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Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
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Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
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Guido van Rossum45aecf42006-03-15 04:58:47 +00007What's New in Python 3000?
8==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +00009
Neal Norwitz4886cc32006-08-21 17:06:07 +000010*Release date: XX-XXX-200X*
11
12TO DO
13-----
14
Georg Brandl66a796e2006-12-19 20:50:34 +000015- See PEP 3000, 3100.
Neal Norwitz4886cc32006-08-21 17:06:07 +000016
Neal Norwitz4886cc32006-08-21 17:06:07 +000017- Weed really old/weird stuff from the library.
18
19- Unify range() and xrange().
20
Neal Norwitz4886cc32006-08-21 17:06:07 +000021- Rework the standard I/O library to use bytes for binary files.
22
23- Make strings all Unicode.
24
Neal Norwitz4886cc32006-08-21 17:06:07 +000025- Get rid of various compatibility-related flags (e.g. division flags).
26
Neal Norwitz378b2c92006-08-29 07:57:22 +000027
Neal Norwitz4886cc32006-08-21 17:06:07 +000028Core and Builtins
29-----------------
30
Brett Cannonba7bf492007-02-27 00:15:55 +000031- Removing indexing/slicing on BaseException.
32
Neal Norwitz2633c692007-02-26 22:22:47 +000033- Remove the exceptions module, all the exceptions are already builtin.
34
Guido van Rossum0240b922007-02-26 21:23:50 +000035- input() becomes raw_input(): the name input() now implements the
36 functionality formerly known as raw_input(); the name raw_input()
37 is no longer defined.
38
Brett Cannon39590462007-02-26 22:01:14 +000039- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +000040
Guido van Rossumcc2b0162007-02-11 06:12:03 +000041- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
42 and .keys(), .items(), .values() return dict views.
43
Guido van Rossum8b545362007-02-09 23:52:14 +000044- PEP 3105: print is now a function. Also (not in the PEP) the
45 'softspace' attribute of files is now gone (since print() doesn't use
46 it). A side effect of this change is that you can get incomplete
47 output lines in interactive sessions:
48
49 >>> print(42, end="")
50 42>>>
51
52 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +000053
Brett Cannon398db8b2007-01-29 23:44:37 +000054- PEP 3102: keyword-only arguments.
55
Guido van Rossumd4588c12007-02-13 19:55:23 +000056- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +000057 and literals with trailing 'L' or 'l' have been removed.
58 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +000059
60- 'except E, V' must now be spelled as 'except E as V' and deletes V
61 at the end of the except clause; V must be a simple name.
62
Neal Norwitzc1505362006-12-28 06:47:50 +000063- Added function annotations per PEP 3107.
64
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +000065- Added nonlocal declaration from PEP 3104
66
67 >>> def f(x):
68 ... def inc():
69 ... nonlocal x
70 ... x += 1
71 ... return x
72 ... return inc
73 ...
74 >>> inc = f(0)
75 >>> inc()
76 1
77 >>> inc()
78 2
79
Georg Brandl66a796e2006-12-19 20:50:34 +000080- Moved intern() to sys.intern().
81
82- exec is now a function.
83
84- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +000085
Neal Norwitz4886cc32006-08-21 17:06:07 +000086- Classic classes are a thing of the past. All classes are new style.
87
88- Exceptions *must* derive from BaseException.
89
90- Integer division always returns a float. The -Q option is no more.
91 All the following are gone:
92 * PyNumber_Divide and PyNumber_InPlaceDivide
93 * __div__, __rdiv__, and __idiv__
94 * nb_divide, nb_inplace_divide
95 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
96 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
97 if we want to re-use __div__ and friends. If we do, it will make
98 it harder to write code for both 2.x and 3.x.)
99
100- 'as' and 'with' are keywords.
101
102- Absolute import is the default behavior for 'import foo' etc.
103
Neal Norwitz378b2c92006-08-29 07:57:22 +0000104- Removed support for syntax:
105 backticks (`x`), <>
106
Neal Norwitz4886cc32006-08-21 17:06:07 +0000107- Removed these Python builtins:
Neal Norwitz81fe3412007-02-26 21:42:55 +0000108 apply(), coerce()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000109
Neal Norwitz378b2c92006-08-29 07:57:22 +0000110- Removed these Python methods:
111 {}.has_key
112
Neal Norwitz4886cc32006-08-21 17:06:07 +0000113- Removed these Python slots:
114 __coerce__, __div__, __idiv__, __rdiv__
115
116- Removed these attributes from Python modules:
117 * operator module: div, idiv, __div__, __idiv__
118
Neal Norwitz4886cc32006-08-21 17:06:07 +0000119- Removed these C APIs:
Neal Norwitz378b2c92006-08-29 07:57:22 +0000120 PyNumber_Coerce(), PyNumber_CoerceEx()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000121
122- Removed these C slots/fields:
123 nb_divide, nb_inplace_divide
124
125- Removed these macros:
126 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs
127
128- Removed these typedefs:
129 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
130 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc
131
132- Removed these opcodes:
Neal Norwitz378b2c92006-08-29 07:57:22 +0000133 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
134
135- zip returns an iterator
136
137- Additions:
Georg Brandl66a796e2006-12-19 20:50:34 +0000138 set literals, ellipsis literal
Neal Norwitz378b2c92006-08-29 07:57:22 +0000139
Neal Norwitz4886cc32006-08-21 17:06:07 +0000140
141Extension Modules
142-----------------
143
144Library
145-------
146
Guido van Rossum893523e2007-01-10 01:29:06 +0000147- Removed all traces of the sets module.
148
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000149Build
150-----
151
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000152C API
153-----
154
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000155Tests
156-----
157
Brett Cannonced04e02005-02-13 22:53:22 +0000158Documentation
159-------------
160
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000161Mac
162---
163
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000164New platforms
165-------------
166
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000167Tools/Demos
168-----------
169
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000170**(For information about older versions, consult the HISTORY file.)**