download pdf from link using python

1import urllib.request
2pdf_path = ""
3def download_file(download_url, filename):
4    response = urllib.request.urlopen(download_url)    
5    file = open(filename + ".pdf", 'wb')
6    file.write(response.read())
7    file.close()
8 
9download_file(pdf_path, "Test")