3.7.3 is an old release of an old version.  It has already been patched a few times.  If you cannot upgrade to at least the last bugfix release of 3.7, you are somewhat on your own.

The word 'Killed' in not in the ssl module, so I presume it comes from the LibreSSL, which on your system is what is imported as _ssl.  On Win 10, 'import ssl' prints nothing (normal for most imports) and ssl.SSLContext returns an instance of class SSLContext.

You question would be better asked on a help forum, such as python-list or stackoverflow.