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"""
=============
Keypress Demo
=============
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()
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