获取icann根镜像数量

import yaml  # pip ibstall pyyaml
import requests
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

def download(url):
    proxies = { "http": None, "https": None}
    yml_res = requests.get(url,verify=False,proxies=proxies)
    return yml_res.text

def parse_yml(yml_file):
        try:
            content = yaml.safe_load(yml_file)
        except Exception  as e:
            content = "error"
        return content
    
if __name__ == "__main__":
    url_index = ["a","b","c","d","e","f","g","h","i","j","k","l","m"]
    # base_url = "https://root-servers.org/archives/2021-12-31/{}-root.yml"  # 1219
    # base_url = "https://root-servers.org/archives/2022-04-05/{}-root.yml"  # 
    base_url = "https://root-servers.org/root/{}/yaml/"  # 
    s = 0
    for i in url_index:
        res = download(base_url.format(i.upper()))
        p = parse_yml(res)
        if p=="error":
            print("stop: {}".format(base_url.format(i)))
        sites = p["Sites"]
        print(len(sites))
        s += len(sites)
    print(s)