import ctypes
class Array:
    def __init__(self,size):
        assert size > 0, "Array size must be > 0"
        self._size = size
        PyArrayType = ctypes.py_object * size
        self._elements = PyArrayType()
        self.clear( None )
    def __len__( self ):
        return self._size
    def __getitem__( self, index ):
        assert index >= 0 and index < len(self), "Array subscript out of range"
        return self._elements[ index ]
    def __setitem__( self, index, value ):
        assert index >= 0 and index < len(self), "Array subscript out of range"
        self._elements[ index ] = value
    def clear( self, value ):
        for i in range( len(self) ) :
            self._elements[i] = value
    def __iter__( self ):
        return _ArrayIterator( self._elements )
class _ArrayIterator:
    def __init__( self, theArray ):
        self._arrayRef = theArray
        self._curNdx = 0
    def __iter__( self ):
        return self
    def __next__( self ):
        if self._curNdx < len( self._arrayRef ) :
            entry = self._arrayRef[ self._curNdx ]
            self._curNdx += 1
            return entry
        else :
            raise StopIteration