Implement __iter__ in Python RepeatedScalarContainer

[erik-hasse]

What language does this apply to?
Python

Describe the problem you are trying to solve.
The __iter__ attribute is commonly used to check whether an object is list-like, so neglecting to include it can cause issues, for example this bug in pandas: pandas-dev/pandas#42549. This results in weird behavior where list(obj) works fine even though hasattr(obj, '__iter__') is False.

Describe the solution you'd like
The Python RepeatedScalarContainer should implement tp_iter in addition to tp_as_sequence.

Describe alternatives you've considered
Manually convert to a list every time we use RepeatedScalarContainer (list(obj)).

[barshaul]

@zhangskz Are there any updates on this?

[caneff]

Ping on this.

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[caneff]

This is still a problem, and internally at Google we still have to patch Pandas in order to make it work with proto repeated fields. Any updates as to fixing this?

[github-actions]

We triage inactive PRs and issues in order to make it easier to find active work. If this issue should remain active or becomes active again, please add a comment.

This issue is labeled inactive because the last activity was over 90 days ago.

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This issue was closed and archived because there has been no new activity in the 14 days since the inactive label was added.