Mypy with pydantic

[andree0]

Crash Report

Mypy 1.4.1 not working with pydantic plugin, but 1.3.0 version working.

/home/andrzej/.pyenv/versions/3.11.4/envs/KRZ-3/lib/python3.11/site-packages/pydantic/env_settings.py:22: error: INTERNAL ERROR -- Please try using mypy master on GitHub:
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: 1.4.1
Traceback (most recent call last):
File "mypy/semanal.py", line 6451, in accept
File "mypy/nodes.py", line 1139, in accept
File "mypy/semanal.py", line 1582, in visit_class_def
File "mypy/semanal.py", line 1667, in analyze_class
File "mypy/semanal.py", line 1694, in analyze_class_body_common
File "mypy/semanal.py", line 1777, in apply_class_plugin_hooks
File "pydantic/mypy.py", line 129, in pydantic.mypy.PydanticPlugin._pydantic_model_class_maker_callback
File "pydantic/mypy.py", line 262, in pydantic.mypy.PydanticModelTransformer.transform
File "pydantic/mypy.py", line 441, in pydantic.mypy.PydanticModelTransformer.add_construct_method
TypeError: init() missing required argument 'default' (pos 6)
/home/andrzej/.pyenv/versions/3.11.4/envs/KRZ-3/lib/python3.11/site-packages/pydantic/env_settings.py:22: : note: use --pdb to drop into pdb

To Reproduce

• Create environment with python 3.11.4. You can use pyenv https://github.com/pyenv/pyenv#automatic-installer
• Install pydantic and mypy pip install pydantic mypy
• Add pyproject.toml file with config for mypy.
• Run mypy mypy .

Your Environment

• Mypy version used: 1.4.1
• Mypy command-line flags: . or --install-types .
• Mypy configuration options from pyproject.toml:

[tool.mypy]
    python_version = "3.11"
    ignore_missing_imports = true
    strict_optional = false
    show_traceback = true
    pretty = true
    plugins = [
        "pydantic.mypy",
    ]
    exclude = [
        "lib",
        "venv", # gitlab ci
        ".venv",
    ]
[tool.pydantic-mypy]
    init_forbid_extra = true
    init_typed = true
    warn_required_dynamic_aliases = true

• Python version used: 3.11.4
• Operating system and version:

No LSB modules are available.
Distributor ID: Pop
Description:    Pop!_OS 22.04 LTS
Release:        22.04
Codename:       jammy

[JelleZijlstra]

This is a bug in the mypy plugin that pydantic ships. I believe it was already fixed; you need to upgrade pydantic.

[AlexWaygood]

(Duplicate of #15485, #15492 and #15573)

[andree0]

works with pydantic 1.10.11, I run with 1.10.1 before