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- #!/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()
|
