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How to use optional_derived_out method in pandera

Best Python code snippet using pandera_python

test_decorators.py

Source:test_decorators.py

...472        assert exc.data.equals(df)473def test_check_types_optional_out() -> None:474    """Test the check_types behaviour when the output schema is Optional."""475    @check_types476    def optional_derived_out(477        df: DataFrame[InSchema],  # pylint: disable=unused-argument478    ) -> typing.Optional[DataFrame[DerivedOutSchema]]:479        return None480    df = pd.DataFrame({"a": [1]}, index=["1"])481    assert optional_derived_out(df) is None482    @check_types483    def optional_out(484        df: DataFrame[InSchema],  # pylint: disable=unused-argument485    ) -> typing.Optional[DataFrame[OutSchema]]:486        return None487    df = pd.DataFrame({"a": [1]}, index=["1"])488    assert optional_out(df) is None489def test_check_types_optional_in() -> None:490    """Test the check_types behaviour when the input schema is Optional."""491    @check_types492    def optional_in(493        # pylint: disable=unused-argument494        df: typing.Optional[DataFrame[InSchema]],495    ) -> None:...

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