Python第三方库——Matplotlib_在同个figure中绘制多个图并给出legend

import matplotlib.pyplot as plt line1, = plt.plot([1,2,3], linestyle='--') line2, = plt.plot([3,2,1], linewidth=4) # Create a legend for the first line. plt.legend([line1, line2], ["Line 1", "Line 2

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