Example to show connecting events that occur when the figure closes.
from __future__ import print_function
import matplotlib.pyplot as plt
def handle_close(evt):
print('Closed Figure!')
fig = plt.figure()
fig.canvas.mpl_connect('close_event', handle_close)
plt.text(0.35, 0.5, 'Close Me!', dict(size=30))
plt.show()