MostCommon.py

#!/usr/bin/env python
import argparse
import sys
from collections import Counter


def main(paths, n=100):
    counter = Counter()
    for path in paths:
        print(path)
        with open(path) as f:
            for line in f:
                if line.strip():
                    counter[line.rstrip()] += 1
    largest = max(counter.values()) if counter else 0
    ljust = len(str(largest))
    for line, count in counter.most_common(n):
        print(str(count).ljust(ljust), line)


if __name__ == "__main__":
    my_parser = argparse.ArgumentParser(
        description="Count the most common lines in files"
    )
    my_parser.add_argument(
        "-n",
        metavar="cap",
        type=int,
        default=100,
        help="Max number shown",
    )
    my_parser.add_argument(
        "paths",
        # metavar="path",
        nargs="+",
        type=str,
        help="the path to list",
    )
    args = my_parser.parse_args()
    sys.exit(main(**vars(args)))