flake8-cognitive-complexity
An extension for flake8 that validates cognitive functions complexity.
Cognitive complexity is analog of cyclomatic complexity, that measure
how difficult to understand piece of code. Introduced by G. Ann Campbell
and currently used by SonarSource, CodeClimate and others.
You can find more readings about cognitive complexity in
cognitive-complexity readme file.
Default complexity is 7, can be configured via --max-cognitive-complexity
option.
Installation
pip install flake8-cognitive-complexity
Example
def f(a, b):
if a:
for i in range(b):
if b:
return 1
Usage:
$ flake8 --max-cognitive-complexity=3 test.py
text.py:1:5: CCR001 Cognitive complexity is too high (6 > 3)
Tested on Python 3.7.x and flake8 3.7.8.
Error codes
Error code | Description |
---|
CCR001 | Cognitive complexity is too high (X > Y) |