interactive_pick_dataPoint_example.py

#!/usr/bin/python3
'''
Copyright (C) Saeed Gholami Shahbandi. All rights reserved.
Author: Saeed Gholami Shahbandi
This file is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.  This program is distributed in
the hope that it will be useful, but WITHOUT ANY WARRANTY; without
even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.  You should have received a copy of the GNU Lesser General
Public License along with this program. If not, see
<http://www.gnu.org/licenses/>
'''

import matplotlib.pyplot as plt

##### picking a data point
def on_pick(event):
    print event.ind[0]
    
fig = plt.figure(figsize=(6,8))
ax = fig.add_subplot(111)
ax.plot ([1,1,1,1], [1,2,3,4], 'ko', picker=10)
cid = fig.canvas.mpl_connect('pick_event', on_pick)
plt.axis('equal')
plt.tight_layout()
plt.show()

##### coordinate of the click event
def on_click(event):
    print event.xdata, event.ydata

fig = plt.figure(figsize=(6,8))
ax = fig.add_subplot(111)
ax.plot ([1,1,1,1], [1,2,3,4], 'ko')
cid = fig.canvas.mpl_connect('button_press_event', on_click)
plt.axis('equal')
plt.tight_layout()
plt.show()