Метод срединной точки (доделать)

import matplotlib.pyplot as plt
import numpy as np
from scipy.misc import derivative as der

def F(x):
    return x**4 + x**2 + x + 1

def Par(a, b, eps, x):
    #метод средней точки
    for i in np.arange(a, b, eps/10):
        x.append(i)
    y = [F(i) for i in x]
    x_temp = (a+b)/2
    while abs(der(F(x_temp))) < eps:
        x_temp = (a+b)/2
        if der(F(x_temp)) < 0:
            b = x_temp
        else:
            a = x_temp
    y = [F(i) for i in x]
    plt.plot (x, y)
    plt.grid(True)
    plt.show()
    print("Метод срединной точки: \nx* = ", x_temp, "\ny_min = ", F(x_temp))


def main():
    a = -1
    b = 0
    eps = 0.01
    x = []
    for i in np.arange(a, b, eps/10):
        x.append(i)

if __name__ == "__main__":
    main()