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Boolean Indexing II

import numpy as np

lst = [

[12, 13, 14, 12, 16, 14, 11, 10, 9],

[11, 14, 12, 15, 15, 16, 10, 12, 11],

[10, 12, 12, 15, 14, 16, 10, 12, 12],

[ 9, 11, 16, 15, 14, 16, 15, 12, 10],

[12, 11, 16, 14, 10, 12, 16, 12, 13],

[10, 15, 16, 14, 14, 14, 16, 15, 12],

[13, 17, 14, 10, 14, 11, 14, 15, 10],

[10, 16, 12, 14, 11, 12, 14, 18, 11],

[10, 19, 12, 14, 11, 12, 14, 18, 10],

[14, 22, 17, 19, 16, 17, 18, 17, 13],

[10, 16, 12, 14, 11, 12, 14, 18, 11],

[10, 16, 12, 14, 11, 12, 14, 18, 11],

[10, 19, 12, 14, 11, 12, 14, 18, 10],

[14, 22, 12, 14, 11, 12, 14, 17, 13],

[10, 16, 12, 14, 11, 12, 14, 18, 11]]

A = np.array(lst)

A[A<15] = 0

A[A>=15] = 1

print(A)