python 域检查器，域是否启动

Question

我正在尝试检查 100 多个域是否已启动。 我使用 python，我将所有域都放在一个 csv 文件中，然后我逐行读取文件，我使用请求库来获取域的代码状态。这是剧本

import requests
import csv
import time

SLEEP = 0 # Time in seconds the script should wait between requests
url_list = []
url_statuscodes = []
url_statuscodes.append(["url","status_code"]) # set the file header for output


def getStatuscode(url):
    try:
        r = requests.head(url,verify=False,timeout=5) 
        
        return (r.status_code)

    except:
        return -1


# Url checks from file Input
# use one url per line that should be checked
with open('domainlist.csv', newline='') as f:

    reader = csv.reader(f)
    for row in reader:
        url_list.append(row[0])


# Loop over full list
for url in url_list:
    #print(url)
    check = [url,getStatuscode(url)]
    time.sleep(SLEEP)
    url_statuscodes.append(check)
    print(url_statuscodes.append(check)) #This line is my problem, I get "None" when I print statuscodes, I want to get something like 200 if the domaine is up 
    
# Save file
with open("domainstatus.csv", "w", newline="") as f:
  writer = csv.writer(f)
  writer.writerows(url_statuscodes)

我想在打印时得到

url_statuscodes.append(check)

200，这意味着域已启动。而不是 200 我在打印时得到“无”。如果域名不可用，我想得到 404 或其他类似域名已关闭的东西。

提前致谢！