Some new 3.0 whatsnew items, written for GHOP by Andreas Freund.
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@ -182,19 +182,31 @@ Strings and Bytes
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PEP 3101: A New Approach to String Formatting
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=============================================
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XXX
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.. XXX expand this
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* A new system for built-in string formatting operations replaces
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the ``%`` string formatting operator.
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PEP 3106: Revamping ``.keys()``, ``.items()`` and ``.values()``
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===============================================================
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PEP 3106: Revamping dict ``.keys()``, ``.items()`` and ``.values()``
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====================================================================
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XXX
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.. XXX expand this
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* The ``.iterkeys()``, ``.itervalues()`` and ``.iteritems()`` methods
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have been removed.
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* ``.keys()``, ``.values()`` and ``.items()`` return objects with set
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behavior that reference the underlying dict.
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PEP 3107: Function Annotations
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==============================
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XXX
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.. XXX expand this
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* A standardized way of annotating a function's parameters and return
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values.
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Exception Stuff
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@ -216,6 +228,11 @@ Exception Stuff
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* PEP 3134: Exception chaining. (The ``__context__`` feature from the
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PEP hasn't been implemented yet in 3.0a1.)
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* A few exception messages are improved when Windows fails to load an
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extension module. For example, ``error code 193`` is now ``%1 is not
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a valid Win32 application``. Strings now deal with non-English
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locales.
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New Class and Metaclass Stuff
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=============================
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@ -242,8 +259,13 @@ language and built-in functions.
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* Removed ``<>`` (use ``!=`` instead).
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* ``!=`` now returns the opposite of ``==``, unless ``==`` returns
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``NotImplemented``.
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* ``as`` and ``with`` are keywords.
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* ``True``, ``False``, and ``None`` are keywords.
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* PEP 237: ``long`` renamed to ``int``. That is, there is only one
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built-in integral type, named ``int``; but it behaves like the old
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``long`` type, with the exception that the literal suffix ``L`` is
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@ -312,6 +334,23 @@ language and built-in functions.
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* ``exec`` is now a function.
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* There is a new free format floating point representation, which is
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based on "Floating-Point Printer Sample Code", by Robert G. Burger.
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``repr(11./5)`` now returns ``2.2`` instead of ``2.2000000000000002``.
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* The ``__oct__()`` and ``__hex__()`` special methods are removed --
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``oct()`` and ``hex()`` use ``__index__()`` now to convert the
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argument to an integer.
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* There is now a ``bin()`` builtin function.
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* Support is removed for ``__members__`` and ``__methods__``.
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* ``nb_nonzero`` is now ``nb_bool`` and ``__nonzero__`` is now
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``__bool__``.
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* Removed ``sys.maxint``. Use ``sys.maxsize``.
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.. ======================================================================
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@ -341,6 +380,18 @@ through the Subversion logs for all the details.
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* The ``cPickle`` module is gone. Use ``pickle`` instead. Eventually
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we'll have a transparent accelerator module.
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* The ``imageop`` module is gone.
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* The ``audiodev``, ``Bastion``, ``bsddb185``, ``exceptions``,
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``linuxaudiodev``, ``md5``, ``MimeWriter``, ``mimify``, ``popen2``,
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``rexec``, ``sets``, ``sha``, ``stringold``, ``strop``, ``sunaudiodev``,
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``timing``, and ``xmllib`` modules are gone.
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* The ``new`` module is gone.
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* The methods ``os.tmpnam()``, ``os.tempnam()`` and ``os.tmpfile()`` have
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been removed in favor of the ``tempfile`` module.
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.. ======================================================================
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.. whole new modules get described in subsections here
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@ -358,6 +409,15 @@ Changes to Python's build process and to the C API include:
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* PEP 3123: Making ``PyObject_HEAD`` conform to standard C.
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* No more C API support for restricted execution.
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* ``PyNumber_Coerce()``, ``PyNumber_CoerceEx()``, ``PyMember_Get``,
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and ``PyMember_Set`` C APIs are removed.
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* New C API ``PyImport_ImportModuleNoBlock()``, works like
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``PyImport_ImportModule()`` but won't block on the import lock (returning
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an error instead).
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.. ======================================================================
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@ -366,6 +426,7 @@ Port-Specific Changes
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Platform-specific changes go here.
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.. ======================================================================
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