code: def test_no_header(self):
      randkv = KeyedVectors(vector_size=100)
      count = 20
      keys = [str(i) for i in range(count)]
      weights = [
          pseudorandom_weak_vector(randkv.vector_size)
          for _ in range(count)
      ]
      randkv.add_vectors(keys, weights)
      tmpfiletxt = gensim.test.utils.get_tmpfile("tmp_kv.txt")
      randkv.save_word2vec_format(
          tmpfiletxt, binary=False, write_header=False
      )
      reloadtxtkv = KeyedVectors.load_word2vec_format(
          tmpfiletxt, binary=False, no_header=True
      )
      self.assertEqual(randkv.index_to_key, reloadtxtkv.index_to_key)
      self.assertTrue((randkv.vectors == reloadtxtkv.vectors).all())
  
imports: import functools
  import logging
  import unittest
  import numpy
  from gensim.models.keyedvectors import KeyedVectors, REAL, pseudorandom_weak_vector
  from gensim.test.utils import datapath
  import gensim.models.keyedvectors
label_desc: Use image node_id 29 for calling the TestKeyedVectors obj's underlying member method code with example usage: obj.test_no_header() without return types