====================================================
pluggy - A minimalist production ready plugin system
====================================================
|pypi| |conda-forge| |versions| |travis| |appveyor| |gitter| |black| |codecov|
This is the core framework used by the `pytest`_, `tox`_, and `devpi`_ projects.
Please `read the docs`_ to learn more!
A definitive example
====================
.. code-block:: python
import pluggy
hookspec = pluggy.HookspecMarker("myproject")
hookimpl = pluggy.HookimplMarker("myproject")
class MySpec(object):
"""A hook specification namespace.
"""
@hookspec
def myhook(self, arg1, arg2):
"""My special little hook that you can customize.
"""
class Plugin_1(object):
"""A hook implementation namespace.
"""
@hookimpl
def myhook(self, arg1, arg2):
print("inside Plugin_1.myhook()")
return arg1 + arg2
class Plugin_2(object):
"""A 2nd hook implementation namespace.
"""
@hookimpl
def myhook(self, arg1, arg2):
print("inside Plugin_2.myhook()")
return arg1 - arg2
# create a manager and add the spec
pm = pluggy.PluginManager("myproject")
pm.add_hookspecs(MySpec)
# register plugins
pm.register(Plugin_1())
pm.register(Plugin_2())
# call our ``myhook`` hook
results = pm.hook.myhook(arg1=1, arg2=2)
print(results)
Running this directly gets us::
$ python docs/examples/toy-example.py
inside Plugin_2.myhook()
inside Plugin_1.myhook()
[-1, 3]
.. badges
.. |pypi| image:: https://img.shields.io/pypi/v/pluggy.svg
:target: https://pypi.org/pypi/pluggy
.. |versions| image:: https://img.shields.io/pypi/pyversions/pluggy.svg
:target: https://pypi.org/pypi/pluggy
.. |travis| image:: https://img.shields.io/travis/pytest-dev/pluggy/master.svg
:target: https://travis-ci.org/pytest-dev/pluggy
.. |appveyor| image:: https://img.shields.io/appveyor/ci/pytestbot/pluggy/master.svg
:target: https://ci.appveyor.com/project/pytestbot/pluggy
.. |conda-forge| image:: https://img.shields.io/conda/vn/conda-forge/pluggy.svg
:target: https://anaconda.org/conda-forge/pytest
.. |gitter| image:: https://badges.gitter.im/pytest-dev/pluggy.svg
:alt: Join the chat at https://gitter.im/pytest-dev/pluggy
:target: https://gitter.im/pytest-dev/pluggy?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
.. |black| image:: https://img.shields.io/badge/code%20style-black-000000.svg
:target: https://github.com/ambv/black
.. |codecov| image:: https://codecov.io/gh/pytest-dev/pluggy/branch/master/graph/badge.svg
:target: https://codecov.io/gh/pytest-dev/pluggy
:alt: Code coverage Status
.. links
.. _pytest:
http://pytest.org
.. _tox:
https://tox.readthedocs.org
.. _devpi:
http://doc.devpi.net
.. _read the docs:
https://pluggy.readthedocs.io/en/latest/