class_docstr: Vinegre cipher.
class_docstr_tok: ["Vinegre","cipher","."]
code: def num_symbols(self):
      return 5
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from collections import deque
  import numpy
  from tensor2tensor.data_generators import algorithmic
  from tensor2tensor.utils import registry
label_desc: Use image node_id 1 for calling the AlgorithmicCipherVigenere5 obj's underlying member method code with example usage: obj.num_symbols() and returns: int