89     def diff_diff(self, other):  argument
91         old = other.x if other else 0
100     def ratio(self, other):  argument
102         old = other.x if other else 0
116     def __add__(self, other):  argument
117         return self.__class__(self.x + other.x)
119     def __sub__(self, other):  argument
120         return self.__class__(self.x - other.x)
122     def __mul__(self, other):  argument
123         return self.__class__(self.x * other.x)
197     def diff_diff(self, other):  argument
199         old_a, old_b = other if other else (Int(0), Int(0))
204     def ratio(self, other):  argument
206         old_a, old_b = other if other else (Int(0), Int(0))
211     def __add__(self, other):  argument
212         return self.__class__(self.a + other.a, self.b + other.b)
214     def __sub__(self, other):  argument
215         return self.__class__(self.a - other.a, self.b - other.b)
217     def __mul__(self, other):  argument
218         return self.__class__(self.a * other.a, self.b + other.b)
220     def __lt__(self, other):  argument
222         other_t = other.a.x/other.b.x if other.b.x else 1.0
223         return (self_t, self.a.x) < (other_t, other.a.x)
225     def __gt__(self, other):  argument
226         return self.__class__.__lt__(other, self)
228     def __le__(self, other):  argument
229         return not self.__gt__(other)
231     def __ge__(self, other):  argument
232         return not self.__lt__(other)
320     def __add__(self, other):  argument
324                 + object.__getattribute__(other, k)