Skip Montanaro | e5d7f7f | 2002-09-20 14:16:59 +0000 | [diff] [blame] | 1 | +++++++++++ |
| 2 | Python News |
| 3 | +++++++++++ |
| 4 | |
Anthony Baxter | b0c6630 | 2004-11-04 05:23:17 +0000 | [diff] [blame] | 5 | (editors: check NEWS.help for information about editing NEWS using ReST.) |
| 6 | |
Guido van Rossum | 45aecf4 | 2006-03-15 04:58:47 +0000 | [diff] [blame] | 7 | What's New in Python 3000? |
| 8 | ========================== |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 9 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 10 | *Release date: XX-XXX-200X* |
| 11 | |
| 12 | TO DO |
| 13 | ----- |
| 14 | |
Georg Brandl | 66a796e | 2006-12-19 20:50:34 +0000 | [diff] [blame] | 15 | - See PEP 3000, 3100. |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 16 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 17 | - Weed really old/weird stuff from the library. |
| 18 | |
| 19 | - Unify range() and xrange(). |
| 20 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 21 | - Rework the standard I/O library to use bytes for binary files. |
| 22 | |
| 23 | - Make strings all Unicode. |
| 24 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 25 | - Get rid of various compatibility-related flags (e.g. division flags). |
| 26 | |
Neal Norwitz | 378b2c9 | 2006-08-29 07:57:22 +0000 | [diff] [blame] | 27 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 28 | Core and Builtins |
| 29 | ----------------- |
| 30 | |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame^] | 31 | - Patch #1660500: hide iteration variable in list comps, add set comps |
| 32 | and use common code to handle compilation of iterative expressions |
| 33 | |
Guido van Rossum | e27dc72 | 2007-03-27 22:37:34 +0000 | [diff] [blame] | 34 | - By default, != returns the opposite of ==, unless the latter returns |
| 35 | NotImplemented. |
| 36 | |
Collin Winter | 670e692 | 2007-03-21 02:57:17 +0000 | [diff] [blame] | 37 | - Patch #1680961: sys.exitfunc has been removed and replaced with a private |
| 38 | C-level API. |
| 39 | |
Georg Brandl | 801dd73 | 2007-03-18 20:18:31 +0000 | [diff] [blame] | 40 | - PEP 3115: new metaclasses: the metaclass is now specified as a |
| 41 | keyword arg in the class statement, which can now use the full syntax of |
| 42 | a parameter list. Also, the metaclass can implement a __prepare__ function |
| 43 | which will be called to create the dictionary for the new class namespace. |
| 44 | |
Georg Brandl | 428f064 | 2007-03-18 18:35:15 +0000 | [diff] [blame] | 45 | - The long-deprecated argument "pend" of PyFloat_FromString() has been |
| 46 | removed. |
| 47 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 48 | - The dir() function has been extended to call the __dir__() method on |
| 49 | its argument, if it exists. If not, it will work like before. This allows |
| 50 | customizing the output of dir() in the presence of a __getattr__(). |
Brett Cannon | ba7bf49 | 2007-02-27 00:15:55 +0000 | [diff] [blame] | 51 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 52 | - Removed indexing/slicing on BaseException. |
Neal Norwitz | 2633c69 | 2007-02-26 22:22:47 +0000 | [diff] [blame] | 53 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 54 | - Removed the exceptions module, all the exceptions are already builtin. |
| 55 | |
| 56 | - input() became raw_input(): the name input() now implements the |
Guido van Rossum | 0240b92 | 2007-02-26 21:23:50 +0000 | [diff] [blame] | 57 | functionality formerly known as raw_input(); the name raw_input() |
