str.replace to change the '.' to '0' before converting to an integer.