.. _sphx_glr_gallery_event_handling_timers.py: ====== Timers ====== Simple example of using general timer objects. This is used to update the time placed in the title of the figure. .. image:: /gallery/event_handling/images/sphx_glr_timers_001.png :align: center .. code-block:: python import matplotlib.pyplot as plt import numpy as np from datetime import datetime def update_title(axes): axes.set_title(datetime.now()) axes.figure.canvas.draw() fig, ax = plt.subplots() x = np.linspace(-3, 3) ax.plot(x, x ** 2) # Create a new timer object. Set the interval to 100 milliseconds # (1000 is default) and tell the timer what function should be called. timer = fig.canvas.new_timer(interval=100) timer.add_callback(update_title, ax) timer.start() # Or could start the timer on first figure draw #def start_timer(evt): # timer.start() # fig.canvas.mpl_disconnect(drawid) #drawid = fig.canvas.mpl_connect('draw_event', start_timer) plt.show() **Total running time of the script:** ( 0 minutes 0.033 seconds) .. only :: html .. container:: sphx-glr-footer .. container:: sphx-glr-download :download:`Download Python source code: timers.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: timers.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature `Gallery generated by Sphinx-Gallery `_