如何在matplotlib imshow等高线图上显示数据点？

import matplotlib.pyplot as plt
import numpy as np

# 生成等高线图数据
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))

# 绘制等高线图
plt.imshow(Z, extent=[-5, 5, -5, 5], origin='lower', cmap='jet')
plt.colorbar()

# 显示数据点
data_x = np.random.uniform(-4, 4, 50)
data_y = np.random.uniform(-4, 4, 50)
plt.scatter(data_x, data_y, c='red', marker='o')

plt.show()