Description
Checks
- I added a descriptive title to this issue
- I have searched (google, github) for similar issues and couldn't find anything
- I have read and followed the docs and still think this is a bug
Bug
When using the latest alpha release with mypy==0.930 I get the following error:
https://mypy.readthedocs.io/en/stable/common_issues.html#using-a-development-mypy-build
Please report a bug at https://github.com/python/mypy/issues
version: 0.930
Traceback (most recent call last):
File "mypy/semanal.py", line 5132, in accept
File "mypy/nodes.py", line 1005, in accept
File "mypy/semanal.py", line 1105, in visit_class_def
File "mypy/semanal.py", line 1184, in analyze_class
File "mypy/semanal.py", line 1193, in analyze_class_body_common
File "mypy/semanal.py", line 1253, in apply_class_plugin_hooks
File "pydantic/mypy.py", line 114, in pydantic.mypy.PydanticPlugin._pydantic_model_class_maker_callback
File "pydantic/mypy.py", line 200, in pydantic.mypy.PydanticModelTransformer.transform
File "pydantic/mypy.py", line 341, in pydantic.mypy.PydanticModelTransformer.add_initializer
File "pydantic/mypy.py", line 657, in pydantic.mypy.add_method
File "mypy/semanal.py", line 4538, in named_type
File "mypy/semanal.py", line 4505, in lookup_fully_qualified
AssertionError:
/Users/paul/.cache/pre-commit/repo4nch0291/py_env-python3.9/lib/python3.9/site-packages/pydantic/env_settings.py:21: : note: use --pdb to drop into pdb
The behavior of named_type changed in python/mypy#11332 which causes the issue. Calls to named_type in the plugin should use builtins.X instead of __builtins__.X for the fullname arg.
Output of python -c "import pydantic.utils; print(pydantic.utils.version_info())":
pydantic version: 1.9.0a2
pydantic compiled: True
install path: /Users/paul/.cache/pre-commit/repo4nch0291/py_env-python3.9/lib/python3.9/site-packages/pydantic
python version: 3.9.6 (default, Aug 18 2021, 18:03:48) [Clang 11.0.3 (clang-1103.0.32.62)]
platform: macOS-10.16-x86_64-i386-64bit
optional deps. installed: ['typing-extensions']