refactor: Weekly code improvement (2026-04-10)

[dex-botas]

🤖 Dex Code Automation

Original Task:

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# Task
Title: Weekly code improvement (2026-04-10)
Description:
Find ONE easy-to-implement improvement in this codebase. Focus on one of these categories:
1. Consistency - naming conventions, code patterns
2. Simplification - reduce complexity, remove duplication
3. Typing - stricter TypeScript types, remove 'any'
4. Rule Compliance - find code that violates .cursor/rules or .coderabbit.yaml guidelines and fix it (e.g., API calls not using established patterns like composables with TanStack Query, missing error handling patterns, incorrect file organization)

Requirements:
- Must be low-risk and self-contained
- Should be a small, focused change (single file or few related files)
- Should not require architectural changes
- If fixing an inconsistency that appears in many places, limit to maximum 10 instances per PR (not all 40+ occurrences need to be fixed at once)
- When changes would lower unit test coverage, add additional test(s) to maintain or improve coverage levels

# Instructions
Implement this task based on the description.
If a Figma design context section is provided, treat it as implementation requirements and align the UI/UX and behavior to it.
Extract actionable details from the design context (components, states, spacing/typography/colors, interactions) and map them to concrete code changes.
Use probable target files/components from the design context when available, and satisfy listed acceptance criteria.
Keep scope limited to the requested change and design context; do not infer unrelated redesign work.
Always follow codebase rules defined in .cursor/rules directory.
It's critical that you don't over-engineer, stay within the scope of the task. Don't modify unrelated files if not in the scope of the task.
Before implementing, check if there are similar existing solutions.
After implementing, make sure that tests and lints are passing.
Only run the lint for the changed files, not the entire codebase.
Branch creation, committing with signed commits and pushing to remote is handled by the environment, you don't need to worry about that

Triggered by: weekly-automation
Run ID: 24232941063

🤖 Change Summary

Changed filter_plugins/custom.py: (1) removed deprecated six library import, replaced string_types with builtin str since Ansible requires Python 3; (2) replaced mutable default arguments (lists/dicts) with None to avoid shared-state antipattern; (3) changed not x in to idiomatic x not in per PEP 8. All functions tested and behavior-preserving.

Changes Made

1 file(s) modified

• filter_plugins/custom.py