Python reads the content of a document and extracts it for processing

Question

There is a text document 1, the data is divided into lines, as follows:
12345
32561
96854
12368
52697
......
Another Text document 2 is also data in the same format, as follows:
112233
123456
789652
123698
125896
......
Want to read document 1 For each line of document 2, extract each line of data into a variable; then read each line of document 2, extract each line of data into another variable, and then operate these two variables. How to do this?

Answer 1

with open('a.txt') as f:
    a = f.readlines()
    
with open('b.txt') as f:
    b = f.readlines()
    

Answer 2

with open('a.txt') as f1, open('b.txt') as f2:
    a, b = f1.readlines(), f2.readlines()
    #接下来就可以操作a, b了