more realistic example we'll dig into more class syntax details in the next before we dothoughi' like to show you more realistic example of classes in action that' more practical than what we've seen so far in this we're going to build set of classes that do something more concrete--recording and processing information about people as you'll seewhat we call instances and classes in python programming can often serve the same roles as records and programs in more traditional terms specificallyin this we're going to code two classesperson-- class that creates and processes information about people manager-- customization of person that modifies inherited behavior along the waywe'll make instances of both classes and test out their functionality when we're donei'll show you nice example use case for classes--we'll store our instances in shelve object-oriented databaseto make them permanent that wayyou can use this code as template for fleshing out full-blown personal database written entirely in python besides actual utilitythoughour aim here is also educationalthis provides tutorial on object-oriented programming in python oftenpeople grasp the last class syntax on paperbut have trouble seeing how to get started when confronted with having to code new class from scratch toward this endwe'll take it one step at time hereto help you learn the basicswe'll build up the classes graduallyso you can see how their features come together in complete programs in the endour classes will still be relatively small in terms of codebut they will demonstrate all of the main ideas in python' oop model despite its syntax detailspython' class system really is largely just matter of searching for an attribute in tree of objectsalong with special first argument for functions