docs: def any2utf8(text, errors='strict', encoding='utf8'):
      """Convert a string (unicode or bytestring in `encoding`), to bytestring in utf8."""
      if isinstance(text, unicode):
          return text.encode('utf8')
      # do bytestring -> unicode -> utf8 full circle, to ensure valid utf8
      return unicode(text, encoding, errors=errors).encode('utf8')