Q75: How do debuggers and code coverage tools leverage sys.settrace()?
sys.settrace() registers a global tracing hook function invoked by CPython on every line execution, function call, return, or exception event. Forms the foundation of debuggers (pdb) and coverage tools (coverage.py).
Key Takeaways
- Registers execution tracing hook functions across interpreter events.
- Powers debuggers (
pdb), profilers, and code coverage measurement tools.
Knowledge Check
Which module in Python's standard library provides the built-in interactive command-line debugger?