Python urllib下載一個在線目錄的內容

Question

我想製作一個程序，將打開一個目錄，然後使用正則表達式來獲取powerpoint的名稱，然後在本地創建文件並複製其內容。當我運行它時，它似乎工作，但是當我真的嘗試打開文件時，他們一直說版本是錯誤的。

from urllib.request import urlopen 
import re 

urlpath = urlopen('http://www.divms.uiowa.edu/~jni/courses/ProgrammignInCobol/presentation/') 
string = urlpath.read().decode('utf-8') 

pattern = re.compile('ch[0-9]*.ppt') #the pattern actually creates duplicates in the list 

filelist = pattern.findall(string) 
print(filelist) 

for filename in filelist: 
    remotefile = urlopen('http://www.divms.uiowa.edu/~jni/courses/ProgrammignInCobol/presentation/' + filename) 
    localfile = open(filename,'wb') 
    localfile.write(remotefile.read()) 
    localfile.close() 
    remotefile.close() 

Answer 1

此代碼適用於我。我只是稍微修改了一下，因爲你的每個ppt文件都是複製的。

from urllib2 import urlopen 
import re 

urlpath =urlopen('http://www.divms.uiowa.edu/~jni/courses/ProgrammignInCobol/presentation/') 
string = urlpath.read().decode('utf-8') 

pattern = re.compile('ch[0-9]*.ppt"') #the pattern actually creates duplicates in the list 

filelist = pattern.findall(string) 
print(filelist) 

for filename in filelist: 
    filename=filename[:-1] 
    remotefile = urlopen('http://www.divms.uiowa.edu/~jni/courses/ProgrammignInCobol/presentation/' + filename) 
    localfile = open(filename,'wb') 
    localfile.write(remotefile.read()) 
    localfile.close() 
    remotefile.close()