Set Up a Simple Server in Python

Question

I have recently starting learning network programming with python. Here is a simple server I tried to write:

import socket

def server():
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.bind(('127.0.0.1', 1024))
    while True:
        data, address = sock.recvfrom(65535)
        text = data.decode('ascii')
        print('the client from {0} sent: "{1}"'.format(address, text))
        if text is '0': break

I wanted the server to wait till it is getting packets from the server, but when I run it, it will close instantly. what did I do wrong?

aside from not calling server() the conditional if text is '0' will never come true, see stackoverflow.com/questions/1504717/… — Tadhg McDonald-Jensen
– Tadhg McDonald-Jensen, Commented Jun 2, 2016 at 19:41
Check out the youtube video titled David Beazley - Python Concurrency From the Ground Up for a crash course on writing a server in Python. — martineau
– martineau, Commented Jun 2, 2016 at 19:50

Steven Mercatante · Accepted Answer · 2016-06-02 19:38:49Z

3

You're not actually calling server().

Add this after the function definition:

if __name__ == '__main__':
  server()

answered Jun 2, 2016 at 19:38

Steven Mercatante

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1 Comment

Julien Palard Over a year ago

@BarK You may check this Answer as answering your question so we all stop spending time reviewing it over and over ? ;-) No need to be ashamed BTW you're learning, we're all still learning, even 20 years later.

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