Correct!

Exercise:

Insert the missing method to print the number of values in the array that are NOT zeros:

import numpy as np from scipy.sparse import csr_matrix arr = np.array([[0, 0, 0], [0, 0, 1], [1, 0, 2]]) print(csr_matrix(arr).count_nonzero())

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Correct!

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import numpy as np
from scipy.sparse import csr_matrix

arr = np.array([[0, 0, 0], [0, 0, 1], [1, 0, 2]])

print(csr_matrix(arr).w3exercise_input_no_0
())

Exercise:

Not Correct

Correct!

You have finished all 20 SCIPY exercises.