Remove type coercion of FinalizeWrite in iobase.py
#33614
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`_finalize_write`'s output type is `TimestampedValue`, not `str`, so when `runtime_type_check` is set to `True` in `TypeOptions`, it would raise a `SimpleTypeHintError` with the following details: `apache_beam.typehints.decorators.TypeCheckError: According to type-hint expected output should be of type <class 'str'>. Instead, received '<apache_beam.transforms.window.TimestampedValue object at 0x7a303057cd10>', an instance of type <class 'apache_beam.transforms.window.TimestampedValue'>`
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_finalize_write's output type isTimestampedValue, notstr, so whenruntime_type_checkis set toTrueinTypeOptions, it would raise aSimpleTypeHintErrorwith the following details:apache_beam.typehints.decorators.TypeCheckError: According to type-hint expected output should be of type <class 'str'>. Instead, received '<apache_beam.transforms.window.TimestampedValue object at 0x7a303057cd10>', an instance of type <class 'apache_beam.transforms.window.TimestampedValue'>Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:
addresses #123), if applicable. This will automatically add a link to the pull request in the issue. If you would like the issue to automatically close on merging the pull request, commentfixes #<ISSUE NUMBER>instead.CHANGES.mdwith noteworthy changes.See the Contributor Guide for more tips on how to make review process smoother.
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