numcat: Prepent line numbers

numcat.py

import sys

def prepend_line_numbers():
    for line_number, line in enumerate(sys.stdin, start=1):
        # Remove trailing newline character if present
        stripped_line = line.rstrip('\n')
        print(f"{line_number}: {stripped_line}")

if __name__ == "__main__":
    prepend_line_numbers()