code: def file_update_file(self, quick_key, file_extension=None, filename=None,
                           description=None, mtime=None, privacy=None,
                           timezone=None):
          
          return self.request('file/update', QueryParams({
              'quick_key': quick_key,
              'file_extension': file_extension,
              'filename': filename,
              'description': description,
              'mtime': mtime,
              'privacy': privacy,
              'timezone': timezone
          }))
docs: file/update_file
  
          http://www.mediafire.com/developers/core_api/1.3/file/#update_file