Overlaying points on Matplotlib collection object?


I create a collection item, add it to the current axis, and try to plot data
points over it but the points do not show up. Here is my code:

    fig = plt.figure(figsize=(10,10))
    ax = fig.gca()
    bb_collect = beachball.Beach([strike,dip,rake], linewidth=0.4,
facecolor='gray', bgcolor='w', edgecolor='k',alpha=1.0, xy=(0,0), width=2,
size=100, nofill=False,zorder=100)
    a = ax.add_collection(bb_collect)
    ax.autoscale_view(tight=False, scalex=True, scaley=True)

I can plot the collection by itself and the points by themselves, but can't
seem to plot the points on top of the collection object. Can anyone tell me
what I'm doing wrong?



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