Matplotlib:如何设置极坐标图的θ范围？

import numpy as np
import matplotlib.pyplot as plt

# 创建极坐标图
ax = plt.subplot(111, projection='polar')

# 设置θ范围的偏移量
ax.set_theta_offset(np.pi/4)

# 绘制极坐标图
ax.plot(np.linspace(0, 2*np.pi, 100), np.linspace(0, 1, 100))

# 显示图形
plt.show()

import numpy as np
import matplotlib.pyplot as plt

# 创建极坐标图
ax = plt.subplot(111, projection='polar')

# 设置θ范围的方向
ax.set_theta_direction('counterclockwise')

# 绘制极坐标图
ax.plot(np.linspace(0, 2*np.pi, 100), np.linspace(0, 1, 100))

# 显示图形
plt.show()