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| # Online Python compiler (interpreter) to run Python online. | |
| # Write Python 3 code in this online editor and run it. | |
| class Duck(object): | |
| # Class attributes definition | |
| def __init__(self): | |
| # Instance attributes definition | |
| self.fly_behavior = None | |
| pass # lots of stuff - but missing something | |
| def setFlyBehavior(self, new_fly_behavior): | |
| self.fly_behavior = new_fly_behavior | |
| def performFly(self): | |
| self.fly_behavior.fly() | |
| pass | |
| # ------------------------------------------ | |
| class FlyBehavior(object): | |
| def fly(self): | |
| print("FlyBehavior.fly") | |
| pass # one implementation | |
| class FlyWithWings(FlyBehavior): | |
| def fly(self): | |
| print("FlyWithWings.fly") | |
| pass | |
| class FlyNoWay(FlyBehavior): | |
| def fly(self): | |
| print("FlyNoWay.Nofly") | |
| pass | |
| # ------------------------------------------ | |
| class SpecificDuck(Duck): | |
| def __init__(self): | |
| print("Specific duck") | |
| self.fly_behavior = FlyWithWings() | |
| pass | |
| class AnotherSpecificDuck(Duck): | |
| def __init__(self): | |
| print("Another Spec. duck") | |
| self.fly_behavior = FlyNoWay() | |
| pass | |
| # ------------------------------------------ | |
| duck = SpecificDuck() | |
| duck.performFly() | |
| print("--------") | |
| duck2 = AnotherSpecificDuck() | |
| duck2.performFly() | |
| duck2.setFlyBehavior(FlyWithWings()) | |
| duck2.performFly() |
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