python中ssl认证是什么？

class SSLSocket(socket):

    """This class implements a subtype of socket.socket that wraps

    the underlying OS socket in an SSL context when necessary, and

    provides read and write methods over that channel."""

    def __init__(self, sock=None, keyfile=None, certfile=None,

                 server_side=False, cert_reqs=CERT_NONE,

                 ssl_version=PROTOCOL_TLS, ca_certs=None,

                 do_handshake_on_connect=True,

                 family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None,

                 suppress_ragged_eofs=True, npn_protocols=None, ciphers=None,

                 server_hostname=None,

                 _context=None):