| 58 | is no longer defined. |
| 59 | |
Brett Cannon | 3959046 | 2007-02-26 22:01:14 +0000 | [diff] [blame] | 60 | - Classes listed in an 'except' clause must inherit from BaseException. |
Brett Cannon | f74225d | 2007-02-26 21:10:16 +0000 | [diff] [blame] | 61 | |
Guido van Rossum | cc2b016 | 2007-02-11 06:12:03 +0000 | [diff] [blame] | 62 | - PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone; |
| 63 | and .keys(), .items(), .values() return dict views. |
| 64 | |
Guido van Rossum | 8b54536 | 2007-02-09 23:52:14 +0000 | [diff] [blame] | 65 | - PEP 3105: print is now a function. Also (not in the PEP) the |
| 66 | 'softspace' attribute of files is now gone (since print() doesn't use |
| 67 | it). A side effect of this change is that you can get incomplete |
| 68 | output lines in interactive sessions: |
| 69 | |
| 70 | >>> print(42, end="") |
| 71 | 42>>> |
| 72 | |
| 73 | We may be able to fix this after the I/O library rewrite. |
Guido van Rossum | 4502c80 | 2007-02-09 05:42:38 +0000 | [diff] [blame] | 74 | |
Brett Cannon | 398db8b | 2007-01-29 23:44:37 +0000 | [diff] [blame] | 75 | - PEP 3102: keyword-only arguments. |
| 76 | |
Guido van Rossum | d4588c1 | 2007-02-13 19:55:23 +0000 | [diff] [blame] | 77 | - Int/Long unification is complete. The 'long' built-in type |
Guido van Rossum | ec7027f | 2007-01-30 00:00:40 +0000 | [diff] [blame] | 78 | and literals with trailing 'L' or 'l' have been removed. |
| 79 | Performance may be sub-optimal (haven't really benchmarked). |
Guido van Rossum | ab18684 | 2007-01-14 03:42:30 +0000 | [diff] [blame] | 80 | |
| 81 | - 'except E, V' must now be spelled as 'except E as V' and deletes V |
| 82 | at the end of the except clause; V must be a simple name. |
| 83 | |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 84 | - Added function annotations per PEP 3107. |
| 85 | |
Jeremy Hylton | a4f9fc6 | 2007-02-27 15:53:28 +0000 | [diff] [blame] | 86 | - Added nonlocal declaration from PEP 3104 |
| 87 | |
| 88 | >>> def f(x): |
| 89 | ... def inc(): |
| 90 | ... nonlocal x |
| 91 | ... x += 1 |
| 92 | ... return x |
| 93 | ... return inc |
| 94 | ... |
| 95 | >>> inc = f(0) |
| 96 | >>> inc() |
| 97 | 1 |
| 98 | >>> inc() |
| 99 | 2 |
| 100 | |
Georg Brandl | 66a796e | 2006-12-19 20:50:34 +0000 | [diff] [blame] | 101 | - Moved intern() to sys.intern(). |
| 102 | |
| 103 | - exec is now a function. |
| 104 | |
| 105 | - Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__. |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 106 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 107 | - Classic classes are a thing of the past. All classes are new style. |
| 108 | |
| 109 | - Exceptions *must* derive from BaseException. |
| 110 | |
| 111 | - Integer division always returns a float. The -Q option is no more. |
| 112 | All the following are gone: |
| 113 | * PyNumber_Divide and PyNumber_InPlaceDivide |
| 114 | * __div__, __rdiv__, and __idiv__ |
| 115 | * nb_divide, nb_inplace_divide |
| 116 | * operator.div, operator.idiv, operator.__div__, operator.__idiv__ |
| 117 | (Only __truediv__ and __floordiv__ remain, not sure how to handle them |
| 118 | if we want to re-use __div__ and friends. If we do, it will make |
| 119 | it harder to write code for both 2.x and 3.x.) |
| 120 | |
| 121 | - 'as' and 'with' are keywords. |
| 122 | |
| 123 | - Absolute import is the default behavior for 'import foo' etc. |
| 124 | |
Neal Norwitz | 378b2c9 | 2006-08-29 07:57:22 +0000 | [diff] [blame] | 125 | - Removed support for syntax: |
