code: def warn_message(self, message, fh=None, prefix="[warn]:", suffix="..."):
          
  
          msg = prefix + message + suffix
          fh = fh or sys.stdout
  
          if fh is sys.stdout:
              termcolor.cprint(msg, color="yellow")
          else:
              fh.write(msg)
  
          pass
docs: print warn type message,
          if file handle is `sys.stdout`, print color message
  
  
          :param str message: message to print
          :param file fh: file handle,default is `sys.stdout`
          :param str prefix: message prefix,default is `[warn]`
          :param str suffix: message suffix ,default is `...`
          :return: None