[ARROW-3557] [Python] Set language_level in Cython sources

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/19871
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 18/Oct/18 18:02
• Updated: 11/Jan/23 07:28
• Resolved: 23/Oct/18 10:28

Description

Cython 0.29.0 emits the following warning:

C:\Miniconda36-x64\envs\arrow\lib\site-packages\Cython\Compiler\Main.py:367: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: C:\projects\arrow\python\pyarrow\_parquet.pxd

We should probably try to switch it to Python 3.

Issue Links

• links to: GitHub Pull Request #2814