CODE EXAMPLE FOR PYTHON

duck typing in python

class Duck(object): 
   def quack(self): 
      print "Quack" 
 
class Mallard(object): 
    def quack(self): 
        print "Quack Quack" 
 
def shoot(bird): 
    bird.quack() 
 
for target in [Duck(), Mallard()]: 
   shoot(target)