class_docstr: DNAEncoder for delimiter separated subsequences.
  
  Uses ',' as default delimiter.
class_docstr_tok: ["DNAEncoder","for","delimiter","separated","subsequences",".","Uses","'",",","'","as","default","delimiter","."]
code: def encode(self, s):
      delimited_string = s
      ids = []
      for part in delimited_string.split(self.delimiter):
          ids.extend(super(DelimitedDNAEncoder, self).encode(part))
          ids.append(self._tokens_to_ids[self._delimiter_key])
      return ids[:-1]
  
file_path: tensor2tensor/tensor2tensor/data_generators/dna_encoder.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import itertools
  from six.moves import range
  from tensor2tensor.data_generators import text_encoder
label_desc: Use image node_id 4 for calling the DelimitedDNAEncoder obj's underlying member method code with example usage: obj.encode(s) and returns: ids