| 126 | backticks (`x`), <> |
| 127 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 128 | - Removed these Python builtins: |
Neal Norwitz | 81fe341 | 2007-02-26 21:42:55 +0000 | [diff] [blame] | 129 | apply(), coerce() |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 130 | |
Neal Norwitz | 378b2c9 | 2006-08-29 07:57:22 +0000 | [diff] [blame] | 131 | - Removed these Python methods: |
| 132 | {}.has_key |
| 133 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 134 | - Removed these Python slots: |
| 135 | __coerce__, __div__, __idiv__, __rdiv__ |
| 136 | |
| 137 | - Removed these attributes from Python modules: |
| 138 | * operator module: div, idiv, __div__, __idiv__ |
| 139 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 140 | - Removed these C APIs: |
Neal Norwitz | 378b2c9 | 2006-08-29 07:57:22 +0000 | [diff] [blame] | 141 | PyNumber_Coerce(), PyNumber_CoerceEx() |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 142 | |
| 143 | - Removed these C slots/fields: |
| 144 | nb_divide, nb_inplace_divide |
| 145 | |
| 146 | - Removed these macros: |
| 147 | staticforward, statichere, PyArg_GetInt, PyArg_NoArgs |
| 148 | |
| 149 | - Removed these typedefs: |
| 150 | intargfunc, intintargfunc, intobjargproc, intintobjargproc, |
| 151 | getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc |
| 152 | |
| 153 | - Removed these opcodes: |
Neal Norwitz | 378b2c9 | 2006-08-29 07:57:22 +0000 | [diff] [blame] | 154 | BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT |
| 155 | |
| 156 | - zip returns an iterator |
| 157 | |
| 158 | - Additions: |
Georg Brandl | 66a796e | 2006-12-19 20:50:34 +0000 | [diff] [blame] | 159 | set literals, ellipsis literal |
Neal Norwitz | 378b2c9 | 2006-08-29 07:57:22 +0000 | [diff] [blame] | 160 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 161 | |
| 162 | Extension Modules |
| 163 | ----------------- |
| 164 | |
Collin Winter | 390d29c | 2007-03-21 20:10:51 +0000 | [diff] [blame] | 165 | - isCallable() and sequenceIncludes() have been removed from the operator |
| 166 | module. |
| 167 | |
| 168 | |
Neal Norwitz | 4886cc3 | 2006-08-21 17:06:07 +0000 | [diff] [blame] | 169 | Library |
| 170 | ------- |
| 171 | |
Collin Winter | 670e692 | 2007-03-21 02:57:17 +0000 | [diff] [blame] | 172 | - Patch #1680961: atexit has been reimplemented in C. |
| 173 | |
Guido van Rossum | 893523e | 2007-01-10 01:29:06 +0000 | [diff] [blame] | 174 | - Removed all traces of the sets module. |
| 175 | |
Raymond Hettinger | 4901a1f | 2004-12-02 08:59:14 +0000 | [diff] [blame] | 176 | Build |
| 177 | ----- |
| 178 | |
Raymond Hettinger | 4901a1f | 2004-12-02 08:59:14 +0000 | [diff] [blame] | 179 | C API |
| 180 | ----- |
| 181 | |
Raymond Hettinger | 4901a1f | 2004-12-02 08:59:14 +0000 | [diff] [blame] | 182 | Tests |
| 183 | ----- |
| 184 | |
Brett Cannon | ced04e0 | 2005-02-13 22:53:22 +0000 | [diff] [blame] | 185 | Documentation |
| 186 | ------------- |
| 187 | |
Raymond Hettinger | 4901a1f | 2004-12-02 08:59:14 +0000 | [diff] [blame] | 188 | Mac |
| 189 | --- |
| 190 | |
Hye-Shik Chang | 4e42281 | 2005-07-17 02:36:59 +0000 | [diff] [blame] | 191 | New platforms |
| 192 | ------------- |
| 193 | |
Raymond Hettinger | 4901a1f | 2004-12-02 08:59:14 +0000 | [diff] [blame] | 194 | Tools/Demos |
| 195 | ----------- |
| 196 | |
Skip Montanaro | e5d7f7f | 2002-09-20 14:16:59 +0000 | [diff] [blame] | 197 | **(For information about older versions, consult the HISTORY file.)** |