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Add shunts for Beam typehints to apache_beam.dataframe.schemas #22680

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Merged
TheNeuralBit merged 1 commit into from
Aug 11, 2022
Merged

Add shunts for Beam typehints to apache_beam.dataframe.schemas #22680

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7 changes: 7 additions & 0 deletions sdks/python/apache_beam/dataframe/schemas.py
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,7 @@
from apache_beam.typehints.schemas import named_fields_to_schema
from apache_beam.typehints.schemas import named_tuple_from_schema
from apache_beam.typehints.schemas import named_tuple_to_schema
from apache_beam.typehints.typehints import normalize
from apache_beam.utils import proto_utils

__all__ = (
Expand Down Expand Up @@ -119,6 +120,12 @@

BEAM_TO_PANDAS[bytes] = 'bytes'

# Add shunts for normalized (Beam) typehints as well
BEAM_TO_PANDAS.update({
normalize(typehint): pandas_dtype
for (typehint, pandas_dtype) in BEAM_TO_PANDAS.items()
})


@typehints.with_input_types(T)
@typehints.with_output_types(pd.DataFrame)
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7 changes: 7 additions & 0 deletions sdks/python/apache_beam/dataframe/schemas_test.py
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Expand Up @@ -180,6 +180,13 @@ def test_generate_proxy(self):

pd.testing.assert_frame_equal(schemas.generate_proxy(Animal), expected)

def test_generate_proxy_beam_typehint(self):
expected = pd.Series(dtype=pd.Int32Dtype())

actual = schemas.generate_proxy(typehints.Optional[np.int32])

pd.testing.assert_series_equal(actual, expected)

def test_nice_types_proxy_roundtrip(self):
roundtripped = schemas.generate_proxy(
schemas.element_type_from_dataframe(NICE_TYPES_PROXY))
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