[CASSANDRA-16534] bin/cqlsh writes unwanted output to stderr while validating python version if python 2.6 is installed as system python

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Duplicate
• Fix Version/s: 4.0-rc1, 4.0
• Component/s: Tool/cqlsh
• Change Category: Operability
• Complexity: Low Hanging Fruit
• Platform: All
• Assignee: Jon Meredith
• Reporter: Jon Meredith

Authors

Jon Meredith

• Created: 24/Mar/21 17:48
• Updated: 31/Jul/21 21:35
• Resolved: 24/Mar/21 17:54

Description

The cqlsh.py script requires Python >= 2.7 on Cassandra 4.0 and checks to make sure it’s a supported version, looking for alternate python versions if the default is 2.6. Unfortunately the check writes output to stderr that may confuse some users/tools consuming it.

python -c 'import os; print('\''{}.{}'\''.format(os.sys.version_info.major, os.sys.version_info.minor))'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: 'tuple' object has no attribute 'major'

The output adds no value and can be suppressed by redirecting to /dev/null

Issue Links

• is duplicated by: CASSANDRA-16414 Remove Claim of Support for Python2 in 4.0