Use Python 3.6.4 to download image and create folder by book id

Url

There are 4 jpg files in one book id.

There are 749 - 826 book id

The last urls are

I try use two "for loops and while loops" to get all url , but always failure.

# -*- coding: UTF-8 -*-

base_url = "http://url.com/"

page = "/page-"

jpg = ".jpg"


for bookid in range(749,827):
    url = base_url + str(bookid) + page
    for n in range(1,5):
        u = url + str(n) + jpg
        print (u)

The logic is that I wanna get 1 book id and 1-4 jpg, then create a folder by book id. Move 1-4 pages to folder one by one.

Solution

import urllib
import os 
book_ids = list(range(749 ,827))
page_ids = ["page-1.jpg","page-2.jpg","page-3.jpg","page-4.jpg"]
all_url = []
base_url ="http://url.com/"

for book_id in book_ids:
    books =[]
    for page_id in page_ids:
       books.append(base_url+str(book_id)+"/"+str(page_id))
    all_url.append({book_id:books})
for data in all_url:
   directory ="new/"+str(data.keys()[0])
   if not os.path.exists(directory):
     os.makedirs(directory)
   count = 0
   for urls in data.items()[0][1]:
      #print urls
      filename = page_ids[count]
      #print filename
      fullfilename = os.path.join(directory, filename)
      urllib.urlretrieve(urls, fullfilename)
      count= count+1

now you have all url with corresponding book id now it will download if there is some content hope it helps