#!/usr/bin/env python3 import fileinput import sys if __name__ == "__main__": if len(sys.argv) < 3: print(f"Usage: {sys.argv[0]} port filenames") sys.exit() port = sys.argv[1] matches = False for line in fileinput.input(sys.argv[2:]): if line.startswith("["): matches = port in line if matches: print(line, end="")