README for Pylint - http://pylint.pycqa.org/
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======
Pylint
It's not just a linter that annoys you!
Pylint is a Python static code analysis tool which looks for programming errors,
helps enforcing a coding standard, sniffs for code smells and offers simple refactoring
suggestions.
It's highly configurable, having special pragmas to control its errors and warnings
from within your code, as well as from an extensive configuration file.
It is also possible to write your own plugins for adding your own checks or for
extending pylint in one way or another.
It's a free software distributed under the GNU General Public Licence unless
otherwise specified.
Development is hosted on GitHub: https://github.com/PyCQA/pylint/
You can use the code-quality@python.org mailing list to discuss about
Pylint. Subscribe at https://mail.python.org/mailman/listinfo/code-quality/
or read the archives at https://mail.python.org/pipermail/code-quality/
Pull requests are amazing and most welcome.
Install
Pylint can be simply installed by running::
pip install pylint
If you are using Python 3.6+, upgrade to get full support for your version::
pip install pylint --upgrade
If you want to install from a source distribution, extract the tarball and run
the following command ::
python setup.py install
Do make sure to do the same for astroid, which is used internally by pylint.
For debian and rpm packages, use your usual tools according to your Linux distribution.
More information about installation and available distribution format
can be found here_.
Documentation
The documentation lives at http://pylint.pycqa.org/.
Pylint is shipped with following additional commands:
- pyreverse: an UML diagram generator
- symilar: an independent similarities checker
- epylint: Emacs and Flymake compatible Pylint
Testing
We use tox_ for running the test suite. You should be able to install it with::
pip install tox pytest
To run the test suite for a particular Python version, you can do::
tox -e py37
To run individual tests with tox, you can do::
tox -e py37 -- -k name_of_the_test
We use pytest_ for testing pylint, which you can use without using tox for a faster development cycle.
If you want to run tests on a specific portion of the code with pytest_, (pytest-cov_) and your local python version::
# ( pip install pytest-cov )
# Everything:
python3 -m pytest tests/
# Everything in tests/message with coverage for the relevant code:
python3 -m pytest tests/message/ --cov=pylint.message
coverage html
# Only the functional test "missing_kwoa_py3":
python3 -m pytest "tests/test_functional.py::test_functional[missing_kwoa_py3]"
Do not forget to clone astroid_ and install the last version::
git clone https://github.com/PyCQA/astroid.git
# From source
python3 astroid/setup.py build sdist
pip3 install astroid/dist/astroid*.tar.gz
# Using an editable installation
cd astroid
python3 -m pip install -e .
For more detailed information, check the documentation.
.. _here: http://pylint.pycqa.org/en/latest/user_guide/installation.html
.. _tox: https://tox.readthedocs.io/en/latest/
.. _pytest: https://docs.pytest.org/en/latest/
.. _pytest-cov: https://pypi.org/project/pytest-cov/
.. _astroid: https://github.com/PyCQA/astroid
License
pylint is, with a few exceptions listed below, GPLv2 <COPYING>_.
The icon files are licensed under the CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0/>_ license:
doc/logo.png <doc/logo.png>_doc/logo.svg <doc/logo.svg>_