| +++++++++++ |
| Python News |
| +++++++++++ |
| |
| (editors: check NEWS.help for information about editing NEWS using ReST.) |
| |
| What's new in Python 3.0b3? |
| =========================== |
| |
| *Release date: XX-XXX-2008* |
| |
| Core and Builtins |
| ----------------- |
| |
| - Issue #1819: function calls with several named parameters are now on |
| average 35% faster (as measured by pybench). |
| |
| Library |
| ------- |
| |
| - Issue #3394: zipfile.writestr sets external attributes when passed a |
| file name rather than a ZipInfo instance, so files are extracted with |
| mode 0600 rather than 000 under Unix. |
| |
| - Issue #2523: Fix quadratic behaviour when read()ing a binary file without |
| asking for a specific length. |
| |
| |
| What's new in Python 3.0b2? |
| =========================== |
| |
| *Release date: 17-Jul-2008* |
| |
| Core and Builtins |
| ----------------- |
| |
| - Issue #3008: the float type has a new instance method 'float.hex' |
| and a new class method 'float.fromhex' to convert floating-point |
| numbers to and from hexadecimal strings, respectively. |
| |
| - Issue #3083: Add alternate (#) formatting for bin, oct, hex output |
| for str.format(). This adds the prefix 0b, 0o, or 0x, respectively. |
| |
| - Issue #3280: like chr(), the "%c" format now accepts unicode code points |
| beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On |
| "narrow Unicode" builds, the result is a string of 2 code units, forming a |
| UTF-16 surrogate pair. |
| |
| - Issue #3282: str.isprintable() should return False for undefined |
| Unicode characters. |
| |
| - Issue #3236: Return small longs from PyLong_FromString. |
| |
| - Exception tracebacks now support exception chaining. |
| |
| Library |
| ------- |
| |
| - Removed the sunaudio module. Use sunau instead. |
| |
| - Removed "ast" function aliases from the parser module. |
| |
| - Issue #3313: Fixed a crash when a failed dlopen() call does not set |
| a valid dlerror() message. |
| |
| - Issue #3258: Fixed a crash when a ctypes POINTER type to an |
| incomplete structure was created. |
| |
| - Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the |
| argument now must be a bytes object in any case. |
| |
| - Issue #3145: help("modules whatever") failed when trying to load the source |
| code of every single module of the standard library, including invalid files |
| used in the test suite. |
| |
| - The gettext library now consistently uses Unicode strings for message ids |
| and message strings, and ``ugettext()`` and the like don't exist anymore. |
| |
| - The traceback module has been expanded to handle chained exceptions. |
| |
| C API |
| ----- |
| |
| - Issue #3247: the function Py_FindMethod was removed. Modern types should |
| use the tp_methods slot instead. |
| |
| Tools/Demos |
| ----------- |
| |
| - The Mac/Demos directory has been removed. |
| |
| - All of the Mac scripts have been removed (including BuildApplet.py). |
| |
| |
| What's new in Python 3.0b1? |
| =========================== |
| |
| *Release date: 18-Jun-2008* |
| |
| Core and Builtins |
| ----------------- |
| |
| - Issue #3211: warnings.warn_explicit() did not guard against its 'registry' |
| argument being anything other than a dict or None. Also fixed a bug in error |
| handling when 'message' and 'category' were both set to None, triggering a |
| bus error. |
| |
| - Issue #3100: Corrected a crash on deallocation of a subclassed weakref which |
| holds the last (strong) reference to its referent. |
| |
| - Issue #2630: implement PEP 3138. repr() now returns printable |
| Unicode characters unescaped, to get an ASCII-only representation |
| of an object use ascii(). |
| |
| - Issue #1342: On windows, Python could not start when installed in a |
| directory with non-ascii characters. |
| |
| - Implement PEP 3121: new module initialization and finalization API. |
| |
| - Removed the already-defunct ``-t`` option. |
| |
| - Issue #2957: Corrected a ValueError "recursion limit exceeded", when |
| unmarshalling many code objects, which happens when importing a |
| large .pyc file (~1000 functions). |
| |
| - Issue #2963: fix merging oversight that disabled method cache for |
| all types. |
| |
| - Issue #2964: fix a missing INCREF in instancemethod_descr_get. |
| |
