Find available ports using python script from command line.

find_ports.py

import socket
import sys

def find_available_ports(start_port, end_port):
    available_ports = []
    for port in range(start_port, end_port+1):
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            # Set a timeout for trying to bind to a port
            s.settimeout(1)
            try:
                s.bind(("0.0.0.0", port))
                available_ports.append(port)
            except socket.error:
                pass
 
    return available_ports

if __name__ == "__main__":
    from_port = int(sys.argv[1])
    to_port = int(sys.argv[2])
    print(find_available_ports(from_port, to_port))

# How to use 
# python3 find_ports.py 1000 1050