code: def update_file_metadata(self, uri, filename=None, description=None,
                               mtime=None, privacy=None):
          
  
          resource = self.get_resource_by_uri(uri)
  
          if not isinstance(resource, File):
              raise ValueError('Expected File, got {}'.format(type(resource)))
  
          result = self.api.file_update(resource['quickkey'], filename=filename,
                                        description=description,
                                        mtime=mtime, privacy=privacy)
  
          return result
docs: Update file metadata.
  
          uri -- MediaFire file URI
  
          Supplying the following keyword arguments would change the
          metadata on the server side:
  
          filename -- rename file
          description -- set file description string
          mtime -- set file modification time
          privacy -- set file privacy - 'private' or 'public'