Perplexity from Entropy

Problem

Convert an entropy measured in bits to perplexity:

perplexity = 2^H

The result is the effective number of equally likely outcomes.

Hint

Perplexity is the exponentiation of entropy, undoing the logarithm.

case 1

in: [0]

expected: 1

case 2

in: [1]

expected: 2

case 3

in: [4]

expected: 16

case 4

in: [0.5]

expected: 1.4142135623730951

Starter codePython

def perplexity_from_entropy(h):
    # Your code here
    pass

4 test cases · run your code against them in the editor