问从zip归档中提取文件，不包括某些文件名

EN

def extractall(self, path=None, members=None, pwd=None):
    """Extract all members from the archive to the current working
       directory. `path' specifies a different directory to extract to.
       `members' is optional and must be a subset of the list returned
       by namelist().
    """
    if members is None:
        members = self.namelist()

    for zipinfo in members:
        self.extract(zipinfo, path, pwd)

import zipfile


def unzip_file(zippedfile = '', targetdir = '', exclude_ext = ''):

    if zippedfile == '': ## this is the .zip file
        return
    if targetdir == '':
        targetdir = os.path.join(os.path.dirname(zippedfile), os.path.basename(zippedfile)[:-4])    
    if not os.path.exists (targetdir):
        os.makedirs (targetdir)

    zfile = zipfile.ZipFile(zippedfile)

    for name in zfile.namelist():
        (dirName, fileName) = os.path.split(name)
        if not dirName == '':
            if not os.path.exists (os.path.join(targetdir, dirName)):
                os.makedirs (os.path.join(targetdir, dirName))
        if fileName == '':
            # directory
            newDir = os.path.join(targetdir, dirName)
            if not os.path.exists(newDir):
                os.makedirs (newDir)
        else:
            # file
            if exclude_ext == '':
                print ('Extracting File : ' + name)
                fd = open(os.path.join(targetdir, name), 'wb')
                fd.write(zfile.read(name))
                fd.close()
            else:
                if not exclude_ext == name[-3:]:
                    print ('Extracting File : ' + name)
                    fd = open(os.path.join(targetdir, name), 'wb')
                    fd.write(zfile.read(name))
                    fd.close()                    
                else:
                    print ('File with extension ' + exclude_ext + ' is excluded')
    zfile.close()

    return