[PYTHON] Invert numpy Boolean array in tilde

>>> import numpy as np

>>> l1 = np.array([True, False, True])
>>> ~l1
array([False,  True, False])

>>> l2 = np.array([[[True], [False], [True]], [[False], [True], [False]], [[True], [True], [True]]])
>>> ~l2
array([[[False],
        [ True],
        [False]],

       [[ True],
        [False],
        [ True]],

       [[False],
        [False],
        [False]]])

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