| - Issue #2895: Don't crash when given bytes objects as keyword names. |
| |
| - Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s" |
| code now allows any unicode string and returns a utf-8 encoded |
| buffer, just like the "s#" code already does. The "z" code was |
| corrected as well. |
| |
| - Issue #2863: generators now have a ``gen.__name__`` attribute that |
| equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals |
| ``func.func_code.co_name``. The repr() of a generator now also |
| contains this name. |
| |
| - Issue #2831: enumerate() now has a ``start`` argument. |
| |
| - Issue #2801: fix bug in the float.is_integer method where a |
| ValueError was sometimes incorrectly raised. |
| |
| - The ``--with-toolbox-glue`` option (and the associated |
| pymactoolbox.h) have been removed. |
| |
| - Issue #2196: hasattr() now lets exceptions which do not inherit |
| Exception (KeyboardInterrupt, and SystemExit) propagate instead of |
| ignoring them. |
| |
| - #3021 Exception reraising sematics have been significantly improved. However, |
| f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python |
| code anymore. |
| |
| - Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been |
| removed. |
| |
| Extension Modules |
| ----------------- |
| |
| - Renamed ``_winreg`` module to ``winreg``. |
| |
| - Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the |
| platform. |
| |
| - Support for Windows 9x has been removed from the winsound module. |
| |
| - Issue #2870: cmathmodule.c compile error. |
| |
| Library |
| ------- |
| |
| - Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows. |
| |
| - a new ``urllib`` package was created. It consists of code from |
| ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old |
| modules have all been removed. The new package has five submodules: |
| ``urllib.parse``, ``urllib.request``, ``urllib.response``, |
| ``urllib.error``, and ``urllib.robotparser``. The |
| ``urllib.request.urlopen()`` function uses the url opener from |
| ``urllib2``. (Note that the unittests have not been renamed for the |
| beta, but they will be renamed in the future.) |
| |
| - rfc822 has been removed in favor of the email package. |
| |
| - mimetools has been removed in favor of the email package. |
| |
| - Patch #2849: Remove use of rfc822 module from standard library. |
| |
| - Added C optimized implementation of io.StringIO. |
| |
| - The ``pickle`` module is now automatically use an optimized C |
| implementation of Pickler and Unpickler when available. The |
| ``cPickle`` module is no longer needed. |
| |
| - Removed the ``htmllib`` and ``sgmllib`` modules. |
| |
| - The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have |
| been removed from ``http.cookies``. |
| |
| - The ``commands`` module has been removed. Its getoutput() and |
| getstatusoutput() functions have been moved to the ``subprocess`` module. |
| |
| - The ``http`` package was created; it contains the old ``httplib`` |
| as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib`` |
| as ``http.cookiejar``, and the content of the three ``HTTPServer`` |
| modules as ``http.server``. |
| |
| - The ``xmlrpc`` package was created; it contains the old |
| ``xmlrpclib`` module as ``xmlrpc.client`` and the content of |
| the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules |
| as ``xmlrpc.server``. |
| |
| - The ``dbm`` package was created, containing the old modules |
| ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having |
| ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``), |
| ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``) |
| as submodules. |
| |
| - The ``repr`` module has been renamed to ``reprlib``. |
| |
| - The ``statvfs`` module has been removed. |
| |
| - Issue #1713041: fix pprint's handling of maximum depth. |
| |
| - Issue #2250: Exceptions raised during evaluation of names in |
| rlcompleter's ``Completer.complete()`` method are now caught and |
| ignored. |
| |
| - Patch #2659: Added ``break_on_hyphens`` option to textwrap's |
| ``TextWrapper`` class. |
| |
| - Issue #2487: change the semantics of math.ldexp(x, n) when n is too |
| large to fit in a C long. ldexp(x, n) now returns a zero (with |
| suitable sign) if n is large and negative; previously, it raised |
| OverflowError. |
| |
