报错name 'url' is not defined，眼睛都看花了

辉晖飛

1. import urllib.request
   
2. import os
   
3. import re
   
4. 
   
5. def url_open():
   
6.     req = urllib.request.Request(url)
   
7.     req.add_header('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3013.3 Safari/537.36')
   
8.     response = urllib.request.urlopen(url)
   
9.     html = response.read()
   
10. 
    
11.     return html
    
12.    
    
13. def get_page(url):
    
14.     html = url_open().decode('utf-8')
    
15. 
    
16.     p = r'current-comment-page">\[(\d{1,})\]'
    
17.     cp = re.findall(p, html)
    
18.     s = ''.join(cp)
    
19. 
    
20.     return s
    
21. 
    
22. def find_imgs(url):
    
23.     html = url_open().decode('utf-8')
    
24. 
    
25.     p=r'<img src="//(.+\.jpg)'
    
26.     img_addrs = re.findall(p, html)
    
27. 
    
28.     for each in img_addrs:
    
29.         print(each)
    
30.     return img_addrs
    
31.             
    
32. 
    
33. def save_imgs(folder, img_addrs):
    
34.     p=r'/(.+\.jpg)'
    
35.     for each in img_addrs:
    
36.         filename = re.findall(p,each)
    
37.         #filename = each.split('/')[-1]
    
38.         with open(filename, 'wb') as f:
    
39.             img = url_open(each)
    
40.             f.write(img)
    
41. 
    
42. def download_pic(folder='img', pages=10):
    
43. #    os.mkdir(folder)
    
44.     os.chdir(folder)
    
45. 
    
46.     url = "http://jandan.net/pic/"
    
47.     page_num = int(get_page(url))
    
48. 
    
49.     for i in range(pages):
    
50.         page_num -= i
    
51.         page_url = url + 'page-' + str(page_num) + '#comments'
    
52.         img_addrs = find_imgs(page_url)
    
53.         save_imgs(folder, img_addres)
    
54. 
    
55. if __name__ == '__main__':
    
56.     download_pic()
    

复制代码

Traceback (most recent call last):
  File "E:\workspace\py\download_pic.py", line 74, in <module>
    download_pic()
  File "E:\workspace\py\download_pic.py", line 65, in download_pic
    page_num = int(get_page(url))
  File "E:\workspace\py\download_pic.py", line 14, in get_page
    html = url_open().decode('utf-8')
  File "E:\workspace\py\download_pic.py", line 6, in url_open
    req = urllib.request.Request(url)
NameError: name 'url' is not defined

眼花花不知道在哪里写错，，正则也用的怪怪的

SixPy

def url_open(url):

五行缺五行

url_open函数怎么没有参数呢？

辉晖飛

就是加了报错，才去掉的
Traceback (most recent call last):
  File "E:\workspace\py\download_pic.py", line 79, in <module>
    download_pic()
  File "E:\workspace\py\download_pic.py", line 70, in download_pic
    page_num = int(get_page(url))
  File "E:\workspace\py\download_pic.py", line 15, in get_page
    html = url_open().decode('utf-8')
TypeError: url_open() missing 1 required positional argument: 'url'