newbie class-building question

[jrpfinch]

I am constructing a simple class to make sure I understand how classes
work in Python (see below this paragraph).

It works as expected, except the __add__ redefinition.  I get the
following in the Python interpreter:

>>> a=myListSub()
>>> a
[]
>>> a+[5]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'str' object is not callable
>>>

Please could you let me know where I am going wrong.  I have hacked
around with the code and tried googling this error message but am
having difficulty finding the source of the problem.

Many thanks

Jon

class myList:
    def __init__ (self,value=[]):
        self.wrapped=[]
        for x in value :
            self.wrapped.append(x)
    def __repr__ (self):
        return `self.wrapped`
    def __getattr__ (self,attrib):
        return getattr(self.wrapped,attrib,'attribute not found')
    def __len__ (self):
        return len(self.wrapped)
    def __getitem__ (self,k):
        return self.wrapped[k]
    def __add__(self,other):
        return self.wrapped+other

class myListSub(myList):
    classCounter=0
    def __init__ (self,value=[]):
        self.instanceCounter=0
        myList.__init__(self,value)
    def __add__(self,other):
        myListSub.classCounter=myListSub.classCounter+1
        self.instanceCounter=self.instanceCounter+1
        myList.__add__(self,other)
    def getCounters (self):
        return "classCounter=%s instanceCounter=%s" %
(myListSub.classCounter,self.classCounter)