| - The ``ConfigParser`` module has been renamed to ``configparser``. |
| |
| - Issue #2865: webbrowser.open() works again in a KDE environment. |
| |
| - The ``multifile`` module has been removed. |
| |
| - The ``SocketServer`` module has been renamed to ``socketserver``. |
| |
| - Fixed the ``__all__`` setting on ``collections`` to include |
| ``UserList`` and ``UserString``. |
| |
| - The sre module has been removed. |
| |
| - The Queue module has been renamed to queue. |
| |
| - The copy_reg module has been renamed to copyreg. |
| |
| - The mhlib module has been removed. |
| |
| - The ihooks module has been removed. |
| |
| - The fpformat module has been removed. |
| |
| - The dircache module has been removed. |
| |
| - The Canvas module has been removed. |
| |
| - The Decimal module gained the magic methods __round__, __ceil__, |
| __floor__ and __trunc__, to give support for round, math.ceil, |
| math.floor and math.trunc. |
| |
| - The user module has been removed. |
| |
| - The mutex module has been removed. |
| |
| - The imputil module has been removed. |
| |
| - os.path.walk has been removed in favor of os.walk. |
| |
| - pdb gained the "until" command. |
| |
| - The test.test_support module has been renamed to test.support. |
| |
| - The threading module API was renamed to be PEP 8 complaint. |
| |
| Tools/Demos |
| ----------- |
| |
| - The bgen tool has been removed. |
| |
| Build |
| ----- |
| |
| |
| What's New in Python 3.0a5? |
| =========================== |
| |
| *Release date: 08-May-2008* |
| |
| Core and Builtins |
| ----------------- |
| |
| - Fixed misbehaviour of PyLong_FromSsize_t on systems where |
| sizeof(size_t) > sizeof(long). |
| |
| - Issue #2221: Corrected a SystemError "error return without exception |
| set", when the code executed by exec() raises an exception, and |
| sys.stdout.flush() also raises an error. |
| |
| - Bug #2565: The repr() of type objects now calls them 'class', not |
| 'type' - whether they are builtin types or not. |
| |
| - The command line processing was converted to pass Unicode strings |
| through as unmodified as possible; as a consequence, the C API |
| related to command line arguments was changed to use wchar_t. |
| |
| - All backslashes in raw strings are interpreted literally. This |
| means that '\u' and '\U' escapes are not treated specially. |
| |
| Extension Modules |
| ----------------- |
| |
| Library |
| ------- |
| |
| - ctypes objects now support the PEP3118 buffer interface. |
| |
| - Issue #2682: ctypes callback functions now longer contain a cyclic |
| reference to themselves. |
| |
| - Issue #2058: Remove the buf attribute and add __slots__ to the |
| TarInfo class in order to reduce tarfile's memory usage. |
| |
| - Bug #2606: Avoid calling .sort() on a dict_keys object. |
| |
| - The bundled libffi copy is now in sync with the recently released |
| libffi3.0.5 version, apart from some small changes to |
| Modules/_ctypes/libffi/configure.ac. |
| |
| Build |
| ----- |
| |
| - Issue #1496032: On alpha, use -mieee when gcc is the compiler. |
| |
| - "make install" is now an alias for "make altinstall", to prevent |
| accidentally overwriting a Python 2.x installation. Use "make |
| fullinstall" to force Python 3.0 to be installed as "python". |
| |
| - Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when |
| gcc is used as compiler. |
| |
| |
| What's New in Python 3.0a4? |
| =========================== |
| |
| *Release date: 02-Apr-2008* |
| |
| Core and Builtins |
| ----------------- |
| |
| - Bug #2301: Don't try decoding the source code into the original |
| encoding for syntax errors. |
| |
| Extension Modules |
| ----------------- |
| |
| - The dl module was removed, use the ctypes module instead. |
| |
| - Use wchar_t functions in _locale module. |
| |
| Library |
| ------- |
| |
| - The class distutils.commands.build_py.build_py_2to3 can be used as a |
| build_py replacement to automatically run 2to3 on modules that are |
| going to be installed. |
| |
| - A new pickle protocol (protocol 3) is added with explicit support |
| for bytes. This is the default protocol. It intentionally cannot |
| be unpickled by Python 2.x. |
| |
| - When a pickle written by Python 2.x contains an (8-bit) str |
| instance, this is now decoded to a (Unicode) str instance. The |
