# Package org.python.modules._collections

- Class Summary
  Class | Description
  --- | ---
  Collections | Collections - This module adds the ability to use high performance data structures
  PyDefaultDict | PyDefaultDict - This is a subclass of the builtin dict(PyDictionary) class.
  PyDefaultDictDerived |
  PyDeque | PyDeque - This class implements the functionalities of Deque data structure.
  PyDequeDerived |

Jython homepage