def variable_on_cpu(name, shape, initializer):
    r"""
    Next we concern ourselves with graph creation.
    However, before we do so we must introduce a utility function ``variable_on_cpu()``
    used to create a variable in CPU memory.
    """
    # Use the /cpu:0 device for scoped operations
    with tf.device(Config.cpu_device):
        # Create or get apropos variable
        var = tf.get_variable(name=name, shape=shape, initializer=initializer)
    return var