Python MulLayer示例

示例#1

from ch05.layer_naive import MulLayer, AddLayer

apple = 100
apple_num = 2
orange = 150
orange_num = 3
tax = 1.1

# Layers
mul_apple_layer = MulLayer()
mul_orange_layer = MulLayer()
add_apple_orange_layer = AddLayer()
mul_tax_layer = MulLayer()

# Forward propagation
apple_price = mul_apple_layer.forward(apple, apple_num)
orange_price = mul_orange_layer.forward(orange, orange_num)
all_price = add_apple_orange_layer.forward(apple_price, orange_price)
price = mul_tax_layer.forward(all_price, tax)

# Backward propagation
dprice = 1
dall_price, dtax = mul_tax_layer.backward(price)
dapple_price, dorange_price = add_apple_orange_layer.backward(dall_price)
dorange, dorange_num = mul_orange_layer.backward(dorange_price)
dapple, dapple_num = mul_apple_layer.backward(dapple_price)

print(price)
print(dapple_num, dapple, dorange_num, dorange, dtax)

示例#2

# coding: utf-8
from ch05.layer_naive import MulLayer

apple = 100
apple_num = 2
tax = 1.1

mul_apple_layer = MulLayer()
mul_tax_layer = MulLayer()

# forward
apple_price = mul_apple_layer.forward(apple, apple_num)
price = mul_tax_layer.forward(apple_price, tax)

# backward
dprice = 1
dapple_price, dtax = mul_tax_layer.backward(dprice)
dapple, dapple_num = mul_apple_layer.backward(dapple_price)

print("price:", int(price))
print("dApple:", dapple)
print("dApple_num:", int(dapple_num))
print("dTax:", dtax)

示例#3

文件： buy_aoole_orange.py 项目： guodetm/deeplearning_python

from ch05.layer_naive import MulLayer, AddLayer

apple = 100
orange = 150
apple_num = 2
orange_num = 3
tax = 1.1

mul_app_layer = MulLayer()
mul_org_layer = MulLayer()
add_layer = AddLayer()
mul_tax_layer = MulLayer()

# forward
apple_price = mul_app_layer.forward(apple, apple_num)
orange_price = mul_org_layer.forward(orange, orange_num)
add_price = add_layer.forward(apple_price, orange_price)
price = mul_tax_layer.forward(add_price, tax)
print(price)

# backward
dprice = 1
dadd_price, dtax = mul_tax_layer.backward(dprice)
dapple, dorange = add_layer.backward(dadd_price)
dorange_price, dorange_num = mul_org_layer.backward(dorange)
dapple_price, dapple_num = mul_app_layer.backward(dapple)
print(dtax, dapple_price, dapple_num, dorange_price, dorange_num)