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from mpl_toolkits.axes_grid.parasite_axes import SubplotHost
import matplotlib.pyplot as plt
fig = plt.figure(1)
host = SubplotHost(fig, 111)
fig.add_subplot(host)
par = host.twinx()
host.set_xlabel("Distance")
host.set_ylabel("Density")
par.set_ylabel("Temperature")
p1, = host.plot([0, 1, 2], [0, 1, 2], label="Density")
p2, = par.plot([0, 1, 2], [0, 3, 2], label="Temperature")
host.axis["left"].label.set_color(p1.get_color())
par.axis["right"].label.set_color(p2.get_color())
host.legend()
plt.show()
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