Cat_command.py

#!/usr/bin/python

import argparse
from pathlib import Path
from sys import stderr, stdout
import os


class CatError(Exception):
    pass


class Logger:
    def __init__(self, verbosity=False):
        self.verbose = verbosity

    def error(self, message):
        print(f"ERROR: {message}")


logger = Logger()

"""
    Read the selected text file 
    Example:
    your/path/file.txt
"""


def readFile(src: Path):

    """
    if the given path is a directory
    ERROR the path is a directory
    """
    if src.is_dir():

        logger.error(f"The path {src}: is a directory")

    else:

        with open(src, "r") as f:
            for lines in f:
                print(lines, end="")


def cli() -> argparse.Namespace:
    parser = argparse.ArgumentParser(
        prog="cat",
        description="cat command implementation in python",
        epilog="Example: your/path/file.txt",
    )

    parser.add_argument("source", type=Path, help="Source file")

    return parser.parse_args()


def main():

    args = cli()

    try:

        readFile(args.source)

    except CatError as e:

        logger.error(e)

        exit(1)

    except KeyboardInterrupt:

        logger.error("\nInterrupt")


"""
    Start the program
"""
if __name__ == "__main__":
    main()