Index.__add__ OK but __sub__ not? #19369
Description
Curious about why Index.__add__ tries does the natural thing but Index.__sub__ raises TypeError.
def __add__(self, other): return Index(np.array(self) + other) def __radd__(self, other): return Index(other + np.array(self)) __iadd__ = __add__ def __sub__(self, other): raise TypeError("cannot perform __sub__ with this index type: " "{typ}".format(typ=type(self)))