✨ Summary

This PR enhances type safety across Locust's wait time utilities by introducing explicit type hints and resolving related issues flagged by Mypy.

🧠 What’s Included

1. Type Hint Improvements

• Added precise type annotations to functions in:

  • locust/user/wait_time.py

• Ensures better static analysis and developer experience when working with wait time utilities.

2. Circular Import Fixes

• Resolved circular import issues introduced by type hints using TYPE_CHECKING.
• Clean and safe typing without runtime side effects.

3. Internal State Tracking Fix 🛠️

• Introduced:

  self._cp_last_wait_time: float = 0

  in:

  • locust/user/task.py
  • locust/user/users.py

• This mirrors the existing pattern:

  self._cp_last_run: float = time()

• Prevents Mypy errors when using constant_pacing and similar wait strategies.

4. Functional Improvement in constant_pacing

• Fully typed internal function:

  def wait_time_func(self: "User") -> float:

• Explicit tracking of:

  • _cp_last_run
  • _cp_last_wait_time

🧪 Validation

✅ All tests passed
✅ All checks passed
🔗 Workflow