rules:
  - id: sync-sleep-in-async-code
    patterns:
      - pattern: time.sleep(...)
      - pattern-inside: |
          async def $F(...):
            ...
      - pattern-not-inside: |
          async def $F(...):
            def $INNER(...):
              ...
    message: Synchronous time.sleep in async code will block the event loop and not allow other tasks to execute. Use asyncio.sleep() instead.
    languages: [python]
    severity: WARNING
    metadata:
      category: best-practice
      technology:
        - python