def full_1d(length, fill_value, dtype, ctx):
    """Create a 1D tensor full of the fill_value.

    Parameters
    ----------
    shape : int
        The length of the vector.
    fill_value : int
        The filled value.
    dtype : data type
        It should be one of the values in the data type dict.
    ctx : context
        The device of the result tensor.

    Returns
    -------
    Tensor
        A result 1D tensor
    """
    pass