| encoding used to do this defaults to ASCII, but can be overridden |
| via two new keyword arguments to the Unpickler class. Previously |
| this would create bytes instances, which is usually wrong: str |
| instances are often used to pickle attribute names etc., and text is |
| more common than binary data anyway. |
| |
| - Default to ASCII as the locale.getpreferredencoding, if the POSIX |
| system doesn't support CODESET and LANG isn't set or doesn't allow |
| deduction of an encoding. |
| |
| - Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned |
| value. |
| |
| - Issue #719888: Updated tokenize to use a bytes API. generate_tokens |
| has been renamed tokenize and now works with bytes rather than |
| strings. A new detect_encoding function has been added for |
| determining source file encoding according to PEP-0263. Token |
| sequences returned by tokenize always start with an ENCODING token |
| which specifies the encoding used to decode the file. This token is |
| used to encode the output of untokenize back to bytes. |
| |
| |
| What's New in Python 3.0a3? |
| =========================== |
| |
| *Release date: 29-Feb-2008* |
| |
| Core and Builtins |
| ----------------- |
| |
| - Issue #2282: io.TextIOWrapper was not overriding seekable() from |
| io.IOBase. |
| |
| - Issue #2115: Important speedup in setting __slot__ attributes. Also |
| prevent a possible crash: an Abstract Base Class would try to access |
| a slot on a registered virtual subclass. |
| |
| - Fixed repr() and str() of complex numbers with infinity or nan as |
| real or imaginary part. |
| |
| - Clear all free list during a gc.collect() of the highest generation |
| in order to allow pymalloc to free more arenas. Python may give back |
| memory to the OS earlier. |
| |
| - Issue #2045: Fix an infinite recursion triggered when printing a |
| subclass of collections.defaultdict, if its default_factory is set |
| to a bound method. |
| |
| - Fixed a minor memory leak in dictobject.c. The content of the free |
| list was not freed on interpreter shutdown. |
| |
| - Limit free list of method and builtin function objects to 256 |
| entries each. |
| |
| - Patch #1953: Added ``sys._compact_freelists()`` and the C API |
| functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList`` |
| to compact the internal free lists of pre-allocted ints and floats. |
| |
| - Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls. |
| Python expected the return type int but the fork familie returns |
| pi_t. |
| |
| - Issue #1678380: Fix a bug that identifies 0j and -0j when they |
| appear in the same code unit. |
| |
| - Issue #2025: Added tuple.count() and tuple.index() methods to comply |
| with the collections.Sequence API. |
| |
| - Fixed multiple reinitialization of the Python interpreter. The small |
| int list in longobject.c has caused a seg fault during the third |
| finalization. |
| |
| - Issue #1973: bytes.fromhex('') raised SystemError. |
| |
| - Issue #1771: remove cmp parameter from sorted() and list.sort(). |
| |
| - Issue #1969: split and rsplit in bytearray are inconsistent. |
| |
| - map() no longer accepts None for the first argument. Use zip() |
| instead. |
| |
| - Issue #1769: Now int("- 1") is not allowed any more. |
| |
| - Object/longobject.c: long(float('nan')) raises an OverflowError |
| instead of returning 0. |
| |
| - Issue #1762972: __file__ points to the source file instead of the |
| pyc/pyo file if the py file exists. |
| |
| - Issue #1393: object_richcompare() returns NotImplemented instead of |
| False if the objects aren't equal, to give the other side a chance. |
| |
| - Issue #1692: Interpreter was not displaying location of SyntaxError. |
| |
| - Improve some exception messages when Windows fails to load an |
| extension module. Now we get for example '%1 is not a valid Win32 |
| application' instead of 'error code 193'. Also use Unicode strings |
| to deal with non-English locales. |
| |
| - Issue #1587: Added instancemethod wrapper for PyCFunctions. The |
| Python C API has gained a new type *PyInstanceMethod_Type* and the |
| functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)* |
| and *PyInstanceMethod_Function(im)*. |
| |
| - Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed |
| from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE |
