Pylama
Code audit tool for Python and JavaScript. Pylama wraps these tools:
- pycodestyle (formerly pep8) © 2012-2013, Florent Xicluna;
- pydocstyle (formerly pep257 by Vladimir Keleshev) © 2014, Amir Rachum;
- PyFlakes © 2005-2013, Kevin Watters;
- Mccabe © Ned Batchelder;
- Pylint © 2013, Logilab (should be installed 'pylama_pylint' module);
- Radon © Michele Lacchia
- gjslint © The Closure Linter Authors (should be installed 'pylama_gjslint' module);
- eradicate © Steven Myint;
- Mypy © Jukka Lehtosalo and contributors;
Docs are available at https://pylama.readthedocs.org/. Pull requests with documentation enhancements and/or fixes are awesome and most welcome.
Contents
Requirements:
- Python (2.7, 3.4, 3.5, 3.6, 3.7)
- To use JavaScript checker (
gjslint) you need to installpython-gflagswithpip install python-gflags. - If your tests are failing on Win platform you are missing:
curses- http://www.lfd.uci.edu/~gohlke/pythonlibs/ (The curses library supplies a terminal-independent screen-painting and keyboard-handling facility for text-based terminals)
Installation:
Pylama could be installed using pip: ::
$ pip install pylama
Quickstart
Pylama is easy to use and really fun for checking code quality. Just run pylama and get common output from all pylama plugins (pycodestyle, PyFlakes and etc)
Recursive check the current directory.
$ pylama
Recursive check a path.
$ pylama <path_to_directory_or_file>
Ignore errors
$ pylama -i W,E501
Note
You could choose a group erros D,`E1` and etc or special errors C0312
Choose code checkers
$ pylama -l "pycodestyle,mccabe"
Choose code checkers for JavaScript:
$ pylama --linters=gjslint --ignore=E:0010 <path_to_directory_or_file>
Set Pylama (checkers) options
Command line options
$ pylama --help
usage: pylama [-h] [--verbose] [--version]
[--format {pep8,pycodestyle,pylint,parsable}] [--select SELECT]
[--sort SORT] [--linters LINTERS] [--ignore IGNORE]
[--skip SKIP] [--report REPORT] [--hook] [--concurrent]
[--options FILE] [--force] [--abspath]
[paths [paths ...]]
Code audit tool for python.
positional arguments:
paths Paths to files or directories for code check.
optional arguments:
-h, --help show this help message and exit
--verbose, -v Verbose mode.
--version show program's version number and exit
--format {pep8,pycodestyle,pylint,parsable}, -f {pep8,pycodestyle,pylint,parsable}
Choose errors format (pycodestyle, pylint, parsable).
--select SELECT, -s SELECT
Select errors and warnings. (comma-separated list)
--sort SORT Sort result by error types. Ex. E,W,D
--linters LINTERS, -l LINTERS
Select linters. (comma-separated). Choices are mccabe,
pep257,pydocstyle,pep8,pycodestyle,pyflakes,pylint,iso
rt.
--ignore IGNORE, -i IGNORE
Ignore errors and warnings. (comma-separated)
--skip SKIP Skip files by masks (comma-separated, Ex.
*/messages.py)
--report REPORT, -r REPORT
Send report to file [REPORT]
--hook Install Git (Mercurial) hook.
--concurrent, --async
Enable async mode. Useful for checking a lot of files.
Unsupported with pylint.
--options FILE, -o FILE
Specify configuration file. Looks for pylama.ini,
setup.cfg, tox.ini, or pytest.ini in the current
directory (default: None).
--force, -F Force code checking (if linter doesn't allow)
--abspath, -a Use absolute paths in output.
File modelines
You can set options for Pylama inside a source file. Use pylama modeline for this.
Format:
# pylama:{name1}={value1}:{name2}={value2}:...
.. Somethere in code # pylama:ignore=W:select=W301
Disable code checking for current file:
.. Somethere in code # pylama:skip=1
Those options have a higher priority.
Skip lines (noqa)
Just add # noqa in end of line to ignore.
def urgent_fuction():
unused_var = 'No errors here' # noqa
Configuration file
Pylama looks for a configuration file in the current directory.
The program searches for the first matching ini-style configuration file in the directories of command line argument. Pylama looks for the configuration in this order:
pylama.ini setup.cfg tox.ini pytest.ini
The "--option" / "-o" argument can be used to specify a configuration file.
Pylama searches for sections whose names start with pylama.
The "pylama" section configures global options like linters and skip.
[pylama] format = pylint skip = */.tox/*,*/.env/* linters = pylint,mccabe ignore = F0401,C0111,E731
Set Code-checkers' options
You could set options for special code checker with pylama configurations.
[pylama:pyflakes] builtins = _ [pylama:pycodestyle] max_line_length = 100 [pylama:pylint] max_line_length = 100 disable = R
See code-checkers' documentation for more info. Let's notice that dashes are replaced by underscores (e.g. Pylint's "max-line-length" becomes "max_line_length").
Set options for file (group of files)
You could set options for special file (group of files) with sections:
The options have a higher priority than in the pylama section.
[pylama:*/pylama/main.py] ignore = C901,R0914,W0212 select = R [pylama:*/tests.py] ignore = C0110 [pylama:*/setup.py] skip = 1
Pytest integration
Pylama has Pytest support. The package automatically registers itself as a pytest plugin during installation. Pylama also supports pytest_cache plugin.
Check files with pylama
pytest --pylama ...
Recommended way to set pylama options when using pytest — configuration files (see below).
Writing a linter
You can write a custom extension for Pylama. Custom linter should be a python module. Name should be like 'pylama_<name>'.
In 'setup.py', 'pylama.linter' entry point should be defined.
setup(
# ...
entry_points={
'pylama.linter': ['lintername = pylama_lintername.main:Linter'],
}
# ...
)
'Linter' should be instance of 'pylama.lint.Linter' class. Must implement two methods:
'allow' takes a path and returns true if linter can check this file for errors. 'run' takes a path and meta keywords params and returns a list of errors.
Example:
Just a virtual 'WOW' checker.
setup.py:
setup(
name='pylama_wow',
install_requires=[ 'setuptools' ],
entry_points={
'pylama.linter': ['wow = pylama_wow.main:Linter'],
}
# ...
)
pylama_wow.py:
from pylama.lint import Linter as BaseLinter
class Linter(BaseLinter):
def allow(self, path):
return 'wow' in path
def run(self, path, **meta):
with open(path) as f:
if 'wow' in f.read():
return [{
lnum: 0,
col: 0,
text: 'Wow has been finded.',
type: 'WOW'
}]
Run pylama from python code
from pylama.main import check_path, parse_options
# Use and/or modify 0 or more of the options defined as keys in the variable my_redefined_options below.
# To use defaults for any option, remove that key completely.
my_redefined_options = {
'linters': ['pep257', 'pydocstyle', 'pycodestyle', 'pyflakes' ...],
'ignore': ['D203', 'D213', 'D406', 'D407', 'D413' ...],
'select': ['R1705' ...],
'sort': 'F,E,W,C,D,...',
'skip': '*__init__.py,*/test/*.py,...',
'async': True,
'force': True
...
}
# relative path of the directory in which pylama should check
my_path = '...'
options = parse_options([my_path], **my_redefined_options)
errors = check_path(options, rootdir='.')
Bug tracker
If you have any suggestions, bug reports or annoyances please report them to the issue tracker at https://github.com/klen/pylama/issues
Contributing
Development of pylama happens at GitHub: https://github.com/klen/pylama
Contributors
See AUTHORS.
License
Licensed under a BSD license.
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