SPV client TCP connection in python

I’m trying to implement an SPV client in python (for my own learning). I want to start by making a simple TCP connection with a full node, but I can’t either get a response to my version message, or to my verack message if the version message goes through. I’ve referred to this and here’s the code I’m trying to run:

#Import dependencies
import socket
import time
import random
import struct
import hashlib
import binascii
import ssl
import socks

# Binary encode the sub-version
def create_sub_version():
    sub_version = "/Satoshi:0.7.2/"
    return b'x0F' + sub_version.encode()

# Binary encode the network addresses
def create_network_address(ip_address, port):
    network_address = struct.pack('>8s16sH', b'x01', 
        bytearray.fromhex("00000000000000000000ffff") + socket.inet_aton(ip_address), port)

# Create the TCP request object
def create_message(magic, command, payload):
    checksum = hashlib.sha256(hashlib.sha256(payload).digest()).digest()[0:4]
    return(struct.pack('L12sL4s', magic, command.encode(), len(payload), checksum) + payload)

# Create the "version" request payload
def create_payload_version(peer_ip_address):
    version = 60002
    services = 1
    timestamp = int(time.time())
    addr_local = create_network_address("", 8333)
    addr_peer = create_network_address(peer_ip_address, 8333)
    nonce = random.getrandbits(64)
    start_height = 645953
    payload = struct.pack('

I contacted the server in the code are among the only ones who would respond to a message version, returning b'7b226a736f6e727063223a2022322e30222c20226572726f72223a207b22636f6465223a202d33323730302c20226d657373616765223a20226d65737361676573206d75737420626520656e636f64656420696e205554462d38227d2c20226964223a206e756c6c7d0a '.

I also tried to reference: this pile swap issue and Ken Shirriff's github code, but none of them seem to work, either because I'm using python3 or from other instances. I'm a beginner in this, so if someone could help me understand why I can't convey my messages in the code above or have another implementation in python3, I'd be grateful.