In SciPy, there are numerous interpolation function that return a function, e.g., Akima1DInterpolator. I’d like to have the same for a simple linear interpolator. interp1d does the trick, but is deprecated. What can I replace it with?

import numpy as np
from scipy.interpolate import Akima1DInterpolator, interp1d
import matplotlib.pyplot as plt


t = np.linspace(0.0, 1.0, 4)
y = np.array([1.0, 0.8, 0.7, 1.2])

# ak = Akima1DInterpolator(t, y)
# works, but deprecated:
ak = interp1d(t, y, kind="linear")

tt = np.linspace(0.0, 1.0, 200)
yy = ak(tt)

plt.plot(tt, yy)
plt.plot(t, y, "x")
plt.gca().set_aspect("equal")
plt.show()