Composable command line interface toolkit, async version
AsyncClick ist a fork of Click that works well with trio or asyncio.
Click is a Python package for creating beautiful command line interfaces in a composable way with as little code as necessary. It's the "Command Line Interface Creation Kit". It's highly configurable but comes with sensible defaults out of the box.
It aims to make the process of writing command line tools quick and fun while also preventing any frustration caused by the inability to implement an intended CLI API.
AsyncClick in four points:
Install and update using pip
_:
.. code-block:: text
$ pip install asyncclick
AsyncClick supports Python 3.7 and newer, and PyPy3.
.. _pip: https://pip.pypa.io/en/stable/getting-started/
.. code-block:: python
import anyio
import asyncclick as click
# You can use all of click's features as per its documentation.
# Async commands are supported seamlessly; they just work.
@click.command()
@click.option("--count", default=1, help="Number of greetings.")
@click.option("--name", prompt="Your name", help="The person to greet.")
async def hello(count, name):
"""Simple program that greets NAME for a total of COUNT times."""
for x in range(count):
if x: await anyio.sleep(0.1)
click.echo(f"Hello, {name}!")
if __name__ == '__main__':
hello(_anyio_backend="trio") # or asyncio
# You can use your own event loop:
# import anyio
# async def main():
# await hello.main()
# if __name__ == '__main__':
# anyio.run(main)
# This is useful for testing.
.. note::
AsyncClick automagically starts an anyio event loop and runs your
code asynchronously. You don't need to use anyio.run
.
.. code-block:: text
$ python hello.py --count=3
Your name: Click
Hello, Click!
Hello, Click!
Hello, Click!
The Pallets organization develops and supports Click and other popular
packages. In order to grow the community of contributors and users, and
allow the maintainers to devote more time to the projects, please donate today
_.
.. _please donate today: https://palletsprojects.com/donate
The AsyncClick fork is maintained by Matthias Urlichs matthias@urlichs.de. It's not a lot of work, so if you'd like to motivate me, donate to the charity of your choice and tell me that you've done so. ;-)
AsyncClick
is sufficiently minimal to not have its own web page.
These links point to the original, non-async-enabled, version of Click
.