[ARROW-6488] [Python] pyarrow.NULL equals to itself

• 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/22857
• Assignee: Joris Van den Bossche
• Reporter: Joris Van den Bossche
• Created: 08/Sep/19 19:43
• Updated: 11/Jan/23 07:47
• Resolved: 12/Sep/19 23:06

Description

Somewhat related to ARROW-6386 on the interpretation of nulls, we currently have the following behaviour:

In [28]: pa.NULL == pa.NULL                                                                                                                                                                                        
Out[28]: True

Which I think is certainly unexpected for a null / missing value. I still need to check what the array-level compare kernel does (NULL or False? ideally NULL I think), but we should follow that.

Issue Links

• links to: GitHub Pull Request #5330