python玫瑰图

import numpy as np
import matplotlib.pyplot as plt
import string
import math

x1=[np.pi*i/10 for i in range(1,21)]#这里要计算好角度问题，360°等于2pi，分成20份那就除以20.
x2=np.pi*1/30
#x2=[np.pi/15+np.pi*i/30 for i in range(1,61)]
fig=plt.figure(figsize=(13.44,7.5))
ax=fig.add_subplot(111,projection='polar')
ax.bar(x=x1,height=80,width=np.pi/