AttributeError: 'NoneType' object has no attribute 'decode'

下記の質問者さんと同じ内容のプログラムを作成しようとしています。
https://teratail.com/questions/152091

しかし、AttributeError: 'NoneType' object has no attribute 'decode'が
表示されてしまい進みません。アドバイスお願いします。

python
1import os
2import sys
3import traceback
4from mimetypes import guess_extension
5from time import time, sleep
6from urllib.request import urlopen, Request
7from urllib.parse import quote
8from bs4 import BeautifulSoup
9
10#任意のメールアドレス
11#ツールを使ってダウンロードするときのマナーみたい
12MY_EMAIL_ADDR = '@.com'
13
14class Fetcher:
15    def __init__(self, ua=''):
16        self.ua = ua
17
18    def fetch(self, url):
19        req = Request(url, headers={'User-Agent': self.ua})
20        try:
21            with urlopen(req, timeout=3) as p:
22                b_content = p.read()
23                mime = p.getheader('Content-Type')
24        except:
25            sys.stderr.write('Error in fetching {}\n'.format(url))
26            sys.stderr.write(traceback.format_exc())
27            return None, None
28        return b_content, mime
29
30fetcher = Fetcher(MY_EMAIL_ADDR)
31
32def fetch_and_save_img(num):
33    num_self = num
34    #dataというディレクトリが作られる
35    data_dir = './image/enjyeruroad/'
36    if not os.path.exists(data_dir):
37        os.makedirs(data_dir)
38
39    img_urls = img_url_list(num_self)[0]
40    num_self2 = img_url_list(num_self)[1]
41    s = num_self2 - 21
42
43    for i, img_url in enumerate(img_urls):
44        sleep(0.1)
45        img, mime = fetcher.fetch(img_url)
46        if not mime or not img:
47            continue
48        ext = guess_extension(mime.split(';')[0])
49        if ext in ('.jpe', '.jpeg'):
50            ext = '.jpg'
51        if not ext:
52            continue
53        result_file = os.path.join(data_dir, str(s) + ext)
54        with open(result_file, mode='wb') as f:
55            f.write(img)
56        s += 1
57        print('fetched', img_url)
58
59    if len(img_url) != 0:
60        fetch_and_save_img(num_self2)
61
62def img_url_list(num):
63    url = 'https://search.yahoo.co.jp/image/search?p=エンジェルロード&oq=&ei=UTF-8&xargs=2&b={}'.format(num)
64    byte_content, _ = fetcher.fetch(url)
65    soup = BeautifulSoup(byte_content.decode('UTF-8'), 'html.parser')
66    
67    img_elems = soup.select('a[target=imagewin] > img')
68    print(img_elems)
69    
70    img_urls = [e['src'] for e in img_elems]
71    print(img_urls)
72    
73    return img_urls, num + 20
74
75if __name__ == '__main__':
76    # word = sys.argv[1]
77    # fetch_and_save_img(word)
78    num = 1
79    fetch_and_save_img(num)

下記がエラーコードです。

python
1エラーコード
2runfile('/Users/nakayakenta/get_images_yahoo.py')
3Error in fetching https://search.yahoo.co.jp/image/search?p=エンジェルロード&oq=&ei=UTF-8&xargs=2&b=1
4Traceback (most recent call last):
5  File "/Users/nakayakenta/get_images_yahoo.py", line 21, in fetch
6    with urlopen(req, timeout=3) as p:
7  File "/Users/nakayakenta/anaconda3/lib/python3.7/urllib/request.py", line 222, in urlopen
8    return opener.open(url, data, timeout)
9  File "/Users/nakayakenta/anaconda3/lib/python3.7/urllib/request.py", line 525, in open
10    response = self._open(req, data)
11  File "/Users/nakayakenta/anaconda3/lib/python3.7/urllib/request.py", line 543, in _open
12    '_open', req)
13  File "/Users/nakayakenta/anaconda3/lib/python3.7/urllib/request.py", line 503, in _call_chain
14    result = func(*args)
15  File "/Users/nakayakenta/anaconda3/lib/python3.7/urllib/request.py", line 1360, in https_open
16    context=self._context, check_hostname=self._check_hostname)
17  File "/Users/nakayakenta/anaconda3/lib/python3.7/urllib/request.py", line 1317, in do_open
18    encode_chunked=req.has_header('Transfer-encoding'))
19  File "/Users/nakayakenta/anaconda3/lib/python3.7/http/client.py", line 1229, in request
20    self._send_request(method, url, body, headers, encode_chunked)
21  File "/Users/nakayakenta/anaconda3/lib/python3.7/http/client.py", line 1240, in _send_request
22    self.putrequest(method, url, **skips)
23  File "/Users/nakayakenta/anaconda3/lib/python3.7/http/client.py", line 1107, in putrequest
24    self._output(request.encode('ascii'))
25UnicodeEncodeError: 'ascii' codec can't encode characters in position 20-27: ordinal not in range(128)
26Traceback (most recent call last):
27
28  File "<ipython-input-12-d5a5d83e6f61>", line 1, in <module>
29    runfile('/Users/nakayakenta/get_images_yahoo.py')
30
31  File "/Users/nakayakenta/anaconda3/lib/python3.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 668, in runfile
32    execfile(filename, namespace)
33
34  File "/Users/nakayakenta/anaconda3/lib/python3.7/site-packages/spyder_kernels/customize/spydercustomize.py", line 108, in execfile
35    exec(compile(f.read(), filename, 'exec'), namespace)
36
37  File "/Users/nakayakenta/get_images_yahoo.py", line 79, in <module>
38    fetch_and_save_img(num)
39
40  File "/Users/nakayakenta/get_images_yahoo.py", line 39, in fetch_and_save_img
41    img_urls = img_url_list(num_self)[0]
42
43  File "/Users/nakayakenta/get_images_yahoo.py", line 65, in img_url_list
44    soup = BeautifulSoup(byte_content.decode('UTF-8'), 'html.parser')
45
46AttributeError: 'NoneType' object has no attribute 'decode'