[ARROW-10260] [Python] Missing MapType to Pandas dtype

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26256
• Assignee: Derek Marsh
• Reporter: Bryan Cutler
• Created: 09/Oct/20 23:49
• Updated: 11/Jan/23 08:12
• Resolved: 10/Oct/20 11:21

Description

The Map type conversion to Pandas done in ARROW-10151 forgot to add dtype mapping for to_pandas_dtype()

 

In [2]: d = pa.map_(pa.int64(), pa.float64())                                                                                In [3]: d.to_pandas_dtype()                                                                                                  
---------------------------------------------------------------------------
NotImplementedError                       Traceback (most recent call last)
<ipython-input-3-08beaa635a3e> in <module>
----> 1 d.to_pandas_dtype()~/miniconda2/envs/pyarrow-test/lib/python3.7/site-packages/pyarrow/types.pxi in pyarrow.lib.DataType.to_pandas_dtype()NotImplementedError: map<int64, double>

Issue Links

• is related to: ARROW-10151 [Python] Add support MapArray to_pandas conversion
• links to: GitHub Pull Request #8422