微分scipy.interpolate.interp1d

InterpolatedUnivariateSpline ,它有 derivative method

from scipy.interpolate import InterpolatedUnivariateSpline as IUS
import numpy as np
import matplotlib.pyplot as plt

x = np.arange(10)
y = x**2 + np.random.normal(size=10)

u = IUS(x,y)
u_der = u.derivative()

plt.plot(x, y, 'go')
plt.plot(x, u(x), 'b--')
plt.plot(x, u_der(x), 'k')