Pydantic Validators show up as unused functions.

[travischambers]

It seems that all pydantic validators show up as false positives.

Given a module like this query.py

from pydantic import BaseModel, field_validator

class Query(BaseModel):

    limit: int | None = None  # number of rows to output

    @field_validator("limit", mode="before")
    @classmethod
    def limit_must_be_int_or_none(cls, item: int | None) -> int | None:
        """Validate limit."""
        match item:
            case None | int():
                return item
            case _:
                return None

Uncalled will flag the limit_must_be_int_or_none. I assume this is because my code doesn't call it. However, pydantic does call it whenever my Query gets instantiated. It is very much not dead code.

$ uncalled --how both query.py
query.py: Unused function limit_must_be_int_or_none

[elazarg]

Thanks for reporting! This is an instance of the general issue with frameworks, with the twist that it's a decorator. It might be nontrivial to fix in the regex mode. The AST mode will need a dedicated filter.