python - urllib 下载在线目录的内容

Question

我正在尝试制作一个可以打开目录的程序，然后使用正则表达式获取 powerpoint 的名称，然后在本地创建文件并复制其内容。当我运行它时，它似乎可以工作，但是当我实际尝试打开文件时，他们一直说版本错误。

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

这段代码对我有用。我只是对其进行了一些修改，因为您正在复制每个 ppt 文件。

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()