urlretrieve 提示ValueError: read of closed file

yakczh_cu

1. 
   
2. from urllib.request import urlretrieve
   
3. 
   
4. url = 'https://www.oschina.net/question/2529065_2232659'
   
5. filename = 'local.html'
   
6. 
   
7. urlretrieve(url,filename)
   

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提示Valuerr: read of closed file

后来发现是必须要填ua

1. 
   
2. from urllib.request import Request,urlretrieve
   
3. 
   
4. url = 'https://www.oschina.net/question/2529065_2232659'
   
5. 
   
6. filename = 'local.html'
   
7. req = Request(url,None,{'User-Agent':'Mozilla/5.0 (Windows NT 6.1; rv:38.9) Gecko/20100101 Goanna/2.0 Firefox/38'})
   
8. 
   
9. 
   
10. urlretrieve(url,filename)
    

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但是填了ua还是提示     block = fp.read(bs)
ValueError: read of closed file
用urllib.request.urlopen 读出来再写入文件是可以的,但那样比 urlretrieve(url,localfile) 要繁琐一些