np.dot()

import numpy as np

x = np.array([[0.01], [0.02], [0.01]])  # 输入层
y = np.array([[0.4, 0.4, 0.4]])

O2 = x.dot(y)
print(O2)

O3 = np.dot(x, y)
print(O3)

x.dot(y) 等价于 np.dot(x,y)

结果：

D:Anacondapython.exe F:/BP_neural_network/BP_test.py
[[0.004 0.004 0.004]
 [0.008 0.008 0.008]
 [0.004 0.004 0.004]]
[[0.004 0.004 0.004]
 [0.008 0.008 0.008]
 [0.004 0.004 0.004]]

Process finished with exit code 0