code: def text_if_str(to_type, text_or_primitive):
      
      if isinstance(text_or_primitive, str):
          (primitive, text) = (None, text_or_primitive)
      else:
          (primitive, text) = (text_or_primitive, None)
      return to_type(primitive, text=text)
docs: Convert to a type, assuming that strings can be only unicode text (not a hexstr)
  
      @param to_type is a function that takes the arguments (primitive, hexstr=hexstr, text=text),
          eg~ to_bytes, to_text, to_hex, to_int, etc
      @param hexstr_or_primitive in bytes, str, or int.