import matplotlib.pyplot as plt

from matplotlib.widgets import Button

class Show:

    def __init__(self, line, x):

        self.line = line

        self.x = x 

        self.cid = line.figure.canvas.mpl_connect('button_press_event', self)

    def __call__(self, event):

        print self.x

class Click:

    def __init__(self, line):

        self.line = line

        self.cid = line.figure.canvas.mpl_connect('button_press_event', self)

    def __call__(self, event):

        global x #글로벌 변수

        x = 1

class Index(object):

    def __init__(self):

        pass

    def click(self, event):

        Click(line)

    def show(self, event):

        Show(line, x) 

if __name__ == '__main__':

    x = [] #글로벌 변수

    fig = plt.figure()

    ax  = fig.add_subplot(2,1,1)

    plt.subplots_adjust(bottom=0.2)

    line,  = ax.plot([0], [0])

    callback = Index()

    axclick = plt.axes([0.7, 0.05, 0.1, 0.075])

    bclick = Button(axclick, 'click')

    bclick.on_clicked(callback.click)

    axshow = plt.axes([0.81, 0.05, 0.1, 0.075])

    bshow = Button(axshow, 'show')  

    bshow.on_clicked(callback.show)

    plt.show()