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Clize

Documentation Status Join the chat at https://gitter.im/epsy/clize https://github.com/epsy/clize/actions/workflows/ci.yml/badge.svg?branch=master https://coveralls.io/repos/epsy/clize/badge.svg?branch=master

Clize is an argument parser for Python. You can use Clize as an alternative to argparse if you want an even easier way to create command-line interfaces.

With Clize, you can:

  • Create command-line interfaces by creating functions and passing them to clize.run.
  • Enjoy a CLI automatically created from your functions' parameters.
  • Bring your users familiar --help messages generated from your docstrings.
  • Reuse functionality across multiple commands using decorators.
  • Extend Clize with new parameter behavior.

Here's an example:

from clize import run

def hello_world(name=None, *, no_capitalize=False):
    """Greets the world or the given name.

    :param name: If specified, only greet this person.
    :param no_capitalize: Don't capitalize the given name.
    """
    if name:
        if not no_capitalize:
            name = name.title()
        return 'Hello {0}!'.format(name)
    return 'Hello world!'

if __name__ == '__main__':
    run(hello_world)

The python code above can now be used on the command-line as follows:

$ pip install clize
$ python3 hello.py --help
    Usage: hello.py [OPTIONS] name

    Greets the world or the given name.

    Positional arguments:
      name   If specified, only greet this person.

    Options:
      --no-capitalize   Don't capitalize the given name.

    Other actions:
      -h, --help   Show the help
$ python3 hello.py
Hello world!
$ python3 hello.py john
Hello John!
$ python3 hello.py dave --no-capitalize
Hello dave!

You can find the documentation and tutorials at http://clize.readthedocs.io/

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CLIze: Turn Python functions into command-line interfaces

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