So, we’ve got a switch statement with slightly different syntax ... right out of the feature proposal to add the keyword in question to Python: I find an efficiency hit a small price to pay ...

Why is your Python app so slow? Find out by using Python’s built-in profiler to locate bottlenecks in your Python code Python may ... the entire app to a single statement or expression.

Mypy, Pytype, Pyright, and Pyre can help you keep your type-hinted Python code bug-free. Let’s see what each of these useful tools has to offer. In the beginning, Python had no type decorations.