Method stls

Lib/poplib.py:457–462

The method unconditionally raises an exception since the STLS command doesn't make any sense on an already established SSL/TLS session.

(self, context=None)

            return sock

        def stls(self, context=None):
            """The method unconditionally raises an exception since the
            STLS command doesn't make any sense on an already established
            SSL/TLS session.
            """
            raise error_proto('-ERR TLS session already established')

    __all__.append("POP3_SSL")