| are now enough to print the corresponding list of objects considered |
| by the garbage collector. |
| |
| - Issue #1573: Improper use of the keyword-only syntax makes the |
| parser crash. |
| |
| - Issue #1564: The set implementation should special-case PyUnicode |
| instead of PyString. |
| |
| - Patch #1031213: Decode source line in SyntaxErrors back to its |
| original source encoding. |
| |
| - inspect.getsource() includes the decorators again. |
| |
| - Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a |
| mountpoint. |
| |
| - Fix utf-8-sig incremental decoder, which didn't recognise a BOM when |
| the first chunk fed to the decoder started with a BOM, but was |
| longer than 3 bytes. |
| |
| Extension Modules |
| ----------------- |
| |
| - Code for itertools ifilter(), imap(), and izip() moved to bultins |
| and renamed to filter(), map(), and zip(). Also, renamed |
| izip_longest() to zip_longest() and ifilterfalse() to filterfalse(). |
| |
| - Issue #1762972: Readded the reload() function as imp.reload(). |
| |
| - Bug #2111: mmap segfaults when trying to write a block opened with |
| PROT_READ. |
| |
| - Issue #2063: correct order of utime and stime in os.times() result |
| on Windows. |
| |
| Library |
| ------- |
| |
| - Weakref dictionaries now inherit from MutableMapping. |
| |
| - Created new UserDict class in collections module. This one inherits |
| from and complies with the MutableMapping ABC. Also, moved |
| UserString and UserList to the collections module. The |
| MutableUserString class was removed. |
| |
| - Removed UserDict.DictMixin. Replaced all its uses with |
| collections.MutableMapping. |
| |
| - Issue #1703: getpass() should flush after writing prompt. |
| |
| - Issue #1585: IDLE uses non-existent xrange() function. |
| |
| - Issue #1578: Problems in win_getpass. |
| |
| Build |
| ----- |
| |
| - Renamed --enable-unicode configure flag to --with-wide-unicode, |
| since Unicode strings can't be disabled anymore. |
| |
| C API |
| ----- |
| |
| - Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, |
| Py_TYPE and Py_REFCNT. |
| |
| - New API PyImport_ImportModuleNoBlock(), works like |
| PyImport_ImportModule() but won't block on the import lock |
| (returning an error instead). |
| |
| |
| What's New in Python 3.0a2? |
| =========================== |
| |
| *Release date: 07-Dec-2007* |
| |
| (Note: this list is incomplete.) |
| |
| Core and Builtins |
| ----------------- |
| |
| - str8 now has the same construction signature as bytes. |
| |
| - Comparisons between str and str8 now return False/True for ==/!=. |
| sqlite3 returns str8 when recreating on object from it's __conform__ |
| value. The struct module returns str8 for all string-related |
| formats. This was true before this change, but becomes more |
| apparent thanks to string comparisons always being False. |
| |
| - Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode, |
| buffer, encoding, newline)`. |
| |
| - Fixed `imp.find_module()` to obey the -*- coding: -*- header. |
| |
| - Changed `__file__` and `co_filename` to unicode. The path names are decoded |
| with `Py_FileSystemDefaultEncoding` and a new API method |
| `PyUnicode_DecodeFSDefault(char*)` was added. |
| |
| - io.open() and _fileio.FileIO have grown a new argument closefd. A |
| false value disables the closing of the file descriptor. |
| |
| - Added a new option -b to issues warnings (-bb for errors) about |
| certain operations between bytes/buffer and str like str(b'') and |
| comparison. |
| |
| - The standards streams sys.stdin, stdout and stderr may be None when |
| the when the C runtime library returns an invalid file descriptor |
| for the streams (fileno(stdin) < 0). For now this happens only for |
| Windows GUI apps and scripts started with `pythonw.exe`. |
| |
| - Added PCbuild9 directory for VS 2008. |
| |
| - Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to |
| work around a name clash with VS 2008 on Windows. |
| |
| - Unbound methods are gone for good. ClassObject.method returns an |
| ordinary function object, instance.method still returns a bound |
| method object. The API of bound methods is cleaned up, too. The |
| im_class attribute is removed and im_func + im_self are renamed to |
| __func__ and __self__. The factory PyMethod_New takes only func and |
| instance as argument. |
