A linter for Cython files
Project description
cython-lint
A tool and pre-commit hook to lint Cython files.
Installation
$ pip install cython-lint
Usage as a pre-commit hook
See pre-commit for instructions
Sample .pre-commit-config.yaml:
- repo: https://github.com/MarcoGorelli/cython-lint
rev: v0.9.0
hooks:
- id: cython-lint
- id: double-quote-strings
Command-line example
$ cython-lint my_file_1.pyx my_file_2.pyx
my_file_1.pyx:54:5: 'get_conversion_factor' imported but unused
my_file_2.pyx:1112:38: 'mod' defined but unused
my_file_3.pyx:4:9: dangerous default value!
my_file_3.pyx:5:9: comma after base type in definition
Configuration
The following configuration options are available:
- exclude lines by including a
# no-cython-lintcomment (analogous to# noqainflake8); - use the command-line argument
--max-line-lengthto control the maximum line length used by pycodestyle; - use the command-line argument
--no-pycodestyleif you don't want the pycodestyle checks.
Which checks are implemented?
- variable defined but unused
- variable imported but unused
- comma after base type definition (e.g.
cdef ndarray, arr) - f-string without placeholders
- dict key repeated
- dict key variable repeated
- if-statement with tuple condition (always true...)
- assert statement with tuple condition (always true...)
- dangerous default value
- repeated element in set
.strip,.rstrip, or.lstripused with repeated characters- comparison between constants
- late-binding closures https://docs.python-guide.org/writing/gotchas/#late-binding-closures
pycodestylenitpicks, which you can turn off with--no-pycodestyle
In addition, the following automated fixers are implemented:
- double-quote-strings (replace single quotes with double quotes, like the
blackformatter does)
More to come! Requests welcome!
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