Error in Base Usage

[aarctb]

@plizonczyk firts of all, congrats for your code.

I ran the pytest and it is ok, but I got the sample in the main page (socket client and server in python) and the server crash when I connect with the client and I getting the bellow error in server side:

noise.exceptions.NoiseValidationError: Keypair s has to be set for chosen handshake pattern

I used Noise_IK_25519_AESGCM_SHA256 and others.

[aarctb]

I made a new test and now works fine.

Thanks.