| |
| - intobject.h is no longer included by Python.h. The remains were |
| moved to longobject.h. It still exists to define several aliases |
| from PyInt_ to PyLong_ functions. |
| |
| - Removed sys.maxint, use sys.maxsize instead. |
| |
| Extension Modules |
| ----------------- |
| |
| - The `hotshot` profiler has been removed; use `cProfile` instead. |
| |
| Library |
| ------- |
| |
| - When loading an external file using testfile(), the passed-in |
| encoding argument was being ignored if __loader__ is defined and |
| forcing the source to be UTF-8. |
| |
| - The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have |
| been removed in favor of the tempfile module. |
| |
| - Removed the 'new' module. |
| |
| - Removed all types from the 'types' module that are easily accessable |
| through builtins. |
| |
| |
| What's New in Python 3.0a1? |
| ========================== |
| |
| *Release date: 31-Aug-2007* |
| |
| Core and Builtins |
| ----------------- |
| |
| - PEP 3131: Support non-ASCII identifiers. |
| |
| - PEP 3120: Change default encoding to UTF-8. |
| |
| - PEP 3123: Use proper C inheritance for PyObject. |
| |
| - Removed the __oct__ and __hex__ special methods and added a bin() |
| builtin function. |
| |
| - PEP 3127: octal literals now start with "0o". Old-style octal |
| literals are invalid. There are binary literals with a prefix of |
| "0b". This also affects int(x, 0). |
| |
| - None, True, False are now keywords. |
| |
| - PEP 3119: isinstance() and issubclass() can be overridden. |
| |
| - Remove BaseException.message. |
| |
| - Remove tuple parameter unpacking (PEP 3113). |
| |
| - Remove the f_restricted attribute from frames. This naturally leads |
| to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted(). |
| |
| - PEP 3132 was accepted. That means that you can do ``a, *b = |
| range(5)`` to assign 0 to a and [1, 2, 3, 4] to b. |
| |
| - range() now returns an iterator rather than a list. Floats are not |
| allowed. xrange() is no longer defined. |
| |
| - Patch #1660500: hide iteration variable in list comps, add set comps |
| and use common code to handle compilation of iterative expressions. |
| |
| - By default, != returns the opposite of ==, unless the latter returns |
| NotImplemented. |
| |
| - Patch #1680961: sys.exitfunc has been removed and replaced with a |
| private C-level API. |
| |
| - PEP 3115: new metaclasses: the metaclass is now specified as a |
| keyword arg in the class statement, which can now use the full |
| syntax of a parameter list. Also, the metaclass can implement a |
| __prepare__ function which will be called to create the dictionary |
| for the new class namespace. |
| |
| - The long-deprecated argument "pend" of PyFloat_FromString() has been |
| removed. |
| |
| - The dir() function has been extended to call the __dir__() method on |
| its argument, if it exists. If not, it will work like before. This |
| allows customizing the output of dir() in the presence of a |
| __getattr__(). |
| |
| - Removed support for __members__ and __methods__. |
| |
| - Removed indexing/slicing on BaseException. |
| |
| - input() became raw_input(): the name input() now implements the |
| functionality formerly known as raw_input(); the name raw_input() is |
| no longer defined. |
| |
| - Classes listed in an 'except' clause must inherit from |
| BaseException. |
| |
| - PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone; |
| and .keys(), .items(), .values() return dict views, which behave |
| like sets. |
| |
| - PEP 3105: print is now a function. Also (not in the PEP) the |
| 'softspace' attribute of files is now gone (since print() doesn't |
| use it). A side effect of this change is that you can get |
| incomplete output lines in interactive sessions: |
| |
| >>> print(42, end="") |
| 42>>> |
| |
| We may be able to fix this after the I/O library rewrite. |
| |
| - PEP 3102: keyword-only arguments. |
| |
| - Int/Long unification is complete. The 'long' built-in type and |
| literals with trailing 'L' or 'l' have been removed. Performance |
| may be sub-optimal (haven't really benchmarked). |
| |
| - 'except E, V' must now be spelled as 'except E as V' and deletes V |
| at the end of the except clause; V must be a simple name. |
| |
| - Added function annotations per PEP 3107. |
| |
