python port scanner

1import socket, argparse, sys
2
3def Main(ip, port):
4    print('-' * 120)
5    print(f'Scanning target: {args.ip}')
6    print(f'Checking port: {args.port}')
7    print('-' * 120)
8
9    try:
10        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
11        s.settimeout(0.5)
12        result = s.connect_ex((args.ip, args.port))
13        if result == 0:
14            print(f'Open Port: {args.port}')
15        else:
16            print(f'Port: {args.port} closed')
17        s.close()
18    except KeyboardInterrupt:
19        print('\nExiting program.')
20        sys.exit()
21    except socket.gaierror:
22        print('Hostname could not be resolved.')
23        sys.exit()
24    except socket.timeout:
25        print('Connection timed out.')
26        sys.exit()
27    except socket.error:
28        print("Couldn't connect to server.")
29        sys.exit()
30
31if __name__ == "__main__":
32    parser = argparse.ArgumentParser(description='Scan a port on given hostname or ip')
33    ap = argparse.ArgumentParser(prog='port_scanner.py', usage='%(prog)s [options] -ip "ip or hostname" -port "port to scan"')
34    ap.add_argument('-ip', required=True, type=str, help='ip or hostname')
35    ap.add_argument('-port', required=True, type=int, help='Port to scan')
36    args = ap.parse_args()
37    ip = args.ip
38    port = args.port
39    Main(ip, port)

1import socket 
2import threading
3
4target = "127.0.0.1"   # scan local host
5def port_scanner(port):
6    try:
7        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
8        s.connect((target, port))
9        print(f"Port {port} is open")
10    except:
11        pass
12
13
14for port in range(1,5050):
15    thread = threading.Thread(target =port_scanner, args=[port])
16    thread.start()