Advertisement

Your Ad could be here. I want to connect my readers to relavant ads. If you have a product targeted at developers, let's talk. [email protected]

When running a python process that requires a port it's handy if there is an option for it to just run on the next avaialble port. To do this we can use the socket module to determine if the port is in use or not before starting our process.


import socket

def find_port(port=8000):
    """Find a port not in ues starting at given port"""
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        if s.connect_ex(("localhost", port)) == 0:
            return find_port(port=port + 1)
        else:
            return port