关于Keras在测试不能使用正则dropout的解决

Keras官方文档：

A Keras model has two modes: training and testing. Regularization mechanisms, such as Dropout and L1/L2 weight regularization, are turned off at testing time.

Keras模型有两种模式：训练和测试。 在测试时关闭正常化机制，例如Dropout和L1 / L2权重正则化。

所以我们需要将模式转为训练模式，在测试时才能使用dropout!!!

在官方文档中

keras.backend.learning_phase()

Returns the learning phase flag.

The learning phase flag is a bool tensor (0 = test, 1 = train) to be passed as input to any Keras function that uses a different behavior at train time and test time.

通过设置learning_phase来控制模式

import keras

keras.backend.set_learning_phase(1)