Hands-On Convolutional Neural Networks with TensorFlow

Singleton Pattern

It is also common practice to use design patterns in order to solve some software design problems. One of the simplest and most useful design patterns in python is the singleton one. It is used when you want to force the instantiation of a class to only one object, so even if you instantiate this class multiple times in several different places in your project, you will be referencing the same object. In our case if we ask TensorFlow to create multiple nodes or graphs with the same name, it will throw an error. Therefore, we use the singleton pattern while creating the graph to avoid building it twice. 

In the following example we summarize a simple classification model while also ensuring that the graph will not be built ...