[ARROW-6369] [Python] Support list-of-boolean in Array.to_pandas conversion

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/22743
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 27/Aug/19 15:45
• Updated: 11/Jan/23 07:46
• Resolved: 06/Sep/19 10:53

Description

See

In [4]: paste                                                                                                                                                                                  
a = pa.array(np.array([[True, False], [True, True, True]]))

## -- End pasted text --

In [5]: a                                                                                                                                                                                      
Out[5]: 
<pyarrow.lib.ListArray object at 0x7fc187d3fa40>
[
  [
    true,
    false
  ],
  [
    true,
    true,
    true
  ]
]

In [6]: a.to_pandas()                                                                                                                                                                          
---------------------------------------------------------------------------
ArrowNotImplementedError                  Traceback (most recent call last)
<ipython-input-6-08d835d60bd1> in <module>
----> 1 a.to_pandas()

~/code/arrow/python/pyarrow/array.pxi in pyarrow.lib._PandasConvertible.to_pandas()
    439             deduplicate_objects=deduplicate_objects)
    440 
--> 441         return self._to_pandas(options, categories=categories,
    442                                ignore_metadata=ignore_metadata)
    443 

~/code/arrow/python/pyarrow/array.pxi in pyarrow.lib.Array._to_pandas()
    815 
    816         with nogil:
--> 817             check_status(ConvertArrayToPandas(c_options, self.sp_array,
    818                                               self, &out))
    819         return wrap_array_output(out)

~/code/arrow/python/pyarrow/error.pxi in pyarrow.lib.check_status()
     84             raise ArrowKeyError(message)
     85         elif status.IsNotImplemented():
---> 86             raise ArrowNotImplementedError(message)
     87         elif status.IsTypeError():
     88             raise ArrowTypeError(message)

ArrowNotImplementedError: Not implemented type for lists: bool
In ../src/arrow/python/arrow_to_pandas.cc, line 1910, code: VisitTypeInline(*data_->type(), this)

as reported in https://github.com/apache/arrow/issues/5203

Issue Links

• links to: GitHub Pull Request #5301