Question

How to compute 2 to the power k for all elements in an array in Python

Answer 1

import numpy as np

arr = np.array([2, 3, 4, 7, 9])

print(np.exp2(arr))

 
 
 
'''
run:
 
[  4.   8.  16. 128. 512.]
 
'''

 

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Answer 2

import numpy as np

arr = np.array([2, 3, 4, 7, 9])

print([2**k for k in arr])

 
 
 
'''
run:
 
[4, 8, 16, 128, 512]
 
'''

 

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