TypeError: unsupported operand type(s) for *: 'builtin_function_or_method' and 'int'

Question

I have a code, which implements Perceptron manually. Unfortunately, I am receiving an error that I have no knowledge of how to fix it... I searched and saw that this error normally occurs when a method is used and is not called, but in this point, I do not know where is any method I should be calling in the error line.

My code is here:

import random

class Perceptron:
    def __init__(self, amostras, saidas, taxa_aprendizado = 0.1, epocas = 1000, limiar = -1):
        self.amostras = amostras
        self.saidas = saidas
        self.taxa_aprendizado = taxa_aprendizado
        self.epocas = epocas
        self.limiar = limiar
        self.n_amostras = len(amostras)
        self.n_atributos = len(amostras[0])
        self.pesos = []

    def treinar(self):
        for amostra in self.amostras:
            amostra.insert(0, -1)

        for i in range(self.n_atributos):
            self.pesos.append(random.random)

        self.pesos.insert(0, self.limiar)
        n_epocas = 0

        while True:

            erro = False

            for i in range(self.n_amostras):
                uzin = 0
                for j in range(self.n_atributos + 1):
                    uzin += (self.pesos[j])*(self.amostras[i][j])
                y = self.degrau(uzin)
                if y != saidas[i]:
                    erro_aux = self.saidas[i] - y
                    for j in range(self.n_atributos + 1):
                        uzin += self.pesos[j] + (self.taxa_aprendizado) * (erro_aux) * (self.amostras[i][j])
                    erro = True

            n_epocas +=1

            if not erro or n_epocas > self.epocas:
                break

        print(self.pesos)
    def degrau(self, u):
        if u >=0:
            return 1
        else:
            return 0




entradas = [[0,0], [0,1], [1,0], [1,1]]
saidas = [0,1,1,1]

rede = Perceptron(entradas, saidas)
rede.treinar()

print(rede.amostras)

Traceback (most recent call last): File "C:/Users/nick/PycharmProjects/CursoMachineLearning/redes_neurais/perceptronzin.py", line 58, in rede.treinar() File "C:/Users/nick/PycharmProjects/CursoMachineLearning/redes_neurais/perceptronzin.py", line 31, in treinar uzin += (self.pesos[j])*(self.amostras[i][j]) TypeError: unsupported operand type(s) for *: 'builtin_function_or_method' and 'int'

Answer 1

In line 19 you created a list of function objects instead of floats.
Use:

self.pesos.append(random.random())

instead of

self.pesos.append(random.random)