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pythonbatch-filecomparedifference

Compare 2 text files and output a difference

I have two text files:

First text file:

[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password
[email protected]:password

2nd text file:

[email protected]:password
[email protected]:password

How can I output the differences between them regardless of the line number? I want to output a third file:

third text file:

[email protected]:password
[email protected]:password
[email protected]:password
Solution

  • Assuming that the username and password are separated by colon then you could do this:

    files = ['file1.txt', 'file2.txt']
usernames = [set(), set()]
for i, file in enumerate(files):
    with open(file) as infile:
        for line in infile:
            usernames[i].add(line.split(':')[0])
for d in usernames[0] - usernames[1]:
    print(d)