from pathlib import Path
import requests
filename = Path('myfile.pdf')
headers = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36'}
url = 'http://example.com/myfile.pdf'
response = requests.get(url, headers=headers)
filename.write_bytes(response.content)