A trivial python script to follow the `tail`ing logs such as `dmesg -w`

myfilter.py

#!/usr/bin/env python3
#
# Example usage:
#   dmesg -w | myfilter.py -x foo bar baz
#

import sys
import re
import argparse

def parse_args():
    parser = argparse.ArgumentParser(
        description="Filter out lines matching any of the given patterns."
    )
    parser.add_argument(
        "-x", "--excludes", nargs="+", required=True,
        help="Regex patterns to exclude (any match will skip the line)"
    )
    return parser.parse_args()

def main():
    args = parse_args()
    patterns = [re.compile(p) for p in args.excludes]

    for line in sys.stdin:
        if any(p.search(line) for p in patterns):
            continue
        print(line, end='')

if __name__ == "__main__":
    main()