A set of simple demonstrations on Python ssl module. All the demos, which are in package pyssldemo.demo, just focus on TLS 1.2 and/or TLS 1.3.
Python: 3.7.3
OpenSSL: 1.1.1
Before run any demo, it has to setup environment PYSSLDEMO_CERT_DIR, which indicates the absolute path to the certificates directory. All the certificates are distributed and in folder pyssldemo/certs.