PyPy 5.0 發布，Python 解釋器

PyPy 5.0 發布了，PyPy 是用Python實現的Python解釋器。

PyPy是，Python開發者為了更好的Hack Python創建的項目。此外，PyPy比CPython是更加靈活，易于使用和試驗，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。 該項目的目標是，讓PyPy比C實現的Python更為容易的適應各個項目和方便裁剪。

改進記錄：

新特性

• Support embedding PyPy in a C-program via cffi and static callbacks in cffi.
  This deprecates the old method of embedding PyPy

• Refactor vmprof to work cross-operating-system, deprecate using buggy
  libunwind on Linux platforms. Vmprof even works on Windows now.

• Support more of the C-API type slots, like tp_getattro, and fix C-API
  macros, functions, and structs such as _PyLong_FromByteArray(),
  PyString_GET_SIZE, f_locals in PyFrameObject, Py_NAN, co_filename in
  PyCodeObject

• Use a more stable approach for allocating PyObjects in cpyext. (see
  blog post). Once the PyObject corresponding to a PyPy object is created,
  it stays around at the same location until the death of the PyPy object.
  Done with a little bit of custom GC support.  It allows us to kill the
  notion of “borrowing” inside cpyext, reduces 4 dictionaries down to 1, and
  significantly simplifies the whole approach (which is why it is a new
  feature while technically a refactoring) and allows PyPy to support the
  populart lxml module (as of the next release) with no PyPy specific
  patches needed

• Make the default filesystem encoding ASCII, like CPython

• Use hypothesis in test creation, which is great for randomizing tests

Bug 修復

• Backport always using os.urandom for uuid4 from cpython and fix the JIT as well
  (issue #2202)

• More completely support datetime, optimize timedelta creation

• Fix for issue #2185 which caused an inconsistent list of operations to be
  generated by the unroller, appeared in a complicated DJango app

• Fix an elusive issue with stacklets on shadowstack which showed up when
  forgetting stacklets without resuming them

• Fix entrypoint() which now acquires the GIL

• Fix direct_ffi_call() so failure does not bail out before setting CALL_MAY_FORCE

• Fix (de)pickling long values by simplifying the implementation

• Fix RPython rthread so that objects stored as threadlocal do not force minor
  GC collection and are kept alive automatically. This improves perfomance of
  short-running Python callbacks and prevents resetting such object between
  calls

• Support floats as parameters to itertools.isslice()

• Check for the existence of CODESET, ignoring it should have prevented PyPy
  from working on FreeBSD

• Fix for corner case (likely shown by Krakatau) for consecutive guards with
  interdependencies

• Fix applevel bare class method comparisons which should fix pretty printing
  in IPython

• Issues reported with our previous release were resolved after reports from users on our issue tracker at https://bitbucket.org/pypy/pypy/issues or on IRC at #pypy

詳細請看：http://morepypy.blogspot.com/2016/03/pypy-50-released.html

下載地址：http://pypy.org/download.htm

來自： http://www.oschina.net//news/71415/pypy-5-0