code: def similarity(v1, v2):
      n1 = np.linalg.norm(v1)
      n2 = np.linalg.norm(v2)
      return np.dot(v1, v2) / n1 / n2
  
file_path: fastText/eval.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import numpy
  from scipy import stats
  import os
  import math
  import argparse
label_desc: Use image node_id 2 for calling a global function with example usage: similarity(v1, v2) and returns: unknown