[issue27989] incomplete signature with help function using typing

[Ivan Levkivskyi]

Ivan Levkivskyi added the comment:

Here is the patch according to the discussion (modifying inspect).

I didn't change the rendering of docs for classes (neither stripped 'typing.' nor changed __bases__ to __orig_bases__). First, collections.abc.X are widely used as base classes, so that plain Mapping could be confused with collections.abc.Mapping. Second, seeing the actual runtime type-erased bases suggests that one should use isinstance() and issubclass() with those (not with, e.g.,  Mapping[int, str], the latter will raise TypeError).

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keywords: +patch
nosy: +yselivanov
Added file: http://bugs.python.org/file45188/typing-pydoc.diff

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