def _get_agg_axis(self, axis_num):
if axis_num == <NUM_LIT:0>:<EOL><INDENT>return self.columns<EOL><DEDENT>elif axis_num == <NUM_LIT:1>:<EOL><INDENT>return self.index<EOL><DEDENT>else:<EOL><INDENT>raise ValueError('<STR_LIT>' % axis_num)<EOL><DEDENT>
Let's be explicit about this.