code: def _wc_hard_wrap(line, length):
      
      chars = []
      chars_len = 0
      for char in line:
          char_len = wcwidth(char)
          if chars_len + char_len > length:
              yield "".join(chars)
              chars = []
              chars_len = 0
  
          chars.append(char)
          chars_len += char_len
  
      if chars:
          yield "".join(chars)
docs: Wrap text to length characters, breaking when target length is reached,
      taking into account character width.
  
      Used to wrap lines which cannot be wrapped on whitespace.