def __init__(self, name, dtype, dims):
        self.name = name
        self.dtype = dtype
        self.dims = dims
        self.iotype = 0
        self.used_count = 0
        self.index = Operand.index
        Operand.index = Operand.index + 1
        self.iotype2str = {Operand.IOTYPE_INPUT: 'in', Operand.IOTYPE_OUTPUT: 'out', Operand.IOTYPE_INTERMEDIATE: 'inout'}
        self.dtype2str = {Operand.DTYPE_FLOAT: 'DT_FLOAT', Operand.DTYPE_UINT8: 'DT_UINT8'}