What will be printed when the following code runs and the user clicks on the red circle?

What will be printed when the following code runs and the user clicks on the red circle?

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
circle = plt.Circle((0.5, 0.5), 0.1, color='red', picker=True)
ax.add_patch(circle)

def on_pick(event):
    print('Picked:', event.artist)

fig.canvas.mpl_connect('pick_event', on_pick)
plt.show()