如何使用python检索远程主机的TLS/SSL对等证书？

import socket
import ssl

def get_remote_certificate(hostname, port):
    context = ssl.create_default_context()
    with socket.create_connection((hostname, port)) as sock:
        with context.wrap_socket(sock, server_hostname=hostname) as ssock:
            certificate = ssock.getpeercert()
            return certificate

hostname = 'example.com'
port = 443
certificate = get_remote_certificate(hostname, port)
print(certificate)