PyPy 2.3.1 釋出了，主要改進包括：
The built-in struct module was renamed to _struct, solving issues with IDLE and other modules
Support for compilation with gcc-4.9
A CFFI-based version of the gdbm module is now included in our binary bundle
Many issues were resolved since the 2.3 release on May 8
完整的改進記錄請看發行說明。
PyPy 是用Python實現的Python直譯器。
PyPy是，Python開發者為了更好的Hack Python建立的專案。此外，PyPy比CPython是更加靈活，易於使用和試驗，以制定具體的功能在不同情況的實現方法，可以很容易實施。 該專案的目標是，讓PyPy比C實現的Python更為容易的適應各個專案和方便裁剪。