summary test your knowledgequiz test your knowledgeanswers test your knowledgepart exercises part vi classes and oop oopthe big picture why use classesoop from , feet attribute inheritance search classes and instances method calls coding class trees operator overloading oop is about code reuse summary test your knowledgequiz test your knowledgeanswers class coding basics classes generate multiple instance objects class objects provide default behavior instance objects are concrete items first example classes are customized by inheritance second example classes are attributes in modules classes can intercept python operators third example why use operator overloadingthe world' simplest python class records revisitedclasses versus dictionaries summary test your knowledgequiz test your knowledgeanswers more realistic example step making instances coding constructors testing as you go xx table of contents