.. _pylab_examples-system_monitor: pylab_examples example code: system_monitor.py ============================================== .. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/system_monitor.py :: import time import matplotlib.pyplot as plt import numpy as np def get_memory(): "Simulate a function that returns system memory" return 100*(0.5 + 0.5*np.sin(0.5*np.pi*time.time())) def get_cpu(): "Simulate a function that returns cpu usage" return 100*(0.5 + 0.5*np.sin(0.2*np.pi*(time.time() - 0.25))) def get_net(): "Simulate a function that returns network bandwidth" return 100*(0.5 + 0.5*np.sin(0.7*np.pi*(time.time() - 0.1))) def get_stats(): return get_memory(), get_cpu(), get_net() fig, ax = plt.subplots() ind = np.arange(1, 4) # show the figure, but do not block plt.show(block=False) pm, pc, pn = plt.bar(ind, get_stats()) centers = ind + 0.5*pm.get_width() pm.set_facecolor('r') pc.set_facecolor('g') pn.set_facecolor('b') ax.set_xlim([0.5, 4]) ax.set_xticks(centers) ax.set_ylim([0, 100]) ax.set_xticklabels(['Memory', 'CPU', 'Bandwidth']) ax.set_ylabel('Percent usage') ax.set_title('System Monitor') start = time.time() for i in range(200): # run for a little while m, c, n = get_stats() # update the animated artists pm.set_height(m) pc.set_height(c) pn.set_height(n) # ask the canvas to re-draw itself the next time it # has a chance. # For most of the GUI backends this adds an event to the queue # of the GUI frameworks event loop. fig.canvas.draw_idle() try: # make sure that the GUI framework has a chance to run its event loop # and clear any GUI events. This needs to be in a try/except block # because the default implemenation of this method is to raise # NotImplementedError fig.canvas.flush_events() except NotImplementedError: pass stop = time.time() print("{fps:.1f} frames per second".format(fps=200 / (stop - start))) Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)