How to get syncify / asyncify syntactic sugar for python

Question

It seems there is a general need in some use cases that async and non async code according to https://peps.python.org/pep-0492/ in python should be able to work together in a straightforward way.

It should be possible:

1. To call an async function from a synchronous context
2. To call a synchronous function from an asynchronous context

without having to bother about the complex infrastructure problems involved and the design decisions that have been made by the inventors of the async/await functionality in python which call for such complexities.

see e.g.

• Call async function from sync function, while the synchronous function continues : Python
• Why do most asyncio examples use loop.run_until_complete()?
• https://www.joeltok.com/posts/2021-02-python-async-sync/
• https://bbc.github.io/cloudfit-public-docs/asyncio/asyncio-part-5.html

Hiding the complexity of the answers with some "syntactic sugar" is what i am looking for.

There is e.g.

• A) https://github.com/ccorcos/syncify/blob/master/syncify/syncify.py since 2014 - but that project has no stars as of 2022-12.

• B) See also https://gist.github.com/phizaz/20c36c6734878c6ec053245a477572ec for a gist proposing a similar approach.

• C) https://www.aeracode.org/2018/02/19/python-async-simplified/ which points to https://github.com/django/asgiref/blob/main/asgiref/sync.py

• D) there is https://asyncer.tiangolo.com/ which has almost a thousand stars.

I tried

A

whith python 3.10 and got the error message:

  def async(*args):
        ^^^^^
SyntaxError: invalid syntax
CRITICAL: Exiting due to uncaught exception <class 'SyntaxError'>

the gist B)

with:

scite_entry=force_sync(doi_obj.asScite)()

and got the error message:

RuntimeError: This event loop is already running

which leads to the question:

• RuntimeError: This event loop is already running in python

so it's not useable as a general syntactic sugar hiding the complex details - you have to know in which context you are running your code.

asgiref C) and get the error message:

RuntimeError: You cannot use AsyncToSync in the same thread as an async event loop - just await the async function directly.

so it's again not useable as a general syntactic sugar hiding the complex details - you have to know in which context you are running your code.

the tiangolo library D)

with a single line:

scite_entry=syncify(doi_obj.asScite)()

and got the error message:

RuntimeError: This function can only be run from an AnyIO worker thread

so it's not generally useable.

What would be a general approach that hides the involved complex infrastructure problems and might make it into a PEP in the future?