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OOP and Inheritance

class Employee:     def __init__(self, name, salary=0):         self.name   = name         self.salary = salary     def giveRaise(self, percent):         self.salary = self.salary + (self.salary * percent)     def work(self):         print self.name, "does stuff"     def __repr__(self):         return "<Employee: name=%s, salary=%s>" % (self.name, self.salary) class Developer(Employee):     def __init__(self, name):         Employee.__init__(self, name, 50000)     def work(self):         print self.name, "makes food" class Server(Employee):     def __init__(self, name):         Employee.__init__(self, name, 40000)     def work(self):         print self.name, "interfaces with customer" class Tester(Developer):     def __init__(self, name):         Developer.__init__(self, name)     def work(self):         print self.name, "makes pizza" bob = Tester('bob')        print bob                     # Run inherited __repr__ bob.work(  )                  # Run type-specific action bob.giveRaise(0.20)           # Give bob a 20% raise print bob; print for klass in Employee, Developer, Server, Tester:     obj = klass(klass.__name__)     obj.work(  )