code: def get_symbol_idx_for_list(self, l):
      r = []
      for i in range(len(l)):
          r.append(self.get_symbol_idx(l[i]))
      return r
  
imports: from operator import itemgetter
  import numpy
label_desc: Use image node_id 7 for calling the Vocab obj's underlying member method code with example usage: obj.get_symbol_idx_for_list(l) and returns: r