<human>:  How to do a scatter plot with empty circles in Python?
<bot>: Here is some code to scatter a plot with x, y position of `np.random.randn(100)` and face color equal to none

plt.scatter(np.random.randn(100), np.random.randn(100), facecolors='none')

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.