python compare two files content

1with open('some_file_1.txt', 'r') as file1:
2    with open('some_file_2.txt', 'r') as file2:
3        same = set(file1).intersection(file2)
4
5same.discard('\n')
6
7with open('some_output_file.txt', 'w') as file_out:
8    for line in same:
9        file_out.write(line)

1>>> import filecmp
2>>> filecmp.cmp('file1.txt', 'file1.txt')
3True
4>>> filecmp.cmp('file1.txt', 'file2.txt')
5False

1import difflib
2import sys
3
4# git-styled output
5
6with open('/tmp/hosts0', 'r') as hosts0:
7    with open('/tmp/hosts1', 'r') as hosts1:
8        diff = difflib.unified_diff(
9            hosts0.readlines(),
10            hosts1.readlines(),
11            fromfile='hosts0',
12            tofile='hosts1',
13        )
14        for line in diff:
15            sys.stdout.write(line)