NameError: name 'SchemaExtraCallable' is not defined

[pawamoy]

Bug

https://github.com/pawamoy/pytkdocs/pull/41/checks?check_run_id=747827745

             pydantic version: 1.5.1
            pydantic compiled: False
                 install path: /home/pawamoy/.cache/pypoetry/virtualenvs/pytkdocs-LMVK1zAi-py3.7/lib/python3.7/site-packages/pydantic
               python version: 3.7.5 (default, Apr 27 2020, 16:40:42)  [GCC 9.3.0]
                     platform: Linux-5.6.15-arch1-1-x86_64-with-arch
     optional deps. installed: ['typing-extensions']

>>> import typing
>>> import pydantic
>>> 
>>> class M(pydantic.BaseModel):
...     a: int
... 
>>> typing.get_type_hints(M.__config__)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/pawamoy/.basher-packages/pyenv/pyenv/versions/3.7.5/lib/python3.7/typing.py", line 976, in get_type_hints
    value = _eval_type(value, base_globals, localns)
  File "/home/pawamoy/.basher-packages/pyenv/pyenv/versions/3.7.5/lib/python3.7/typing.py", line 265, in _eval_type
    ev_args = tuple(_eval_type(a, globalns, localns) for a in t.__args__)
  File "/home/pawamoy/.basher-packages/pyenv/pyenv/versions/3.7.5/lib/python3.7/typing.py", line 265, in <genexpr>
    ev_args = tuple(_eval_type(a, globalns, localns) for a in t.__args__)
  File "/home/pawamoy/.basher-packages/pyenv/pyenv/versions/3.7.5/lib/python3.7/typing.py", line 263, in _eval_type
    return t._evaluate(globalns, localns)
  File "/home/pawamoy/.basher-packages/pyenv/pyenv/versions/3.7.5/lib/python3.7/typing.py", line 467, in _evaluate
    eval(self.__forward_code__, globalns, localns),
  File "<string>", line 1, in <module>
NameError: name 'SchemaExtraCallable' is not defined

Now you could wonder, "why are you doing this?", and you would be right to do so. Well, I'm writing a package that automatically introspect classes and all their members to output structured data in JSON (it's pytkdocs, used by mkdocstrings to bring autodoc for MkDocs, and pytkdocs tries to support Pydantic models).

I'm just reporting for the sake of it. Maybe there's an easy fix? Maybe it's a bug in Python's typing? Maybe it's expected because SchemaExtraCallable is a forward ref in this context?

Anyway, I'm catching the error for now, so it's fine if you want to close the issue 🙂

[samuelcolvin]

Thanks for reporting, @PrettyWood has kindly fixed this for you.

I'll try make a release in the next week or so that includes this.