[GitHub] [arrow] jorisvandenbossche commented on issue #35704: [Python] KeyError when using compute function month_interval_between()

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

jorisvandenbossche commented on issue #35704:
URL: https://github.com/apache/arrow/issues/35704#issuecomment-1558681248

   @vcfgv thanks for opening the issue! You are running into a limitation of the pyarrow python bindings (although the error message is not very clear about what is going on ..). 
   The "month_interval_between" kernel returns an array with the interval type with the "year_month" unit. And currently, the python bindings only support the "month_day_nano" unit. 
   
   If you use the "month_day_nano_interval_between" kernel instead, you do get a result, using your example data:
   
   ```python
   >>> pc.month_day_nano_interval_between(array_0, array_1)
   <pyarrow.lib.MonthDayNanoIntervalArray object at 0x7f41b7c9b5e0>
   [
     0M0d0ns,
     0M0d0ns
   ]
   ```


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