Transferring numbers from a text file to an array

Question

I have a text file that has three lines and would like the first number of each line stored in an array, the second in another, so on and so fourth. And for it to print the array out. The text file:

0,1,2,3,0
1,3,0,0,2
2,0,3,0,1

The code I'm using (I've only showed the first array for simplicity):

f=open("ballot.txt","r")
for line in f:
    num1=line[0]
    num1=[]
    print(num1)

I expect the result for it to print out the first number of each line:

0
1
2

the actual result i get is

[]
[]
[]

Answer 1

It looks like you reset num1 right? Every time num1 is reseted to an empty list before printing it.

f=open("ballot.txt","r")
for line in f:
    num1=line[0]
    #num1=[] <-- remove this line
    print(num1)

This will return the first char of the line. If you want the first number (i.e. everything before the first coma), you can try this:

f=open("ballot.txt","r")
for line in f:
    num1=line.split(',')[0]
    print(num1)