[CASSANDRA-15572] `object of type 'NoneType' has no len()` error in cqlsh with python 3

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.0-alpha4, 4.0
• Component/s: Tool/cqlsh
• Bug Category: Code - Bug - Unclear Impact
• Severity: Low
• Complexity: Low Hanging Fruit
• Discovered By: User Report
• Platform: All
• Since Version: 4.0

Source Control Link

https://github.com/apache/cassandra/commit/d069fd235f3553ef6e3267efc9cf3b9b2fe4e70e

Test and Documentation Plan

Manual testing

• Assignee: Yuki Morishita
• Reporter: Yuki Morishita

Authors

Yuki Morishita

Reviewers

Dinesh Joshi

• Created: 16/Feb/20 22:51
• Updated: 15/May/20 08:41
• Resolved: 07/Apr/20 23:26

Description

Looks like in Python 3, webbrowser._tryorder can be NoneType and throw error like below:

Traceback (most recent call last):
  File ".\bin\cqlsh.py", line 99, in <module>
    if len(webbrowser._tryorder) == 0:
TypeError: object of type 'NoneType' has no len()