[I] span_range returns unexpected result (missing days) when using frame month [arrow]

["Iwerzhon (via GitHub)" <gi...@apache.org>]

Iwerzhon opened a new issue, #43778:
URL: https://github.com/apache/arrow/issues/43778

   ### Describe the bug, including details regarding any error messages, version, and platform.
   
   Sometimes (based on the start_date/end_date value), some days are missing when splitting a range of dates using `span_range` with `frame=month`
   
   Doc: https://arrow.readthedocs.io/en/latest/api-guide.html#arrow.arrow.Arrow.span_range
   
   Reproduction
   ```
   import arrow
   start_date = arrow.get("2023-01-31T00:00:00+02:00")
   end_date = arrow.get("2024-08-20T16:08:09.538605+02:00")
   [
       [start.isoformat(), end.isoformat()]
       for start, end in arrow.Arrow.span_range("month", start_date.datetime, end_date.datetime, exact=True)
   ]
   ```
   
   We go from `2023-03-27T23:59:59` to `2023-03-31T00:00:00+02:00`, missing 3 days (2nd to 3rd value)
   We go from `2024-07-29T23:59:59` to `2024-07-31T00:00:00+02:00`, missing 1 day (last value)
   
   Note : 
   - this issue may not occur with different dates
   - this issue does not occur when using `frame=months` instead of `frame=month`
   - this issue does not occur when not specifying `exact=True
   
   I am unsure of the difference between `month` and `months`, but I don't think this is the expected behavior?
   
   ### Component(s)
   
   Python


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Re: [I] span_range returns unexpected result (missing days) when using frame month [arrow]

["Iwerzhon (via GitHub)" <gi...@apache.org>]

Iwerzhon closed issue #43778: span_range returns unexpected result (missing days) when using frame month
URL: https://github.com/apache/arrow/issues/43778


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Re: [I] span_range returns unexpected result (missing days) when using frame month [arrow]

["buaazhwb (via GitHub)" <gi...@apache.org>]

buaazhwb commented on issue #43778:
URL: https://github.com/apache/arrow/issues/43778#issuecomment-2308710578

   You report the issue to a wrong repo. 
   The repo you use is https://github.com/arrow-py/arrow


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