code: def __getitem__(self, key):
      return self.get(key)
  
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 5 for calling the Variables obj's underlying member method code with example usage: obj.__getitem__(key) and returns: self