使用python遮罩/裁剪指定曲线上方的等高线部分

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(-5, 5, 100)
y = np.linspace(-5, 5, 100)
X, Y = np.meshgrid(x, y)
Z = np.sin(np.sqrt(X**2 + Y**2))
plt.contourf(X, Y, Z, levels=20)
plt.colorbar()

curve_x = np.linspace(-5, 5, 100)
curve_y = np.sin(curve_x)

path = plt.Path(np.column_stack((curve_x, curve_y)))

mask = np.zeros_like(Z, dtype=bool)
plt.fill_between(curve_x, curve_y, np.min(Z), color='white')
plt.fill_between(curve_x, curve_y, np.max(Z), color='white')
plt.fill_betweenx(curve_y, np.min(X), np.max(X), color='white')
plt.fill_betweenx(curve_y, np.min(X), np.max(X), where=path.contains_points(np.column_stack((X.flatten(), Y.flatten()))).reshape(X.shape), color='none')
plt.imshow(mask, extent=(np.min(X), np.max(X), np.min(Y), np.max(Y)), origin='lower', cmap='gray', alpha=0.5)

plt.show()