Warning / Error codesΒΆ
The convention of Flake8 is to assign a code to each error or warning, like
the pep8
tool. These codes are used to configure the list of errors
which are selected or ignored.
Each code consists of an upper case ASCII letter followed by three digits. The recommendation is to use a different prefix for each plugin. A list of the known prefixes is published below:
E***
/W***
: pep8 errors and warningsF***
: PyFlakes codes (see below)C9**
: McCabe complexity plugin mccabeN8**
: Naming Conventions plugin pep8-naming
The original PyFlakes does not provide error codes. Flake8 patches the PyFlakes messages to add the following codes:
code | sample message |
---|---|
F401 | module imported but unused |
F402 | import module from line N shadowed by loop variable |
F403 | ‘from module import *’ used; unable to detect undefined names |
F404 | future import(s) name after other statements |
F811 | redefinition of unused name from line N |
F812 | list comprehension redefines name from line N |
F821 | undefined name name |
F822 | undefined name name in __all__ |
F823 | local variable name ... referenced before assignment |
F831 | duplicate argument name in function definition |
F841 | local variable name is assigned to but never used |