>>> """
==============
Keypress event
==============

Show how to connect to keypress events.
"""
... import sys
... import numpy as np
... import matplotlib.pyplot as plt
... 
... 
... def on_press(event):
...     print('press', event.key)
...     sys.stdout.flush()
...     if event.key == 'x':
...         visible = xl.get_visible()
...         xl.set_visible(not visible)
...         fig.canvas.draw()
... 
... 
... # Fixing random state for reproducibility
... np.random.seed(19680801)
... 
... fig, ax = plt.subplots()
... 
... fig.canvas.mpl_connect('key_press_event', on_press)
... 
... ax.plot(np.random.rand(12), np.random.rand(12), 'go')
... xl = ax.set_xlabel('easy come, easy go')
... ax.set_title('Press a key')
... plt.show()
...