asyncio deprecated '@asyncio.coroutine' in python 3.11

[dasunprem]

Hi, I have installed the RethinkDB python driver using pip install rethinkdb and its working perfectly well. But when I connecting with asyncio using r.set_loop_type('asyncio'), it throws an error module 'asyncio' has no attribute 'coroutine'. My python version is 3.11

To Reproduce Steps to reproduce the behavior: I installed with pip install rethinkdb and the installed version in 2.4.9

System info

• OS: [OpenSUSE Tumbleweed]
• RethinkDB Version: [e.g. 2.4.9]

Additional context As a personal experiment I remove all the @asyncio.coroutine and added async in front of the reletive def and replaced yeild from to await on the file rethinkdb/asyncio_net/net_asyncio.py

As the coroutine bug is possibly fixed by the above changes I get a new error as follows

  File "/home/phenom-02/.local/share/virtualenvs/PhenomAuth2-s29yQfHp/lib/python3.11/site-packages/rethinkdb/ast.py", line 154, in run
    return c._start(self, **global_optargs)
           ^^^^^^^^
AttributeError: 'coroutine' object has no attribute '_start'```

[srh]

The cause is that generator-based coroutines with @asyncio.coroutine have been removed in 3.11.

https://docs.python.org/3.10/library/asyncio-task.html#generator-based-coroutines

async def was added in Python 3.5. It looks like Ubuntu 16.04 even has Python 3.5, so I think we don't really need to worry about compatibility.

https://launchpad.net/ubuntu/xenial/+package/python3

[srh]

As the coroutine bug is possibly fixed by the above changes I get a new error as follows

Could that be a bug in your own code? _start is supposed to be called on a connection, so maybe you need an await in your code. (I'm not familiar with Python async at all, so I'm shooting in the dark.)

[srh]

This is fixed by #298. Currently Python 3.11 is known to work on the master branch with respect to this issue. Follow #301 for a versioned release.