def time_this(original_function):
    print("decorating")
    def new_function(*args, **kwargs):
        import datetime
        before = datetime.datetime.now
        x = original_function(*args, **kwargs)
        after = datetime.datetime.now
        print("Elapsed time {0}".format(after-before))
        return x
    return new_function
def time_all_class_methods(Cls):
    class NewCls(object):
        def __init__(self,*args,**kwargs):
            self.oInstance = Cls(*args,**kwargs)
        def __getattribute__(self,s):
            try:    
                x = super(NewCls,self).__getattribute__(s)
            except AttributeError:      
                pass
            else:
                return x
            x = self.oInstance.__getattribute__(s)
            if type(x) == type(self.__init__): # it is an instance method
                return time_this(x)                 # this is equivalent of just decorating the method with time_this
            else:
                return x
            return NewCls
#@time_all_class_methods
class Foo(object):
    def a(self):
        print "entering a"
        import time
        time.sleep(3)
        print "exiting a"
Foo = time_all_class_methods(Foo)
oF = Foo
oF.a()

================
Error Message::
File "/home/psychognite/wingProjects/limboCls.py", line 37, in <module>
  oF.a()

AttributeError: 'NoneType' object has no attribute 'a'