[英]ValueError : Weights for model sequential have not yet been created
我正在测试一个基本的神经网络 model。 但是在 go 之前,我遇到了屏幕截图中显示的这个错误。
这是我的代码:
import numpy as np
# Training Data
x_train = np.array([[1.0,1.0]])
y_train = np.array([2.0])
for i in range(3,10000,2):
x_train = np.append(x_train,[[i,i]],axis = 0)
y_train = np.append(y_train,[i+i],axis = 0)
# Test Data
import numpy as np
x_test = np.array([[2.0,2.0]])
y_test = np.array([4.0])
for i in range(4,8000,4):
x_test = np.append(x_test,[[i,i]],axis = 0)
y_test = np.append(y_test,[i+i])
from tensorflow import keras
from keras.layers import Flatten # to flatten the input data
from keras.layers import Dense # for the hidden layer
# We'll follow sequential method i.e. one after the other(input layer ---> hidden layer---> output layer)
model = keras.Sequential()
# For input layer
model.add(Flatten(input_shape = x_train[0].shape)) # input layer
# For Hidden layer
model.add(Dense(2,activation = 'relu')) # '2' represents a no. of neurons
# For Output layer
model.add(Dense(1)) # By default, activation = 'linear'
# before training
bf_train = model.get_weights()
bf_train
错误是:
ValueError:尚未创建 model 顺序的权重。 当 Model 首次在输入上调用或使用input_shape
调用build()
时,会创建权重。
你不应该混合tf 2.x
和独立keras
。 您应该按如下方式导入
from tensorflow import keras
from tensorflow.keras.layers import Flatten # to flatten the input data
from tensorflow.keras.layers import Dense # for the hidden layer
现在,运行代码,你会得到一些重量。
[array([[-0.43643105, -1.0268047 ],
[ 1.0003897 , 1.1105307 ]], dtype=float32),
array([0., 0.], dtype=float32),
array([[-0.19884515],
[-0.78100944]], dtype=float32),
array([0.], dtype=float32)]
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