Our product shop team can be defined by the four classes.
The most general class, Employee, provides common behavior such as bumping up salaries (giveRaise) and printing (__repr__).
There are two kinds of employees, and so two subclasses of Employee-Chef and Server.
Both override the inherited work method to print more specific messages.
Our product robot is modeled by ProductRobot which is a kind of Chef
In OOP terms, we call these relationships "is-a" links: a robot is a chef, which is an employee.
from __future__ import print_function class Employee: # from ww w.j ava 2s . co m 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 Chef(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 ProductRobot(Chef): def __init__(self, name): Chef.__init__(self, name) def work(self): print(self.name, "makes product") if __name__ == "__main__": bob = ProductRobot('bob') # Make a robot named 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, Chef, Server, ProductRobot: obj = klass(klass.__name__) obj.work()