code: def __zip_file(self):
          
          if self.zip_path:
              # If using a local file, just open it:
              self.__print('Opening local zipfile: %s' % self.zip_path)
              return open(self.zip_path, 'rb')
  
          # Otherwise, download it and make a file object in-memory:
          url = self.__release_url
          self.__print('Downloading from URL: %s' % url)
          response = urlopen(url)
          return io.BytesIO(response.read())
docs: Get a file object of the FA zip file.