祝余whfyimport matplotlib.pyplot as pltimport numpy as npplt.rcParams["font.sans-serif"] = ["SimHei"]plt.rcParams["axes.unicode_minus"] = Falsex = np.linspace(-np.pi, np.pi, 256, endpoint = True)y1,y2 = np.sin(x),np.cos(x)fig = plt.figure()ax = fig.add_subplot(111)ax.set_xlim(x.min() * 1.1, x.max() * 1.1)ax.set_xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi],[r'$-\pi$', r'$-\pi/2$', r'$0$', r'$\pi/2$', r'$\pi$'])ax.set_yticks([-1.0, -0.5, 0, 0.5, 1.0],[r'$-1.0$', r'$-0.5$', r'$0$', r'$0.5$', r'$1.0$'])ax.plot(x, y2, color='blue', linewidth=1.0, alpha=0.5, label='COS')ax.plot(x, y1, color='red', linewidth=1.0, linestyle='--', label='SIN')ax.fill_between(x, (np.abs(x) < 0.5) & (np.abs(x) >-0.5), np.cos(x), np.cos(x) > 0.5, facecolor='green', alpha=0.25)ax.annotate("cos(1)", xy=(1.0, np.cos(1)), xytext=(np.pi/2-0.3, 0.8), arrowprops=dict(arrowstyle="->"))ax.grid(visible=True)ax.set_title('cos & sin')ax.legend()plt.show()