Change text in file with Python

Question

def false_to_true():
    name = input(\"Input name: \")
    file=open(\"users.txt\",\"r\")
    lines = file.readlines()
    file.close()
    for line in lines:
              


        

Answer 1

Open the input and output files, make a set out of the user-input names (terminated by a blank line), then create a generator for strings of the proper format that check for membership in the user-input names, then write these lines to the output file:

with open('names.txt') as f, open('result.txt', 'w') as out:
    names = {name for name in iter(input, '')}
    f = ('{}/{}/{}'.format(a,b,'True\n' if a in names else c) for a,b,c in (line.split('/') for line in f))
    output.writelines(f)