I made a new version of wssh that supports TLS SNI. You'll have to install python3.6+, be careful you should not mess with your system installation of python, install python3.6 for the USER ONLY not as root if it is not already your system python version.
I had to do this upgrade because one of the servers would no longer connect, and instead would give me this error:
results in : [Errno 1] _ssl.c:510: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure
It was solved by modifying some flags and options within both wssh and ws4py so that it can handle python3 lib support for TLS SNI. It was a PITA, so thankfully you don't have to do it now!
Here's my updated fork, wssh3:
https://github.com/Tectract/wssh3