curl -o test.txt (ссылка на сайт)
import subprocess
curl = subprocess.Popen( ["curl", "-o", "test.txt", "https://toster.ru", "-A", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36"], stdout=subprocess.PIPE ).communicate()