cant download file from link python requests module code example

Example: download pdf from url python

import urllib.request
pdf_path = ""
def download_file(download_url, filename):
    response = urllib.request.urlopen(download_url)    
    file = open(filename + ".pdf", 'wb')
    file.write(response.read())
    file.close()
 
download_file(pdf_path, "Test")