python code
_5 classes and a main class using inheritance ,polymorphism ,composition ,aggregation, interface, encapsulation
-the classes are person, Tickets, Travelers, employees, Destination ,travel classes
-make sure to include error exceptions: Value error ,IO error
-include list and append , and a mixin class, abstract and concrete classes
also include **kwargs and *args to avoid code errors, double inheritance and put them in a file
i was trying to make it as perfect as a code can be
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