Change initial angle of spline created with scipy.interpolate.splprep

Question

I have the following code that creates a spline:

import matplotlib.pyplot as plt
import numpy as np
from scipy import interpolate
l = [
    (5, 5),
    (4.92403876506104, 20.86824088833465),
    (4.698463103929543, 31.710100716628343),
    (9.396926207859085, 31.710100716628343),
    (9.84807753012208, 20.86824088833465),
    (10, 5),
]
nodes = np.array(l)

x = nodes[:, 0]
y = nodes[:, 1]

tck, u = interpolate.splprep([x, y], s=0)
xnew, ynew = interpolate.splev(np.linspace(0, 1, 100), tck, der=0)

plt.plot(x, y, "o", xnew, ynew)
plt.legend(["data", "spline"])
plt.axis([x.min() - 1, x.max() + 1, y.min() - 1, y.max() + 2])
plt.show()

However, I would like to change the initial angle of the spline to be ~90deg (closer to the next point), as so (green line):

Is there a way to do this with scipy.interpolate.splprep or another function/library that would be better suited?