在IPython中输入:

import numpy as np
import matplotlib.pyplot as plt


r = np.arange(0, 3.0, 0.01)
theta = 1.5* np.pi * r

ax = plt.subplot(111, projection='polar')
ax.plot(theta, r, color='r', linewidth=3)
ax.set_rmax(2.0)
ax.grid(True)

ax.set_title("my polor diagram", va='bottom')
plt.show()

还不知道怎样把标题用中文