Function Interfaces and Callback-Based Code : Interface : Class PYTHON TUTORIALS

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Function Interfaces and Callback-Based Code


class Callback:
    def __init__(self, color):            
        self.color = color
    def __call__(self):                   
        print 'turn', self.color

cb1 = Callback('blue')                    
cb2 = Callback('green')

cb1(  )                                   
cb2(  )                                   


cb3 = (lambda color='red': 'turn ' + color) 
print cb3(  )