Florian Bruhin <python....@the-compiler.org> added the comment:
Ah, I wasn't aware of that, thanks for the pointer! So what inspect does
internally is:
def _get_type_hints(func, **kwargs):
try:
return typing.get_type_hints(func, **kwargs)
except Exception:
# First, try to use the get_type_hints to resolve
# annotations. But for keeping the behavior intact
# if there was a problem with that (like the namespace
# can't resolve some annotation) continue to use
# string annotations
return func.__annotations__
Which means there's even some "prior art" there already falling back to a
string when the annotation couldn't be resolved. Doing so in
typing.get_type_hints on a per-argument basis would thus also make inspect more
consistent:
Right now,
print(repr(inspect.signature(fun).parameters['b'].annotation))
in my example returns a string, but when changing the annotation for `a`, the
returned annotation for `b` is now magically a `typing.Union` object.
(I personally would indeed expect inspect to resolve those annotations, but
yeah, let's keep that in issue43355.)
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue43463>
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