image_url = soup.select（ '。イメージa'）[0] ['href'] IndexError：リストのインデックスが範囲外になっています

Question

URLが終了しないときにこのコードの一部を使用してimgurからイメージを取得しました。 .png/.jpgのような画像の拡張子。しかし、私はこれらのエラーを取得しています。見ていると修正を提案してください：

https://github.com/asweigart/imgur-hosted-reddit-posted-downloader/blob/master/imgur-hosted-reddit-posted-downloader.py

import datetime 
import praw 
import re 
import urllib 
import requests 
from bs4 import BeautifulSoup 

sub = 'dog' 
imgurUrlPattern = re.compile(r'(http://i.imgur.com/(.*))(\?.*)?') 
r = praw.Reddit(user_agent = "download all images from a subreddit", 
       user_site = "lamiastella") 
already_done = [] 
#checkWords = ['i.imgur.com', 'jpg', 'png',] 
check_words = ['jpg', 'png'] 

subreddit = r.get_subreddit(sub) 
for submission in subreddit.get_hot(limit=10000): 
     is_image = any(string in submission.url for string in check_words) 
     print '[LOG] Getting url: ' + submission.url 
     if submission.id not in already_done and is_image: 
      if submission.url.endswith('/'): 
       modified_url = submission.url[:len(submission.url)-1] 
       try: 
         urllib.urlretrieve(modified_url, '/home/jalal/computer_vision/image_retrieval/images/' + datetime.datetime.now().strftime('%y-%m-%d-%s') + modified_url[-4:]) 
       except IOError: 
         pass 
      else: 
       try: 
         urllib.urlretrieve(submission.url, '/home/jalal/computer_vision/image_retrieval/images/' + datetime.datetime.now().strftime('%y-%m-%d-%s') + submission.url[-4:]) 
       except IOError: 
         pass 

      already_done.append(submission.id) 
      print '[LOG] Done Getting ' + submission.url 
      print('{0}: {1}'.format('submission id is', submission.id)) 
     elif 'http://imgur.com/' in submission.url: 
       # This is an Imgur page with a single image. 
       html_source = requests.get(submission.url).text # download the image's page 
       soup = BeautifulSoup(html_source, "lxml") 
       image_url = soup.select('.image a')[0]['href'] 
       if image_url.startswith('//'): 
         # if no schema is supplied in the url, prepend 'http:' to it 
         image_url = 'http:' + image_url 
         image_id = image_url[image_url.rfind('/') + 1:image_url.rfind('.')] 
         urllib.urlretrieve(image_url, '/home/jalal/computer_vision/image_retrieval/images/' + datetime.datetime.now().strftime('%y-%m-%d-%s') + image_url[-4:]) 

エラーは次のとおりです。

[LOG] Getting url: http://imgur.com/a/yOLjm 
Traceback (most recent call last): 
    File "download_images.py", line 43, in <module> 
    image_url = soup.select('.image a')[0]['href'] 
IndexError: list index out of range 

Answer 1

あなたは間違った選択をしている - あなたはsoup.select('img')[0]['src']

import datetime 
import urllib 
import requests 
from bs4 import BeautifulSoup 

url = 'http://imgur.com/gyUWtWP' 

html_source = requests.get(url).text 
soup = BeautifulSoup(html_source, "lxml") 

image_url = soup.select('img')[0]['src'] 

if image_url.startswith('//'): 
    image_url = 'http:' + image_url 
    image_id = image_url[image_url.rfind('/') + 1:image_url.rfind('.')] 

    urllib.urlretrieve(image_url, datetime.datetime.now().strftime('%y-%m-%d-%s') + image_url[-4:])