bingAPIを使って画像をスクレイプしたいです。

###前提・実現したいこと
bingAPIを使って画像をスクレイプしたいです。
githubで落ちていたコードをお借りしましたが、エラーが出てしまいました。

###発生している問題・エラーメッセージ
Traceback (most recent call last):
File "scrape2.py", line 71, in <module>
search_result = bing_search_api(search_query)
File "scrape2.py", line 35, in bing_search_api
search_response_json = search_response.json()
File "/Users/xxxxx/.pyenv/versions/TensorFlow/lib/python3.5/site-packages/requests/models.py", line 842, in json
self.content.decode(encoding), **kwargs
File "/Users/xxxxx/Desktop/denpa/json/init.py", line 319, in loads
return _default_decoder.decode(s)
File "/Users/xxxxx/Desktop/denpa/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/Users/xxxxx/Desktop/denpa/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

###該当のソースコード

python
1import json
2import os
3import requests
4import sys
5import urllib.request
6
7
8BING_API_KEY = 'XXXXXXXXXXXXXXXXXXXXXXXXXXX'
9BING_API_URL = 'https://api.datamarket.azure.com/Bing/Search/'
10
11
12def bing_search_api(
13        search_query = 'xxxx',
14        search_market='ja-JP',
15        search_adult='Off',
16        search_type='Image',
17        search_top=50
18):
19
20
21    search_url = \
22        BING_API_URL + search_type + \
23        '?Query=%27' + urllib.request.quote(search_query) + \
24        '%27&Market=%27' + urllib.request.quote(search_market) + \
25        '%27&Adult=%27' + urllib.request.quote(search_adult) + \
26        '%27&$top=' + str(search_top) + \
27        '&$format=json'
28
29    auth = requests.auth.HTTPBasicAuth('', BING_API_KEY)
30
31
32    search_response = requests.get(search_url, auth=auth)
33
34    search_response_json = search_response.json()
35
36    return search_response_json
37
38
39def get_image_url_list(json_data):
40
41    image_url_list = []
42    for item in json_data['d']['results']:
43        image_url_list.append(item['MediaUrl'])
44
45    return image_url_list
46
47
48def get_image(image_url_list):
49
50    counter = 0
51    total_image_numger = len(image_url_list)
52    for image_url in image_url_list:
53        progress = str(counter+1) + "/" + str(total_image_numger)
54        print ("Downloading") + image_url + " (" + progress + ")"
55        
56        image_file = requests.get(image_url)
57        
58        root, ext = os.path.splitext(image_url)
59        image_file_name = str(counter) + ext
60        
61        f = open(image_file_name, 'wb')
62        f.write(image_file.content)
63        f.close()
64        counter += 1
65
66
67if __name__ == '__main__':
68    args = sys.argv
69    search_query = " ".join(args[1:])
70    search_result = bing_search_api(search_query)
71    image_url_list = get_image_url_list(search_result)
72
73    get_image(image_url_list)
74    print ("Done.")