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http://www.artima.com/weblogs/viewpost.jsp?thread=240808

decorators i: introduction to python decorators

'''Created on Aug 21, 2013

@author: hailiang
'''
class myDecorator(object):
    
    def __init__(self, f):
        print "1:inside myDecorator.__init__()"
        self.f = f  # Prove that function definition has completed
 
    def __call__(self, args=None):
        print "3:inside myDecorator.__call__()"
        self.f(args)
 
@myDecorator
def aFunction(args=None):
    print "4:inside aFunction()"
    print args
 
print "2:Finished decorating aFunction()"
 
aFunction()
print "another call"
aFunction(args="I have value")