Multi tool use

Raising elements of a list to powers indicated in another list

I need to raise my list [23, 43, 32, 27, 11] to the powers indicated in this list [3, 5, 4, 3, 2].

Meanding the 23 should be raised to the power of 3, 43 to the power of 5 etc...

I can do the whole list to one power with the help of this question: Raising elements of a list to a power but not like how I need.

Should I use two loops? Many thanks for the help.

[ x**y for x,y in zip([23,43,32,27,11],[3, 5, 4, 3, 2, 2]) ]

2 Answers
2

You could use zip():

zip()

>>> a = [23, 43, 32, 27, 11]
>>> b = [3, 5, 4, 3, 2]
>>> c = [x**y for x, y in zip(a, b)]
>>> c
[12167, 147008443, 1048576, 19683, 121]


or map() and operator.pow():

map()

operator.pow()

>>> from operator import pow
>>> d = list(map(pow, a, b))
>>> d
[12167, 147008443, 1048576, 19683, 121]


zip

map

Use numpy:

import numpy as np

b = np.array([23, 43, 32, 27, 11])
e = np.array([3, 5, 4, 3, 2, 2])

# constrain sizes (like zip)
m = min(b.shape[0], e.shape[0])
b = b[:m]
e = e[:m]

print(b**e) # 1. typical method
print(np.power(b, e)) # 2. you might like this better in some scenarios


e

p

numpy

numpy

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