Warnings and exceptions present in numpy.exceptions (e.g, ~numpy.exceptions.ComplexWarning, ~numpy.exceptions.VisibleDeprecationWarning) are no longer exposed in the main namespace.

• np.ComplexWarning
• np.VisibleDeprecationWarning
• np.RankWarning
• np.AxisError
• np.DTypePromotionError
• np.TooHardError

See: numpy/numpy#25966