Write the content of the string in the output I/O buffer
          This routine handle the I18N transcoding from internal
          UTF-8 The buffer is lossless, i.e. will store in case of
           partial or delayed writes.

def writeString(self, str):
        """Write the content of the string in the output I/O buffer
          This routine handle the I18N transcoding from internal
          UTF-8 The buffer is lossless, i.e. will store in case of
           partial or delayed writes. """
        ret = libxml2mod.xmlOutputBufferWriteString(self._o, str)
        return ret