On Sunday, June 5, 2016 at 1:06:21 PM UTC+5:30, Peter Otten wrote: > ICT Ezy wrote: > > >>>> 2 ** 3 ** 2 > > Answer is 512 > > Why not 64? > > Order is right-left or left-right? > > ** is a special case: > > """ > The power operator ** binds less tightly than an arithmetic or bitwise unary > operator on its right, that is, 2**-1 is 0.5. > """ > https://docs.python.org/3.5/reference/expressions.html#id21 > > Here's a little demo: > > $ cat arithdemo.py > class A: > def __init__(self, value): > self.value = str(value) > def __add__(self, other): > return self._op(other, "+") > def __pow__(self, other): > return self._op(other, "**") > def __repr__(self): > return self.value > def _op(self, other, op): > return A("({} {} {})".format(self.value, op, other.value)) > $ python3 -i arithdemo.py > >>> A(1) + A(2) + A(3) > ((1 + 2) + 3) > >>> A(1) ** A(2) ** A(3) > (1 ** (2 ** 3))
Thank you very much for your explanation -- https://mail.python.org/mailman/listinfo/python-list
