def __rsub__(self, other): ''' >>> 1 - this # doctest: +ELLIPSIS <expression '1 - this' ...> ''' from xotl.ql.expressions import sub return sub(other, self)
def __sub__(self, other): ''' >>> this - 1 # doctest: +ELLIPSIS <expression 'this - 1' ...> ''' from xotl.ql.expressions import sub return sub(self, other)