How to handshake with a peer on a BitTorrent network?

Question

Python

Here is my code:

import socket
import time

sock = socket.socket()
sock.connect((peer_id, peer_port))

message = b'\x13BitTorrent protocol\x00\x00\x00\x00\x00\x00\x00\x00' + bytes('1A6948C96FA8302C74DA680C7360D1486A52B2F9'.lower(), encoding="UTF8") + b'66788486352714431784'

sock.send(message)

print('s')

while True:
    try:
        resp = sock.recv(len(message))
        print(resp)
        if resp != b'':
            break
    except:
        pass

In response from the peer, I get an empty string b''. And this line is constantly printed in the console
What's the problem?