parameters: (self)
return_statement: return reversed(tuple(self._queue))
docstring: Iterate over all keys in the cache dict, ordered by
          the most recent usage.
docstring_summary: Iterate over all keys in the cache dict, ordered by
          the most recent usage.
docstring_tokens: Iterate over all keys in the cache dict ordered by the most recent usage .
function: def iterkeys(self):
          """Iterate over all keys in the cache dict, ordered by
          the most recent usage.
          """
          return reversed(tuple(self._queue))
function_tokens: def iterkeys ( self ) : return reversed ( tuple ( self . _queue ) )