A simple port scanner. Written in Python.

Ports.py

import argparse
import socket

parser = argparse.ArgumentParser(description='Query a host address of all ports, returns open or closed.')
parser.add_argument('-u', type=str, help='The host address (e.g.) example.com')

args = vars(parser.parse_args())

host = args['u'] 


for port in range(20, 1025):
    s = socket.socket()
    s.settimeout(.1) #Low as possible to still get a correct resp.

    try:
        s.connect((host, port)) #Try to connect.
    except Exception:
        s.close()
        print 'Port [%d] is closed.' % (port)
        continue #Do nothing!
    else:
        s.close()
        print 'Port [%d] is open.' % (port) #Print the port works!