Simple Python script to SHA-1 hash each line of a file

hash_lines.py

import hashlib
import sys


def hash_lines(inputfile, outputfile):
    """Hash all lines of the input file and populate the output."""
    count = 0
    with open(outputfile, 'wt') as output:
        with open(inputfile, 'r') as input_lines:
            for line in input_lines:
                output.write('%s\n' % hashlib.sha1(line.strip().encode('utf-8')).hexdigest())
                count += 1
    print('%d lines hashed.' % count)


if __name__ == '__main__':
    hash_lines(*sys.argv[1:])