Tiny python script for downloading pdf file through web site link

pdfDownloader.py

from bs4 import BeautifulSoup
import urllib.request
import requests
import os

with urllib.request.urlopen('Your URL') as response:
   html_doc = response.read()

def download_file(url):
    local_filename = url.split('/')[-1]
    r = requests.get(url, stream=True)
    with open(local_filename, 'wb') as f:
        for chunk in r.iter_content(chunk_size=1024): 
            if chunk:
                f.write(chunk)
    return local_filename

base_url = 'Your URL'
soup = BeautifulSoup(html_doc, 'html.parser')

list = []

for html in soup.find_all('a'):
     length = len(html.get('href'))
     if html.get('href')[length-3:length].lower() == "pdf":
     	list.append(base_url + html.get('href'))

for link in list:
	print(link)
	download_file(link)