exercises write some object-oriented code the goal is to use the principles and syntax you learned in this to ensure you can use itinstead of just reading about it if you've been working on python projectgo back over it and see if there are some objects you can create and add properties or methods to if it' largetry dividing it into few modules or even packages and play with the syntax if you don' have such projecttry starting new one it doesn' have to be something you intend to finishjust stub out some basic design parts you don' need to fully implement everythingoften just print("this method will do something"is all you need to get the overall design in place this is called topdown designin which you work out the different interactions and describe how they should work before actually implementing what they do the conversebottomup designimplements details first and then ties them all together both patterns are useful at different timesbut for understanding object-oriented principlesa top-down workflow is more suitable if you're having trouble coming up with ideastry writing to-do application (hintit would be similar to the design of the notebook applicationbut with extra date management methods it can keep track of things you want to do each dayand allow you to mark them as completed nowtry designing bigger project it doesn' have to actually do anythingbut make sure you experiment with the package and module importing syntax add some functions in various modules and try importing them from other modules and packages use relative and absolute imports see the differenceand try to imagine scenarios where you would want to use each one summary in this we learned how simple it is to create classes and assign properties and methods in python unlike many languagespython differentiates between constructor and an initializer it has relaxed attitude toward access control there are many different levels of scopeincluding packagesmodulesclassesand functions we understood the difference between relative and absolute importsand how to manage third-party packages that don' come with python in the next we'll learn how to share implementation using inheritance