Olá, comecei a estudar Machile Learning há alguns meses. Com isso comecei a estudar Redes Neurais. Tentei escrever um script para dá uma olhada no comportamento do Perceptron para entender melhor, no entanto, quando comecei a escrever o código e rodei o mesmo me deparei com o seguinte erro: AttributeError: 'Perceptron' object has no attribute 'fit'

[Gustavo-Ufersa]

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from matplotlib.colors import ListedColormap
from mlxtend.plotting import plot_decision_regions

Criação da classe perceptron:

class Perceptron:
def init(self, eta=0.01, n_iter=10):
self.eta = eta
self.n_iter = n_iter

Métodos da classe:

def fit(self, X, y):
self.w_ = np.zeros(1 + X.shape[1])
self.errors_ = []

for _ in range(self.n_iter):
    errors = 0
    for xi, target in zip(X, y):
        update = self.eta * (target - self.predict(xi))
        self.w_[1:] += update * xi
        self.w_[0] += update
        errors += int(update != 0.0)
    self.errors_.append(errors)

def predict(self, X):
return np.where(self.net_input(X) >= 0.0, 1, -1)
def net_input(self, X):
return np.dot(X, self.w_[1:] + self.w_[0])

Criando o dataset

df = pd.read_csv('https://archive.ics.uci.edu/ml/''machine-learning-databases/iris/iris.data', header=None, encoding='utf-8')
df.tail()
y = df.iloc[0:100, 4].values
y = np.where(y == 'Iris-setosa', -1, 1)
X = df.iloc[0:100, [0, 2]].values

criando o plot

plt.scatter(X[:50, 0], X[:50, 1], color ='red', marker='o', label = 'setosa')
plt.scatter(X[50:100, 0], X[50:100, 1], color = 'blue', marker='o', label = 'versicolor')
plt.xlabel('pental lenght ')
plt.ylabel('sepal lenght ')
plt.legend(loc='upper left')
plt.show()

Treinamento do algoritmo

ppn = Perceptron(eta=0.1, n_iter=10)
ppn.fit(X, y)

[Enya191113]

您好！      已经收到您的邮件，我会尽快处理。祝身体健康，万事胜意！

[zenetio]

Ola, O Python é sensivel a identacao, que pode ser o problema do seu codigo. Pra ter certeza, melhor vc anexar o seu arquivo python .py com o codigo. Tks

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________________________________ De: Enya191113 ***@***.***> Enviado: sábado, 10 de dezembro de 2022 01:38 Para: rasbt/python-machine-learning-book-2nd-edition ***@***.***> Cc: Subscribed ***@***.***> Assunto: Re: [rasbt/python-machine-learning-book-2nd-edition] Olá, comecei a estudar Machile Learning há alguns meses. Com isso comecei a estudar Redes Neurais. Tentei escrever um script para dá uma olhada no comportamento do Perceptron para entender melhor, no... 您好！ 已经收到您的邮件，我会尽快处理。祝身体健康，万事胜意！ ― Reply to this email directly, view it on GitHub<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Frasbt%2Fpython-machine-learning-book-2nd-edition%2Fissues%2F133%23issuecomment-1344969341&data=05%7C01%7C%7C5918e72c61eb4b59ba2808dada4f457d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638062331260097625%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=cOVKLG1wyuXnGYzvBd78Az42Md4ZoP%2FDsAf2NuSL9VA%3D&reserved=0>, or unsubscribe<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FAAENGILORUV45CCWXFRSBPTWMPNKFANCNFSM6AAAAAASZ5V34E&data=05%7C01%7C%7C5918e72c61eb4b59ba2808dada4f457d%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638062331260097625%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=iXF%2BOEJpOBgdba4y5Sq1Rgz3UwxskJqAe4yoSMu3TAs%3D&reserved=0>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Enya191113]

您好！      已经收到您的邮件，我会尽快处理。祝身体健康，万事胜意！