ENH: bfill for interval indexing added GH#51503 #51503

[hamedgibago]

• closes NotImplementedError: method backfill not yet implemented for IntervalIndex #51503
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.

[hamedgibago]

Test is done for backfill/bfill methods with time intervals. nearest and pad/ffill will be added in future commits.

[mroeschke]

These for loops are not going to be performant enough for this feature

[mroeschke]

Thanks for your pull request @hamedgibago. I noticed this is your first pull request into pandas, so I would recommend first tackling an issue labeled good first issue. The issue you are tackling is a bit more complex and has not been triaged by a maintainer yet

[hamedgibago]

I'll do good first issue issues. Despite this comment you mentioned and not all features added for bfill, because All checks have passed and green, will be this PR accepted?

[mroeschke]

I am dubious that that for looping solution over each element will be performant enough for this feature

[hamedgibago]

I am dubious that that for looping solution over each element will be performant enough for this feature

I've added this for type of date time check. Let me see if self._maybe_cast_listlike_indexer and self._maybe_convert_i8(t) will be removed any error happen or not.
For the second loop of comparing indexes, I'll think another way, as I mentioned in TODO comment in the code

[mroeschke]

Thanks for this pull request, but it appears there hasn't been much traction on this PR in a while so closing for how. Happy for you to tackle an issue that has been triaged or a good first issue