python-3.x - 请问我该如何解决错误hep！！！！它在 err 参数中给出了无效的语法错误

Question

from numpy import array, dot
from random import choice
from pylab import ylim, plot
from matplotlib import pyplot as plt

step_function = lambda x: 0 if x < 0 else 1

training_dataset = [

    (array([0,0,1]), 0),

    (array([0,1,1]), 1),

    (array([1,0,1]), 1),

    (array([1,1,1]), 1),

]

weights  = input("Enter your value: ")

error = []

learning_rate = input("Enter your value: ")

n = 100

for j in range(n):

    x, expected = choice(training_dataset)

    result = (dot(weights, x)
    err = expected - step_function(result)
    error.append(err)
    weights += learning_rate * err * x
   

for x, _ in training_dataset:

    result = dot(x, weights)

    print("{}: {} -> {}".format(x[:2], result, step_function(result)))

ylim([-1,1])

plot(error)
plt.show()

标签： python-3.x