用python编写网络扫描器

import socket

def scan_port(host, port):
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.settimeout(1)
        result = sock.connect_ex((host, port))
        if result == 0:
            print(f"Port {port} is open")
        sock.close()
    except socket.error:
        print("Error occurred while scanning")

def scan_host(host):
    try:
        ip = socket.gethostbyname(host)
        print(f"Scanning host: {host} ({ip})")
        for port in range(1, 100):
            scan_port(ip, port)
    except socket.gaierror:
        print("Hostname could not be resolved")

scan_host("example.com")