Joey Pereira created FLINK-37912:
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Summary: Typing the DataStream interfaces
Key: FLINK-37912
URL: https://issues.apache.org/jira/browse/FLINK-37912
Project: Flink
Issue Type: Improvement
Components: API / Python
Reporter: Joey Pereira
I'm wondering if there's been any consideration about adding typing to the
DataStream class as a generic. It would be amazing to have that type
information carried through such that it's easier for users to lean on mypy to
figure out issues ahead of time.
Having started to use pyflink for the first time, I fumbled through a number of
basic errors including things as simple as assuming the wrong data type passing
through a {{DataStream}} (e.g. a tuple of k/v versus just a value).
Obviously this is no easy task provided the Java/Python interop, but if there
are creative ways this might be possible it would be great interface
improvement!
(cc [~shuyichen])
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