code: def maybe_append_oov_vectors(embeddings, num_oov_buckets):
    
    num_embeddings = np.shape(embeddings)[0]
    embedding_dim = np.shape(embeddings)[1]
    embeddings.resize(
        [num_embeddings + num_oov_buckets, embedding_dim], refcheck=False)
docs: Adds zero vectors for oov buckets if num_oov_buckets > 0.
  
    Since we are assigning zero vectors, adding more that one oov bucket is only
    meaningful if we perform fine-tuning.
  
    Args:
      embeddings: Embeddings to extend.
      num_oov_buckets: Number of OOV buckets in the extended embedding.