human
Solve the following python programming problem given the following code:
@ contextmanager 
def substate_context(substate_name) : 
    'Replaces global state with sub section of real state within the context
    ' 
    original_getitem = State.__getitem__ 
    original_setitem = State.__setitem__ 
    original_delitem = State.__delitem__ 
    original_iter = State.__iter__ 
    def getsubitem(self, key) : 
        'Get an item
        ' 
        if (not key.startswith ('__')) : 
            key = ((substate_name + State.SECTION_SEPARATOR) + key) 
State.__setitem__ = original_setitem 
        try : 
            value = original_getitem (self, key) 
except Exception as err : 
            raise err 
finally : 
            State.__setitem__ = setsubitem 
return value 
def setsubitem(self, key, value) : 
        'Set an item
        ' 
        if (not key.startswith ('__')) : 
            key = ((substate_name + State.SECTION_SEPARATOR) + key) 
original_setitem (self, key, value) 
def delsubitem(self, key) : 
        'Delete an item
        ' 
        if (not key.startswith ('__')) : 
            key = ((substate_name + State.SECTION_SEPARATOR) + key) 
original_delitem (self, key) 
def subiter(self) : 
        'Iterate
        ' 
        return original_getitem (self, substate_name).__iter__ () 
State.__getitem__ = getsubitem 
    State.__setitem__ = setsubitem 
    State.__delitem__ = delsubitem 
    State.__iter__ = subiter 
    try : 
        (yield) 
except Exception as err : 
        raise err 
finally : 
        State.__getitem__ = original_getitem 
        State.__setitem__ = original_setitem 
        State.__delitem__ = original_delitem 
        State.__iter__ = getsubitem 

    
    

    Fix the buggy line: State.__iter__ = getsubitem
assistant
#Here is Python program to fix the buggy line: State.

State.__iter__ = original_iter