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codeql/python/ql/src/Statements/DocStrings.ql
Taus a276f721f7 Python: Add ternary overridesMethod
This one also allows easy access to the method being overridden and the
class on which it resides. This let's us simplify DocStrings.ql
accordingly.
2026-03-23 15:21:27 +00:00

52 lines
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/**
* @name Missing docstring
* @description Omitting documentation strings from public classes, functions or methods
* makes it more difficult for other developers to maintain the code.
* @kind problem
* @tags maintainability
* readability
* @problem.severity recommendation
* @sub-severity low
* @precision medium
* @id py/missing-docstring
*/
/*
* NOTE: precision of 'medium' reflects the lack of precision in the underlying rule.
* Do we care whether a function has a docstring? That often depends on the reader of that docstring.
*/
import python
private import semmle.python.dataflow.new.internal.DataFlowDispatch
predicate needs_docstring(Scope s) {
s.isPublic() and
(
not s instanceof Function
or
function_needs_docstring(s)
)
}
predicate function_needs_docstring(FunctionMetrics f) {
not exists(Function base |
DuckTyping::overridesMethod(f, _, base) and
not function_needs_docstring(base)
) and
f.getName() != "lambda" and
(f.getNumberOfLinesOfCode() - count(f.getADecorator())) > 2 and
not DuckTyping::isPropertyAccessor(f)
}
string scope_type(Scope s) {
result = "Module" and s instanceof Module and not s.(Module).isPackage()
or
result = "Class" and s instanceof Class
or
result = "Function" and s instanceof Function
}
from Scope s
where needs_docstring(s) and not exists(s.getDocString())
select s, scope_type(s) + " " + s.getName() + " does not have a docstring."