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codeql/python/ql/src/Functions/NonCls.ql
2025-04-29 16:23:22 +02:00

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/**
* @name First parameter of a class method is not named 'cls'
* @description By the PEP8 style guide, the first parameter of a class method should be named `cls`.
* @kind problem
* @tags maintainability
* readability
* convention
* quality
* @problem.severity recommendation
* @sub-severity high
* @precision high
* @id py/not-named-cls
*/
import python
import MethodArgNames
from Function f, string message
where
firstArgShouldReferToClsAndDoesnt(f) and
(
if exists(f.getArgName(0))
then
message =
"Class methods or methods of a type deriving from type should have 'cls', rather than '" +
f.getArgName(0) + "', as their first parameter."
else
message =
"Class methods or methods of a type deriving from type should have 'cls' as their first parameter."
)
select f, message