Strings, numbers (integers and floats alike), tuples, and built-in singleton objects (True, False, and None) are all common types to use as keys. A given key is unique to a given dictionary.

Run coroutines and tasks in Python Naturally, the most common use for asyncio is to run the asynchronous parts of your Python script. This means learning to work with coroutines and tasks.

It’s not entirely new… If we write: In Python 3.9 — it works. That is because the new parser enabled this syntax, despite it not being officially supported until Python 3.10. More typing ...