def __init__(self, callback):
        self.callback = callback
        return
Produce a list of n unique RGBA color tuples based on a colormap
dataset/ETHPy150Open enthought/traits/traits/tests/test_container_events.py/MyClass.__init__--crossover with--dataset/ETHPy150Open mne-tools/mne-python/mne/label.py/_n_colors