代理检查python

import os
import subprocess

def check_proxy(proxy_url):
    try:
        response = requests.head(proxy_url)
        return True
    except Exception as e:
        return False

if __name__ == "__main__":
    proxy_url = "http://proxy.example.com"
    is_proxy_working = check_proxy(proxy_url)
    if is_proxy_working:
        print(f"{proxy_url} is working.")
    else:
        print(f"{proxy_url} is not working.")