Push the content of the arry in the input buffer This
          routine handle the I18N transcoding to internal UTF-8 This
          is used when operating the parser in progressive (push)
           mode.

def push(self, len, buf):
        """Push the content of the arry in the input buffer This
          routine handle the I18N transcoding to internal UTF-8 This
          is used when operating the parser in progressive (push)
           mode. """
        ret = libxml2mod.xmlParserInputBufferPush(self._o, len, buf)
        return ret