No Python 2.7 support due to dependancy multidict.

[denis-trofimov]

If interested, please see comment here. I can not pass installing further now.
aio-libs/multidict#4

[webknjaz]

This package itself uses Python3.5+ syntax, like https://github.com/vmagamedov/grpclib/blob/master/grpclib/client.py#L56.

It does not make sense for to pick dependencies supporting Python 2 (which is dieing, btw) ;)

It looks like @vmagamedov should add Trove classifier declaring supported python version + python_requires setuptools argument.

[vmagamedov]

Updated README.rst and setup.py files (as @webknjaz suggested) to note that at least Python 3.5 is required for using this library.

[denis-trofimov]

Thank you, @webknjaz @vmagamedov.

It does not make sense for to pick dependencies supporting Python 2 (which is dieing, btw) ;)
@webknjaz grammar (which is dying, btw) ;)