import numpy as np
from matplotlib import pyplot as plt

plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True

def mouse_event(event):
    print('x: {} and y: {}'.format(event.xdata, event.ydata))

fig = plt.figure()
cid = fig.canvas.mpl_connect('button_press_event', mouse_event)

x = np.linspace(-10, 10, 100)
y = np.sin(x)

plt.plot(x, y)

plt.show()

x: -3.099305446290094和y: -0.013811108549791173
x: -0.2865652183685867和y: -0.2067543563498595
x: -3.0280968329249927和y: -0.1844916739113902
x: -5.7696284474814和y: 0.4240216460734405
x: -3.9182044999887626和y: 0.6837529411889172