docstr: Yield `MatchVariable` instances.
docstr_tok: ["Yield","`","MatchVariable","`","instances","."]
code: def __iter__(self):
      """
      Yield `MatchVariable` instances.
      """
      for varname, value, slice in self._tuples:
          yield MatchVariable(varname, value, slice)
  
imports: from __future__ import unicode_literals
  import re
  from six.moves import range
  from .regex_parser import Any, Sequence, Regex, Variable, Repeat, Lookahead
  from .regex_parser import parse_regex, tokenize_regex
label_desc: Use image node_id 6 for calling the Variables obj's underlying member method code with example usage: obj.__iter__() without return types