| - Added nonlocal declaration from PEP 3104: |
| |
| >>> def f(x): |
| ... def inc(): |
| ... nonlocal x |
| ... x += 1 |
| ... return x |
| ... return inc |
| ... |
| >>> inc = f(0) |
| >>> inc() |
| 1 |
| >>> inc() |
| 2 |
| |
| - Moved intern() to sys.intern(). |
| |
| - exec is now a function. |
| |
| - Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__. |
| |
| - Classic classes are a thing of the past. All classes are new style. |
| |
| - Exceptions *must* derive from BaseException. |
| |
| - Integer division always returns a float. The -Q option is no more. |
| All the following are gone: |
| * PyNumber_Divide and PyNumber_InPlaceDivide |
| * __div__, __rdiv__, and __idiv__ |
| * nb_divide, nb_inplace_divide |
| * operator.div, operator.idiv, operator.__div__, operator.__idiv__ |
| (Only __truediv__ and __floordiv__ remain, not sure how to handle them |
| if we want to re-use __div__ and friends. If we do, it will make |
| it harder to write code for both 2.x and 3.x.) |
| |
| - 'as' and 'with' are keywords. |
| |
| - Absolute import is the default behavior for 'import foo' etc. |
| |
| - Removed support for syntax: backticks (ie, `x`), <>. |
| |
| - Removed these Python builtins: apply(), callable(), coerce(), |
| execfile(), file(), reduce(), reload(). |
| |
| - Removed these Python methods: {}.has_key. |
| |
| - Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT. |
| |
| - Remove C API support for restricted execution. |
| |
| - zip(), map() and filter() now return iterators, behaving like their |
| itertools counterparts. This also affect map()'s behavior on |
| sequences of unequal length -- it now stops after the shortest one |
| is exhausted. |
| |
| - Additions: set literals, set comprehensions, ellipsis literal. |
| |
| - Added class decorators per PEP 3129. |
| |
| |
| Extension Modules |
| ----------------- |
| |
| - Removed the imageop module. Obsolete long with its unit tests |
| becoming useless from the removal of rgbimg and imgfile. |
| |
| - Removed these attributes from the operator module: div, idiv, |
| __div__, __idiv__, isCallable, sequenceIncludes. |
| |
| - Removed these attributes from the sys module: exc_clear(), exc_type, |
| exc_value, exc_traceback. |
| |
| |
| Library |
| ------- |
| |
| - Removed the compiler package. Use of the _ast module and (an |
| eventual) AST -> bytecode mechanism. |
| |
| - Removed these modules: audiodev, Bastion, bsddb185, exceptions, |
| linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha, |
| stringold, strop, sunaudiodev, timing, xmllib. |
| |
| - Moved the toaiff module to Tools/Demos. |
| |
| - Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL, |
| DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile, |
| IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT. |
| |
| - Removed obsolete functions: commands.getstatus(), os.popen*(). |
| |
| - Removed functions in the string module that are also string methods; |
| Remove string.{letters, lowercase, uppercase}. |
| |
| - Removed support for long obsolete platforms: plat-aix3, plat-irix5. |
| |
| - Removed xmlrpclib.SlowParser. It was based on xmllib. |
| |
| - Patch #1680961: atexit has been reimplemented in C. |
| |
| - Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE. |
| |
| Build |
| ----- |
| |
| C API |
| ----- |
| |
| - Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__. |
| |
| - Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(), |
| PyMember_Get, PyMember_Set. |
| |
| - Removed these C slots/fields: nb_divide, nb_inplace_divide. |
| |
| - Removed these macros: staticforward, statichere, PyArg_GetInt, |
| PyArg_NoArgs, _PyObject_Del. |
| |
| - Removed these typedefs: intargfunc, intintargfunc, intobjargproc, |
| intintobjargproc, getreadbufferproc, getwritebufferproc, |
| getsegcountproc, getcharbufferproc, memberlist. |
| |
| Tests |
| ----- |
| |
| - Removed test.testall as test.regrtest replaces it. |
| |
| Documentation |
| ------------- |
| |
| Mac |
| --- |
| |
| - The cfmfile module was removed. |
| |
| Platforms |
| --------- |
| |
| - Support for BeOS and AtheOS was removed (according to PEP 11). |
| |
| - Support for RiscOS, Irix, Tru64 was removed (alledgedly). |
| |
| Tools/Demos |
| ----------- |
| |
| |
| **(For information about older versions, consult the HISTORY file.)** |