Check if URLs are alive, in specific interval

urlcheck.py

import time
import requests

with open("urldata", "r") as f:
    data = f.read().split("\n")
interval = int(data[0])
url_list = [x for x in data[1:] if x]

maxlen = max(map(len, url_list))

count = 1

print(f"Interval: {interval}")
print("URLs on the list:")
print("\n".join(url_list))

while True:
    print(f"\nConnection {count}")
    for url in url_list:
        r = requests.get(url, headers={"User-Agent": "Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:86.0) Gecko/20100101 Firefox/86.0"})
        if r.status_code == 200:
            print(f"{url} IS NOW ALIVE!")
            exit()
        else:
            print(f"{url}{' ' * (maxlen - len(url))} : {r.status_code}")
    time.sleep(interval)
    count += 1

urldata file stores the interval(in seconds) between requests and urls to check.
it formats like this:

60
https://url-to-check.com/
https://another-url-to-check.org/