[jira] [Created] (ARROW-4111) [Python] Create time types from Python sequences of integers

["Wes McKinney (JIRA)" <ji...@apache.org>]

Wes McKinney created ARROW-4111:
-----------------------------------

             Summary: [Python] Create time types from Python sequences of integers
                 Key: ARROW-4111
                 URL: https://issues.apache.org/jira/browse/ARROW-4111
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Python
            Reporter: Wes McKinney
             Fix For: 0.13.0


This works for dates, but not times:

{code}
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> traceback >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

    def test_to_pandas_deduplicate_date_time():
        nunique = 100
        repeats = 10
    
        unique_values = list(range(nunique))
    
        cases = [
            # array type, to_pandas options
            ('date32', {'date_as_object': True}),
            ('date64', {'date_as_object': True}),
            ('time32[ms]', {}),
            ('time64[us]', {})
        ]
    
        for array_type, pandas_options in cases:
>           arr = pa.array(unique_values * repeats, type=array_type)

pyarrow/tests/test_convert_pandas.py:2392: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
pyarrow/array.pxi:175: in pyarrow.lib.array
    return _sequence_to_array(obj, mask, size, type, pool, from_pandas)
pyarrow/array.pxi:36: in pyarrow.lib._sequence_to_array
    check_status(ConvertPySequence(sequence, mask, options, &out))
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

>   raise ArrowInvalid(message)
E   pyarrow.lib.ArrowInvalid: ../src/arrow/python/python_to_arrow.cc:1012 : ../src/arrow/python/iterators.h:70 : Could not convert 0 with type int: converting to time32
{code}



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