Method _copy

pydantic/fields.py:816–833

Return a copy of the `FieldInfo` instance.

(self)

        }

    def _copy(self) -> Self:
        """Return a copy of the `FieldInfo` instance."""
        # Note: we can't define a custom `__copy__()`, as `FieldInfo` is being subclassed
        # by some third-party libraries with extra attributes defined (and as `FieldInfo`
        # is slotted, we can't make a copy of the `__dict__`).
        if type(self) is FieldInfo:
            # Fast-path if the instance isn't a subclass (`copy.copy()` relies on pickling which is slower):
            copied = FieldInfo.__new__(FieldInfo)
            for attr_name in FieldInfo.__slots__:
                setattr(copied, attr_name, getattr(self, attr_name))
        else:
            copied = copy(self)

        for attr_name in ('metadata', '_attributes_set', '_qualifiers'):
            # Apply "deep-copy" behavior on collections attributes:
            setattr(copied, attr_name, getattr(copied, attr_name).copy())

        return copied  # pyright: ignore[reportReturnType]

    def __repr_args__(self) -> ReprArgs:
        yield 'annotation', _repr.PlainRepr(_repr.display_as_type(self.annotation))