docs: def retrieve_net(wrnt_path):
      '''Rerieves a dumped Network and generates WordNet instance.
  
      @Args:
      --
      wrnt_path : file_path to the '.wrnt' network dumped file.
  
      @returns:
      --
      word_net : dict of Word() entities generated from the input file.
      '''
      # Exception Handling of  wrong format.
      if wrnt_path[-4:] != __WRNT_FORMAT: raise Exception(__WRNG_FORMAT_MSG)
      
      file = open(wrnt_path,'rb')
      # retrieving a network  from .wrnt file.
      network = pickle.load(file)
      file.close()
      # Generating Word() instance dictionary from retrieved network.
      word_net = {}
      for n in network:
          word_net[n[0]] = Word(n[0],None,set([network[i][0] for i in n[1:]]))
      # deleting useless resources, for efficient memory usage.
      del network
      return word_net