[jira] [Created] (ARROW-4434) [Python] Cannot create empty StructArray via pa.StructArray.from_arrays

["Krisztian Szucs (JIRA)" <ji...@apache.org>]

Krisztian Szucs created ARROW-4434:
--------------------------------------

             Summary: [Python] Cannot create empty StructArray via pa.StructArray.from_arrays
                 Key: ARROW-4434
                 URL: https://issues.apache.org/jira/browse/ARROW-4434
             Project: Apache Arrow
          Issue Type: Bug
            Reporter: Krisztian Szucs


{code:python}
In [5]: pa.StructArray.from_arrays([], names=[])
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-5-d6fa9cf39f31> in <module>
----> 1 pa.StructArray.from_arrays([], names=[])

~/Workspace/arrow/python/pyarrow/array.pxi in pyarrow.lib.StructArray.from_arrays()
   1326         num_arrays = len(arrays)
   1327         if num_arrays == 0:
-> 1328             raise ValueError("arrays list is empty")
   1329
   1330         length = len(arrays[0])

ValueError: arrays list is empty
{code}

however

{code:python}
pa.array([], type=pa.struct([]))
{code}

works



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