__setitem__ without position

[Kevin Anthony]

I have a class that contains a list of items
I can set items using __setitem__ but if i want to set the while list, i
changes the variable from a myclass to a list.  How can i accomblish this
Example
>>>C = myclass()
>>>C[0] = 57
>>>type(C)
myclass
>>> C = [57,58,59,60]
>>>type(C)
list
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