A number of Python code samples is provided for the proxies to illustrate both their general operation and their capabilities. Most of the proxy configurations shown in the examples can be easily reproduced using the MC graphical interface. However, some of them utilize the advanced flexibility of PNS and therefore require the use of configuration scripts written in Python. From MC these can be implemented, maintained and edited using the Class editor. (The Class editor is available under the Proxies tab of the PNS MC component. When creating a new class, click on the Class editor button under the list of available classes.)