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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 _dims2shape(*dims):
 """Convert input dimensions to a shape."""

    if not dims:
        raise ValueError("expected at least one dimension spec")
    shape = list()
    for dim in dims:
        if isinstance(dim, int):
            dim = (0, dim)
        if isinstance(dim, tuple) and len(dim) == 2:
            if dim[0] < 0:
                raise ValueError("expected low dimension to be >= 0")
            if dim[1] < 0:
                raise ValueError("expected high dimension to be >= 0")
            if dim[0] > dim[1]:
                raise ValueError("expected low <= high dimensions")
            start, stop = dim
        else:
            raise TypeError("expected dimension to be int or (int, int)")
        shape.append((start, stop))
    return tuple(shape)