def open( self, **kwargs ):
        """Append an opening tag."""

        if self.parent.twotags in self.tag or self.tag in self.parent.onetags:
            self.render( self.tag, False, None, kwargs )
        elif self.mode == 'strict_html' and self.tag in self.parent.deptags:
            raise DeprecationError( self.tag )
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/tablib-0.10.0/tablib/packages/markup3.py/element.open/swapped operands of `in`