Pydantic 1.8.2 tests fail in Fedora due to mypy incompatibility

[susilehtola]

I'm trying to update the Fedora package of Pydantic to version 1.8.2.

Unfortunately, the tests fail because of

running build_ext
mypy (unittest.loader._FailedTest) ... ERROR
======================================================================
ERROR: mypy (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: mypy
Traceback (most recent call last):
  File "/usr/lib/python3.10/unittest/loader.py", line 154, in loadTestsFromName
    module = __import__(module_name)
  File "/builddir/build/BUILD/pydantic-1.8.2/pydantic/mypy.py", line 41, in <module>
    from mypy.types import (
ImportError: cannot import name 'TypeVarDef' from 'mypy.types' (/usr/lib/python3.10/site-packages/mypy/types.py)
----------------------------------------------------------------------
Ran 1 test in 0.000s
FAILED (errors=1)

This is quite odd, since mypy is the newest version

DEBUG util.py:446:   python3-mypy                  noarch     0.921-1.fc36          build     2.5 M

Is there a version of pydantic which is compatible with mypy 0.921?

[bbugyi200]

See the comments left on PR:pydantic#3175. tl;dr; Looks like we are going to have to wait for v1.9.0 of pydantic to drop.

With that said, replacing mypy in my project's requirements.txt file with the following line is an acceptable workaround for now:

mypy != 0.920, != 0.921, != 0.930  # workaround for https://github.com/samuelcolvin/pydantic/pull/3175

[christianbundy]

Yep, this is a know bug in 1.8.2.

Options:

• Pin mypy==0.910
• Use pydantic@master (warning: has bugs)
• Wait for Pydantic 1.9.0