[CASSANDRA-17433] Revise use of pytz in Python >= 3.9

• Type: Task
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 5.0-alpha1, 5.0
• Component/s: CQL/Interpreter
• Change Category: Code Clarity
• Complexity: Low Hanging Fruit
• Platform: All

Source Control Link

https://github.com/apache/cassandra/commit/a2dc44f0725b02294071e67d0cab57a7629f25a1

Test and Documentation Plan

Test locally using python version >= 3.9, updated and ran 'test_timestamp_output' test from 'test_cqlsh_output.py'

• Assignee: Leonard Ma
• Reporter: Brad Schoening

Authors

Leonard Ma

Reviewers

Brad Schoening, Brandon Williams, Stefan Miklosovic

• Created: 14/Mar/22 15:36
• Updated: 12/Sep/23 13:02
• Resolved: 05/Jun/23 19:21

Description

PEP 615 – Support for the IANA Time Zone Database in the Standard Library class ZoneInfo

PEP 615 (Python 3.9) has obsoleted the 3rd party Olsen tz library 'pytz' with support for the IANA Time Zone Database.  The code which imports this in cqlshmain.py and tests in test_cqlsh_output.py should be updated accordingly.

This can be done with something like:

if sys.version_info >= (3,9):

    try:

        import zoneinfo

else:

    try:

        import pytz

        ...

Issue Links

• links to: GitHub Pull Request #2378