evented.py

#!/usr/bin/env python3
# vim: set sw=4 ts=4:

import eventlet
eventlet.monkey_patch()

import socket
import _thread

def main():
    addr = ('', 54321)
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.bind(addr)
    s.listen(1)
    while True:
        conn, addr = s.accept()
        _thread.start_new_thread(handle_conn, (conn, addr))

def handle_conn(conn, addr):
    print('Connected by', addr)
    while True:
        data = conn.recv(1024)
        if not data:
            break
        conn.sendall(data)
    conn.close()

if __name__ == '__main__':
    main()

threaded.py

#!/usr/bin/env python3
# vim: set sw=4 ts=4:

import socket
import _thread

def main():
    addr = ('', 54321)
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.bind(addr)
    s.listen(1)
    while True:
        conn, addr = s.accept()
        _thread.start_new_thread(handle_conn, (conn, addr))

def handle_conn(conn, addr):
    print('Connected by', addr)
    while True:
        data = conn.recv(1024)
        if not data:
            break
        conn.sendall(data)
    conn.close()

if __name__ == '__main__':
    main()