Mastering Python Design Patterns

Summary

In this chapter, you learned how to use the Proxy design pattern. We used the Proxy pattern to implement a surrogate of an actual class when we want to act before (or after) accessing it. There are four different Proxy types. They are as follows:

• A remote proxy, which represents an object that lives in a remote location (for example, our own remote server or cloud service)
• A virtual proxy to delay the initialization of an object until it is actually used
• A protection/protective proxy, which is used to access control to an object that handles sensitive information
• When we want to extend the behavior of an object by adding support such as reference counting, we use a smart (reference) proxy

In the first code example, we created a virtual proxy ...