Anand Inguva created BEAM-14547:
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Summary: Support type inference for Python 3.10
Key: BEAM-14547
URL: https://issues.apache.org/jira/browse/BEAM-14547
Project: Beam
Issue Type: Bug
Components: sdk-py-core
Reporter: Anand Inguva
Assignee: Anand Inguva
After debugging, the issue arises here
[https://github.com/apache/beam/blob/70cee1d125db0b62b2d660fc399e5a23845eb0e3/sdks/python/apache_beam/typehints/trivial_inference.py#L328]
The method above is not able to infer outputs properly in 3.10 and results in
an error hence returns *Any* instead of valid output_type
{code:java}
# Python <= 3.9
from apache_beam.typehints.trivial_inference import infer_return_type_func
wrapper = lambda x: [x]
output_type = infer_return_type_func(wrapper, [int])
# output_type would be List[int]
# Python == 3.10
wrapper = lambda x: [x]
output_type = infer_return_type_func(wrapper, [int])
# fails with error beam/sdks/python/apache_beam/typehints/opcodes.py", line #
322, in dict_update base = state.stack[-arg]
# IndexError: list index out of range
# this being in try except block, the except block returns Any. This is causing
typehint unittests to fail.
{code}
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