python从socket升级为secure socket

建立一个基本的socket，然后再升级为secure socket进行https通信，例子代码：

import socket
import ssl

hostname = 'www.baidu.com'
context = ssl.create_default_context()

with socket.create_connection((hostname, 443)) as sock:
    with context.wrap_socket(sock, server_hostname=hostname) as ssock:
        print(ssock.version())
        ssock.write(b'GET / HTTP/1.1\r\nHost: www.baidu.com\r\n\r\n')
        res = ssock.read()
        print(res)