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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 cast_conditionally(data: mx.sym.Symbol, dtype: str) -> mx.sym.Symbol: """ Workaround until no-op cast will be fixed in MXNet codebase. Creates cast symbol only if dtype is different from default one, i.e. float32. :param data: Input symbol. :param dtype: Target dtype. :return: Cast symbol or just data symbol. """

    if dtype != C.DTYPE_FP32:
        return mx.sym.cast(data=data, dtype=dtype)
    return data