mcp-server-semgrep/semgrep-rules/python/lang/maintainability/useless-literal-set.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
  - id: useless-literal-set
    patterns:
      - pattern: |
          set(..., ($X, $A), ..., ($X, $B), ...)
      - focus-metavariable: $X
    message: "`$X` is uselessly assigned twice inside the creation of the set"
    languages: [python]
    severity: ERROR
    metadata:
      category: maintainability
      references:
        - https://docs.python.org/3/library/stdtypes.html#set-types-set-frozenset
      technology:
        - python