Karthikeyan Singaravelan <tir.kar...@gmail.com> added the comment:
I guess the method checks for annotation on cls [0] which will be
classmethod/staticmethod object in the report and won't have annotations. The
annotations should be looked up in the function the classmethod/staticmethod
decorator wraps around as in cls.__func__ . Something like below so that the
right annotations are picked up. In addition to this the registry should store
the type annotation as key to cls or cls.__func__ depending on normal method or
classmethod/staticmethod.
diff --git Lib/functools.py Lib/functools.py
index 050bec8605..a66711208d 100644
--- Lib/functools.py
+++ Lib/functools.py
@@ -1073,24 +1073,33 @@ def singledispatch(func):
if func is None:
if isinstance(cls, type):
return lambda f: register(cls, f)
- ann = getattr(cls, '__annotations__', {})
+ if isinstance(cls, (classmethod, staticmethod)):
+ ann = getattr(cls.__func__, '__annotations__', {})
+ func = cls.__func__
+ else:
+ ann = getattr(cls, '__annotations__', {})
+ func = cls
[0]
https://github.com/python/cpython/blob/ab6423fe2de0ed5f8a0dc86a9c7070229326b0f0/Lib/functools.py#L1076
----------
nosy: +levkivskyi, ncoghlan, xtreak
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39679>
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