entrypoint2 is an easy to use argparse based command-line interface for python modules, fork of entrypoint. It translates function signature and documentation to argparse configuration.

Links:

• home: https://github.com/ponty/entrypoint2
• documentation: http://entrypoint2.readthedocs.org
• PYPI: https://pypi.python.org/pypi/entrypoint2

Goals:

• simplicity: only one decorator to add to existing code

Features:

• good for protoyping or simple CLI
• generate CLI parameters from function signature
• generate CLI documentation from python documentation
• the decorated function has the same behavior as without the entrypoint2 decorator
• boolean parameters are toggle flags (e.g. --verbose)
• function signature is preserved so it can be called both from command-line and external module
• function name, doc and module are preserved so it can be used with sphinx autodoc
• sphinx autodoc documentation style is supported: :param x: this is x
• automatic --version flag, which prints version variable from the current module (__version__, VERSION, ..)
• automatic --debug flag, which turns on logging
• short flags are generated from long flags automatically (e.g. --parameter -> -p)
• unit tests
• supported python versions: 2.7, 3.6, 3.7, 3.8
• support for repeating arguments

Similar projects:

• entrypoint
• plac
• baker
• argh
• opster
• commandline
• optfunc: this has the same concept
• commando (1)
• commando (2)
• argparse
• optparse
• plumbum

Example:

from entrypoint2 import entrypoint

__version__ = '3.2'

@entrypoint
def add(one, two=4, three=False): 
    ''' This function adds three numbers.

    one: first number to add
    two: second number to add
    '''

Generated help:

$ python3 -m entrypoint2.examples.hello --help
usage: hello.py [-h] [-t TWO] [--three] [--version] [--debug] one

This function adds two number.

positional arguments:
  one                first number to add

optional arguments:
  -h, --help         show this help message and exit
  -t TWO, --two TWO  second number to add
  --three
  --version          show program's version number and exit
  --debug            set logging level to DEBUG

Printing version:

$ python3 -m entrypoint2.examples.hello --version
3.2

install:

pip install entrypoint2