Hi,

I'd like to create a legend for a plot with a single label applying to two different types of points -- i.e. having different colors and marker types. There doesn't seem to be any way of doing this. Here's some simple demonstration code:

fig, ax = plt.subplots()
p1 = ax.scatter([0.1],[0.5],c='r',marker='s')
p2 = ax.scatter([0.3],[0.2],c='b',marker='o')
l = ax.legend((p1,p2),['points'],scatterpoints=2)
plt.show()

This yields a legend with two red squares. What I want is a red square and a blue circle. I've tried variations on the legend call and have not been able to find a way to get this to work (though it is possible to use ncol=2 and an empty string for one of the labels, this leaves a wide gap between the points). I think there should be a way to do this. This is somewhat related to the issue that, though one can give a sequence of colors for points in a call to scatter, there is no way to give a sequence of marker types.

Jon