def shape_list(x, out_type=tf.int32):
    """Deal with dynamic shape in tensorflow cleanly."""
    static = x.shape.as_list()
    dynamic = tf.shape(x, out_type=out_type)
    return [dynamic[i] if s is None else s for i, s in enumerate(static)]
Deal with dynamic shape in tensorflow cleanly.
tensorflow_asr/utils/shape_util.py