py_static_check

py_static_check can statically check your Python code for a lot of common errors. It uses a modified pyflakes code and extends with following things:

• Ability to specify what star imports resolve to (-s argument)
• Ability to ignore unused import warnings (-i argument)
• Better sorting of warnings/errors

For more information check out:

• http://amix.dk/blog/post/19665#py-static-check-Statically-check-your-Python-code
• http://amix.dk/blog/post/19361#Static-checking-Python-code

To install it do following:

sudo easy_install py_static_check

Here are some of the things py_static_check can do.

Catch undefined names, even for star imports

Example code::

from os import *

def function_with_error():
    print path
    print paths

star_imports.py::

import os
STAR_IMPORTS = {
    'os': os.__all__,
}

When ran with py_static_check::

$ py_static_check -s tests/star_import.py tests/undefined_name_star.py
tests/undefined_name.py:5: undefined name 'paths

Ignore not used warnings

Exampel code::

from os import path

When ran with py_static_check -i option::

$ py_static_check -i tests/ignore_not_used.py

$ py_static_check tests/ignore_not_used.py
tests/ignore_not_used.py:10: 'path' imported but unused

Assigned but never used

Like pyflakes it can catch a lot of errors, such as defining a variable without using it.

Exampel code::

def some_function():
    def inner_fn():
        local_var = ""

When ran with py_static_check::

$ py_static_check tests/assigned_but_never_used.py

tests/assigned_but_never_used.py:8: local variable 'local_var' is assigned to but never used

Copyright: 2011 by amix License: MIT.