除了标准+,-,*和/运营商; 但什么是这些均值(**,^,%,//)？
>>> 9+float(2) # addition
11.0
>>> 9-float(2) # subtraction
7.0
>>> 9*float(2) # multiplication
18.0
>>> 9/float(2) # division
4.5
>>>
>>> 9**float(2) # This looks like a square, (i.e. power 2)
81.0
>>> 9**float(3) # So ** is equivalent to `math.pow(x,p)` ?
729.0
又如何^操作？
>>> 9^int(2) # What is `^` in `x^u` , it only allows `int` for `u` …