How to disable dropout while prediction in keras?

Question

I am using dropout in neural network model in keras. Little bit code is like

model.add(Dropout(0.5))
model.add(Dense(classes))

For testing,

Answer 1

Dropout removes certain neurons form play, and to compensate for that we usually take one of two ways.

1. scaling the activation at test time
2. inverting the dropout during the training phase

And keras uses the second form of correction as you can see here