test.py

import socket
import sys
import argparse

def main():
    parser = argparse.ArgumentParser(description="Send to the Crackme")
    parser.add_argument('--key', dest="key", default="0xa2", help="The value to be sent")
    args = parser.parse_args()
    my_key = int(args.key, 16) % 255
    print '[+] Checking the key: ' + hex(my_key)
    key =  chr(my_key) + '012'
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect(('127.0.0.1', 2222))
        s.send(key)
        result = s.recv(512)
        if result is not None:
            print "[+] Response: " + result
        s.close()
    except socket.error:
        print "Could not connect to the socket. Is the crackme running?"
    
if __name__ == "__main__":
    sys.exit(main())