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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def tensor_layout(self, arg):
 """Compute TensorLayout for a Tensor or a Shape. Args: arg: Tensor or Shape. Returns: TensorLayout. """

    if isinstance(arg, Tensor):
      arg = arg.shape
    return self.layout_rules.tensor_layout(arg, self.shape)