It’s fun to enhance by reviewing OOP in Python again: concepts are class, method, instance/object, class method, instance method, attributes

Python can do monkey patching, meaning dynamically pass attribute or method to a class or instance/object. for example

Note attaching attributes is common and feasible in Python, and attaching methods, even if it’s also feasible, is more delicate and not recommended to do without a deep understanding of Python’s underlying mechanisms.
AsyncIO, how to use async, await and asyncio module, note this is a built-in module.

Now with async the syntax be modified as


if not use batch you can also write

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