Python 3 TCP float (double) adder

tcp-server.py

import socket
import sys

""" based on https://pymotw.com/3/socket/tcp.html
modified by Adrian Jost"""

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

# Bind the socket to the port
server_address = ('127.0.0.1', 1111)
print('starting up on {} port {}'.format(*server_address))
sock.bind(server_address)

# Listen for one incoming connections
sock.listen(1)

def parse(data):
    try:
        items = data.decode().split(";")
        return str(float(items[0]) + float(items[1]))
    except:
        return False

# Wait for a connection
print('waiting for a connection')
connection, client_address = sock.accept()
try:
    print('connection from', client_address)
    while True:
        # Receive the data and try to calculate
        data = connection.recv(1024)
        print('received {!r}'.format(data))
        if data:
            if(parse(data)):
                print('sending data back to the client', parse(data))
                connection.sendall(parse(data).encode())
        else:
            print('no data from', client_address)
            break
finally:
    # Clean up the connection
    connection.close()

It was just a simple homework. You won't find clean code or detailed explenations here. I definetly recommend google here ;)

test it with this code

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 = ('127.0.0.1', 1111)
print('connecting to {} port {}'.format(*server_address))
sock.connect(server_address)

try:

    # Send data
    message = b'12;13;'
    print('sending {!r}'.format(message))
    sock.sendall(message)

    data = sock.recv(16)
    print('received {!r}'.format(data))

finally:
    print('closing socket')
    sock.close()