如何在 python 中用分数提升功率

Question

I'm looking to do the following in python:

[0.12 x 1.616 x (100 x 0.019 x 40)^1/3] x 300 x 527.5

I can't work out how to raise to the power of a fraction. I want the output to be decimal.

(100 x 0.019 x 40)^1/3

Answer 1

To raise a number n to power p, you can use the power operator ** :

n ** p

Answer 2

You can use the math.pow function:

>>> import math
>>> math.pow(27, 1/3)
3.0
>>> help(math.pow)
Help on built-in function pow in module math:

pow(x, y, /)
    Return x**y (x to the power of y).

Or simply the ** (exponent) operator:

>>> 27 ** (1/3)
3.0

Also be careful of your order of operations:

>>> 27 ** 1/3  # same as: (27 ** 1) / 3
9.0
>>> 27 ** (1/3)
3.0