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Add missing to_type_hint to WindowedValueCoder #33403

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merged 3 commits into from
Dec 17, 2024
Merged

Add missing to_type_hint to WindowedValueCoder #33403

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d077e74
Add missing to_type_hint to WindowedValueCoder
shunping Dec 17, 2024
409599d
Add type ignore to make mypy happy.
shunping Dec 17, 2024
e42feaf
Merge branch 'master' into fix-windowed-value-coder
shunping Dec 17, 2024
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3 changes: 3 additions & 0 deletions sdks/python/apache_beam/coders/coders.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1446,6 +1446,9 @@ def from_type_hint(cls, typehint, registry):
# pickle coders.
return cls(registry.get_coder(typehint.inner_type))

def to_type_hint(self):
return typehints.WindowedValue[self.wrapped_value_coder.to_type_hint()]


Coder.register_structured_urn(
common_urns.coders.WINDOWED_VALUE.urn, WindowedValueCoder)
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6 changes: 6 additions & 0 deletions sdks/python/apache_beam/coders/coders_test.py
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Expand Up @@ -258,6 +258,12 @@ def test_numpy_int(self):
_ = indata | "CombinePerKey" >> beam.CombinePerKey(sum)


class WindowedValueCoderTest(unittest.TestCase):
def test_to_type_hint(self):
coder = coders.WindowedValueCoder(coders.VarIntCoder())
self.assertEqual(coder.to_type_hint(), typehints.WindowedValue[int]) # type: ignore[misc]


if __name__ == '__main__':
logging.getLogger().setLevel(logging.INFO)
unittest.main()
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