import matplotlib.pyplot as plt import numpy as np import matplotlib.pyplot as plt ax = plt.subplot(111) t1 = np.arange(0.0, 1.0, 0.01) for n in [1, 2, 3, 4]: plt.plot(t1, t1**n, label="n=%d"%(n,)) leg = plt.legend(loc='best', ncol=2, mode="expand", shadow=True, fancybox=True) leg.get_frame().set_alpha(0.5) plt.show()