[ARROW-2342] [Python] Aware timestamp type fails pickling

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.10.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18291
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 22/Mar/18 15:06
• Updated: 11/Jan/23 07:20
• Resolved: 22/Mar/18 20:58

Description

>>> ty = pa.timestamp('ms')
>>> pickle.loads(pickle.dumps(ty))
TimestampType(timestamp[ms])
>>> ty = pa.timestamp('ms', tz='UTC')
>>> pickle.loads(pickle.dumps(ty))
Traceback (most recent call last):
  File "<ipython-input-15-889e5adab733>", line 1, in <module>
    pickle.loads(pickle.dumps(ty))
  File "types.pxi", line 82, in pyarrow.lib.DataType.__setstate__
  File "types.pxi", line 1246, in pyarrow.lib.type_for_alias
ValueError: No type alias for timestamp[ms, tz=utc]

Issue Links

• links to: GitHub Pull Request #1780