code: def query_log_filename(self, idx):
          
          if not isinstance(idx, baseinteger):
              raise TypeError("idx can only be an instance of type baseinteger")
          filename = self._call("queryLogFilename",
                       in_p=[idx])
          return filename
docs: Queries for the VM log file name of an given index. Returns an empty
          string if a log file with that index doesn't exists.
  
          in idx of type int
              Which log file name to query. 0=current log file.
  
          return filename of type str
              On return the full path to the log file or an empty string on error.