[BEAM-12717] datetime.date not working with Distinct()

• Type: Bug
• Status: Open
• Priority: P3
• Resolution: Unresolved
• Affects Version/s: 2.31.0
• Component/s: sdk-py-core
• Labels: types
• Assignee: Unassigned
• Reporter: Sebastian Kretzig
• Created: 03/Aug/21 18:31
• Updated: 04/Jun/22 20:56

Description

I was using 2.28.0 and running a standard Distinct on a PColl of datetime.dates without problems.

After upgrading to 2.31.0, I'm getting this error:

TypeError: Unable to deterministically encode '2020-12-02' of type '<class 'datetime.date'>', please provide a type hint for the input of 'Get the unique dates from prices/Group/GroupByKey' [while running 'Get the unique dates from prices/ToPairs']

Had convert the date to str and back to date after running the Distinct() to preserve the date type. Any clues?