module 'matplotlib.cm' has no attribute 'spectral'

[sunnyccui]

For newer versions of matplotlib (>2.2), have to get color map differently: my fix was to change to

cmap = plt.cm.get_cmap("Spectral")
    global_color = cmap(np.linspace(0, 1, cluster_num))

This is for the file medgpc/visualization/vizkernel.py