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Patch asyncio to allow nested event loops

Project description



By design asyncio does not allow its event loop to be nested. This presents a practical problem: When in an environment were the event loop is already running it’s impossible to run tasks and wait for the result. Trying to do so will give the error “RuntimeError: This event loop is already running”.

The issue pops up in various environments, such as web servers, GUI applications and in Jupyter notebooks.

This package will patch asyncio to allow nested use of and loop.run_until_complete.


pip3 install nest_asyncio

Python 3.5 or higher is required.


import nest_asyncio

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