Create `__iter__()` for `DatetimeIndex`

[Dr-Irv]

I also ran in to this using date_range.

Workaround is good for now:

for ts in cast(Iterator[datetime], date_range(start='1/1/2023', end='1/08/2023', freq='6H', tz=timezone.utc)):
   ....

Originally posted by @davetapley in #502 (comment)

Should create DatetimeIndex.__iter__() returning Timestamp

[twoertwein]

Is there a reason that IndexOpsMixin is not generic (except for it taking quite some work)? Pandas seems to define __iter__ on IndexOpsMixin. I have locally a branch that tries to make IndexOpsMixin generic. If I get it to work, I will open a PR.

edit: https://github.com/twoertwein/pandas-stubs/tree/iter_interpolate

[Dr-Irv]

Is there a reason that IndexOpsMixin is not generic (except for it taking quite some work)?

Historical artifact of how the stubs were created. I hope you can get this to work!

[twoertwein]

I created #760 - still needs some time to be ready but it is getting there. Feel free to skim it to see if something could clearly be better :)