how can a wrapper be a method of the class python

Real Raccoon answered on January 27, 2023 Popularity 7/10 Helpfulness 1/10

answer how can a wrapper be a method of the class python

how can a wrapper be a method of the class python

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class MetaClass(type):
    @staticmethod
    def wrap(run):
        """Return a wrapped instance method"""
        def outer(self):
            print "PRE",
            return_value = run(self)
            print "POST"
            return return_value
        return outer
    def __new__(cls, name, bases, attrs):
        """If the class has a 'run' method, wrap it"""
        if 'run' in attrs:
            attrs['run'] = cls.wrap(attrs['run'])
        return super(MetaClass, cls).__new__(cls, name, bases, attrs)

class MyClass(object):
    """Use MetaClass to make this class"""
    __metaclass__ = MetaClass
    def run(self): print 'RUN',

myinstance = MyClass()

# Prints PRE RUN POST
myinstance.run()

Popularity 7/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: class python wrapper

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