The contextvars and the chain of asyncio tasks in Python

In Python, the contextvars is somehow like thread local, but mostly for coroutines. But will the context itself be kept consistent in a chain of asyncio tasks? Let’s find out. contextvars Let’s have a rough review of the contextvars in Python. The contextvars module provides a way to maintain a context across a chain of function calls, natively supported with asyncio. For example import asyncio import contextvars var = contextvars.ContextVar('var', default={}) async def sub2(): print(f'in sub2, {var. Continue reading