iht opened a new pull request #11731: URL: https://github.com/apache/beam/pull/11731
The two Python katas about windowing fail because the timestamps for the elements are calculated based on the local timezone, and my timezone does not match the timezone hardcoded in the tests, and because parsing from strings using `fromisoformat` was failing. In the first Kata, the timestamp was calculated from time objects, and converted to a timestamp in the local timezone. Thus, the results of the test depended on the configuration of the local timezone in the running system. The tests were hardcoded with a timezone different to mine, and thus I always failed to pass this Kata. The changes in this commit change the type in `Event` to be a `datetime`, the timestamps are set in UTC, and the output in the tests is hardcoded in UTC too. This should ensure that the kata works regardless the timezone configured in the system running the kata. In the second Kata, the code was failing with the following error: ```AttributeError: type object 'datetime.datetime' has no attribute 'fromisoformat'``` I changed the timestamps to be set using the `datetime` constructor, rather than parsing from strings using `fromisoformat`. Both katas now pass with the examples hardcoded in the corresponding tests. 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