So I'm trying to get an erlang server started, which will echo back from my python client. I can see the connection is made, however the echo doesn't actually happen. Can anybody point me to the right solution?
I'm using python3 as my client driver.
Here is my erlang server: I start it with echo:accept(6000).

-module(echo).
-export([accept/1]).

%% Starts an echo server listening for incoming connections on
%% the given Port.
accept(Port) ->
    {ok, Socket} = gen_tcp:listen(Port, [binary, {active, true}, {packet, line}, {reuseaddr, true}]),
    io:format("Echo server listening on port ~p~n", [Port]),
    server_loop(Socket).

%% Accepts incoming socket connections and passes then off to a separate Handler process
server_loop(Socket) ->
    {ok, Connection} = gen_tcp:accept(Socket),
    Handler = spawn(fun () -> echo_loop(Connection) end),
    gen_tcp:controlling_process(Connection, Handler),
    io:format("New connection ~p~n", [Connection]),
    server_loop(Socket).

%% Echoes the incoming lines from the given connected client socket
echo_loop(Connection) ->
    receive
        {tcp, Connection, Data} ->
        gen_tcp:send(Connection, Data),
        echo_loop(Connection);
    {tcp_closed, Connection} ->
        io:format("Connection closed ~p~n", [Connection])
    end.

here is my python client:

import socket
import sys

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect the socket to the port where the server is listening
server_address = ('localhost', 6000)
print(sys.stderr, 'connecting to %s port %s' % server_address)
sock.connect(server_address)
try:
    
    # Send data
    message = 'This is the message.  It will be repeated.'
    convertedString = message.encode('utf-8')
    print(sys.stderr, 'sending "%s"' % message)
    sock.sendall(convertedString)

    # Look for the response
    amount_received = 0
    amount_expected = len(message)
    
    while amount_received < amount_expected:
        data = sock.recv(16).decode('utf-8')
        amount_received += len(data)
        print(sys.stderr, 'received "%s"' % data)

finally:
    print(sys.stderr, 'closing socket')
    sock.close()

I think the problem is it just hangs after sending, and now it's waiting for a response, I think I might not be receiving the string in the right way.