Class PydanticUndefinedAnnotation

pydantic/errors.py:105–131

A subclass of `NameError` raised when handling undefined annotations during `CoreSchema` generation. Attributes: name: Name of the error. message: Description of the error.

class PydanticUndefinedAnnotation(PydanticErrorMixin, NameError):
    """A subclass of `NameError` raised when handling undefined annotations during `CoreSchema` generation.

    Attributes:
        name: Name of the error.
        message: Description of the error.
    """

    def __init__(self, name: str, message: str) -> None:
        self.name = name
        super().__init__(message=message, code='undefined-annotation')

    @classmethod
    def from_name_error(cls, name_error: NameError) -> Self:
        """Convert a `NameError` to a `PydanticUndefinedAnnotation` error.

        Args:
            name_error: `NameError` to be converted.

        Returns:
            Converted `PydanticUndefinedAnnotation` error.
        """
        try:
            name = name_error.name  # type: ignore  # python > 3.10
        except AttributeError:
            name = re.search(r".*'(.+?)'", str(name_error)).group(1)  # type: ignore[union-attr]
        return cls(name=name, message=str(name_error))


class PydanticImportError(PydanticErrorMixin, ImportError):