.. docs-index-start
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========
Overview
========
|pypi-release| |downloads| |tests-status| |coverage| |dev-docs|
**Cloup** — originally from "**Cl**\ick + option gr\ **oup**\s" — enriches
`Click <https://github.com/pallets/click>`_ with several features that make it
more expressive and configurable:
- **option groups** and an (optional) help section for positional arguments
- **constraints**, like ``mutually_exclusive``, that can be applied to option groups
or to any group of parameters, even *conditionally*
- **subcommand aliases**
- **subcommands sections**, i.e. the possibility of organizing the subcommands of a
``Group`` in multiple help sections
- a **themeable HelpFormatter** that:
- has more parameters for adjusting widths and spacing, which can be provided
at the context and command level
- use a different layout when the terminal width is below a certain threshold
in order to improve readability
- suggestions like "did you mean <subcommand>?" when you mistype a subcommand.
Moreover, Cloup improves on **IDE support** providing decorators with *detailed*
type hints and adding the static methods ``Context.settings()`` and
``HelpFormatter.settings()`` for creating dictionaries of settings.
Cloup is **statically type-checked** with MyPy in strict mode and extensively **tested**
against multiple versions of Python with nearly 100% coverage.
A simple example
================
.. code-block:: python
from cloup import (
HelpFormatter, HelpTheme, Style,
command, option, option_group
)
from cloup.constraints import RequireAtLeast, mutually_exclusive
# Check the docs for all available arguments of HelpFormatter and HelpTheme.
formatter_settings = HelpFormatter.settings(
theme=HelpTheme(
invoked_command=Style(fg='bright_yellow'),
heading=Style(fg='bright_white', bold=True),
constraint=Style(fg='magenta'),
col1=Style(fg='bright_yellow'),
)
)
# In a multi-command app, you can pass formatter_settings as part
# of your context_settings so that they are propagated to subcommands.
@command(formatter_settings=formatter_settings)
@option_group(
"Cool options",
option('--foo', help='This text should describe the option --foo.'),
option('--bar', help='This text should describe the option --bar.'),
constraint=mutually_exclusive,
)
@option_group(
"Other cool options",
"This is the optional description of this option group.",
option('--pippo', help='This text should describe the option --pippo.'),
option('--pluto', help='This text should describe the option --pluto.'),
constraint=RequireAtLeast(1),
)
def cmd(**kwargs):
"""This is the command description."""
pass
if __name__ == '__main__':
cmd(prog_name='invoked-command')
.. image:: https://raw.githubusercontent.com/janLuke/cloup/master/docs/_static/basic-example.png
:alt: Basic example --help screenshot
If you don't provide ``--pippo`` or ``--pluto``:
.. code-block:: text
Usage: invoked-command [OPTIONS]
Try 'invoked-command --help' for help.
Error: at least 1 of the following parameters must be set:
--pippo
--pluto
This simple example just scratches the surface. Read more in the documentation
(links below).
.. docs-index-end
Links
=====
* Documentation (release_ | development_)
* `Changelog <https://cloup.readthedocs.io/en/stable/pages/changelog.html>`_
* `GitHub repository <https://github.com/janLuke/cloup>`_
* `Q&A and discussions <https://github.com/janLuke/cloup/discussions>`_
.. _release: https://cloup.readthedocs.io/en/stable/#user-guide
.. _development: https://cloup.readthedocs.io/en/latest/#user-guide
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