pip install cliff mkdir mycommandtool cd mycommandtool python -m venv venv venv\Scripts\activate.bat source venv/bin/activate python from cliff.command import Command class Greeting(Command): "Print a greeting message" def take_action(self, parsed_args): self.app.stdout.write("Hello, World! ") class MyCommandTool(Command): "My custom command line tool" def __init__(self, app, app_args): super(MyCommandTool, self).__init__(app, app_args) self.command = Greeting(self.app, self.app_args) def get_parser(self, prog_name): parser = super(MyCommandTool, self).get_parser(prog_name) subparsers = parser.add_subparsers() self.command.get_parser(subparsers) return parser def take_action(self, parsed_args): self.command.run(parsed_args) def main(argv=sys.argv[1:]): my_tool = MyCommandTool(None, None) return my_tool.run(argv) if __name__ == '__main__': sys.exit(main()) python from setuptools import setup, find_packages setup( name='mycommandtool', version='0.1', packages=find_packages(), include_package_data=True, install_requires=[ 'cliff', ], entry_points={ 'console_scripts': [ 'mycommand = mycommandtool:main' ] }, ) pip install -e . mycommand greeting