class_docstr: This class implements a dummy wrapper to fix a bug in the Python
  standard library for string formatting.
  
  See http://bugs.python.org/issue13598 for information about why
  this is necessary.
class_docstr_tok: ["This","class","implements","a","dummy","wrapper","to","fix","a","bug","in","the","Python","standard","library","for","string","formatting",".","See","http",":","\/\/bugs.python.org\/issue13598","for","information","about","why","this","is","necessary","."]
code: def __getitem__(self, key):
      if key == "":
          idx = self._last_index
          self._last_index += 1
          try:
              return self._args[idx]
          except LookupError:
              pass
          key = str(idx)
      return self._kwargs[key]
  
imports: import re
  import string
  from ._compat import int_types
  from ._compat import iteritems
  from ._compat import Mapping
  from ._compat import PY2
  from ._compat import string_types
  from ._compat import text_type
  from ._compat import unichr
label_desc: Use image node_id 2 for calling the _MagicFormatMapping obj's underlying member method code with example usage: obj.__getitem__(key) and returns: self, self