.. _old_animation-animation_blit_tk:

old_animation example code: animation_blit_tk.py
================================================

[`source code <animation_blit_tk.py>`_]

::

    # For detailed comments on animation and the techniqes used here, see
    # the wiki entry http://www.scipy.org/Cookbook/Matplotlib/Animations
    
    from __future__ import print_function
    
    import matplotlib
    matplotlib.use('TkAgg')
    
    import sys
    import pylab as p
    import numpy as npy
    import time
    
    ax = p.subplot(111)
    canvas = ax.figure.canvas
    
    
    # create the initial line
    x = npy.arange(0,2*npy.pi,0.01)
    line, = p.plot(x, npy.sin(x), animated=True, lw=2)
    
    def run(*args):
        background = canvas.copy_from_bbox(ax.bbox)
        # for profiling
        tstart = time.time()
    
        while 1:
            # restore the clean slate background
            canvas.restore_region(background)
            # update the data
            line.set_ydata(npy.sin(x+run.cnt/10.0))
            # just draw the animated artist
            ax.draw_artist(line)
            # just redraw the axes rectangle
            canvas.blit(ax.bbox)
    
            if run.cnt==1000:
                # print the timing info and quit
                print('FPS:', 1000/(time.time()-tstart))
                sys.exit()
    
            run.cnt += 1
    run.cnt = 0
    
    
    p.subplots_adjust(left=0.3, bottom=0.3) # check for flipy bugs
    p.grid() # to ensure proper background restore
    manager = p.get_current_fig_manager()
    manager.window.after(100, run)
    
    p.show()
    
    
    
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)