arr_1 = np.array([5, 1, 6, 3, 3, 10, 3, 6, 12])
arr_2 = np.array([10, 20, 30, 40, 50, 60, 70, 80, 90])
arr_idx_num_3 = np.where(arr_1 == 3)[0]
print(arr_idx_num_3) ## [3 4 6]
#how to i get this array Numpy with "arr_idx_num_3"
arr_2 = [40 50 70]
Just use it like:
print(arr_2[arr_idx_num_3])
output:
>>> [40 50 70]
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