from gensim import utils

def save2gensim(fname, word2vec_dict):
  vectors = list(word2vec_dict.values())
  vector_size = vectors[0].shape[0]
  total_vec = len(vectors)
  with utils.smart_open(fname, 'wb') as fout:
    fout.write(utils.to_utf8("%s %s\n" % (total_vec, vector_size)))
    # store in sorted order: most frequent words at the top
    for word, vector in word2vec_dict.items():
      fout.write(utils.to_utf8("%s %s\n" % (word, ' '.join(repr(val) for val in vector))))