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from pylab import figure, nx, show fig = figure() ax = fig.add_subplot(111) t = nx.arange(0.0,3.01,0.01) s = nx.sin(2*nx.pi*t) c = nx.sin(4*nx.pi*t) ax.fill(t, s, 'b', t, c, 'g', alpha=0.2) show()