[ARROW-2568] [Python] Expose thread pool size setting to Python, and deprecate "nthreads"

• Type: Improvement
• 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/18930
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 10/May/18 17:14
• Updated: 11/Jan/23 07:21
• Resolved: 25/May/18 01:37

Description

Now that we have a global thread pool, we should:

• use it in places where we currently require an explicit number of threads (with an additional use_threads argument to enable parallelism)
• deprecate the now pointless nthreads argument
• expose the thread pool capacity setting in Python

Issue Links

• links to: GitHub Pull Request #2078