matplotlib.pyplot blackmagic to make CTRL-C work again

pyplot_interrupt_handler.py

import sys
import matplotlib.pyplot as plt

try:
    # Put matplotlib.pyplot in interactive mode so that the plots are shown in a background thread.
    plt.ion()
    while(True):
        plt.show()

except KeyboardInterrupt:
    print ""
    sys.exit(0)

More simple solution: Add at beginning of your program

import signal
signal.signal(signal.SIGINT, signal.SIG_DFL)