cpython-lru_cache-weakref: Include/opcode.h history

rather than passing locals to the class body, just execute the class body in the proper environment

Thu, 16 May 2013 14:37:25 -0500

rather than passing locals to the class body, just execute the class body in the proper environment

check local class namespace before reaching for cells (closes #17853)

Tue, 30 Apr 2013 09:41:40 -0400

check local class namespace before reaching for cells (closes #17853)

Implement PEP 380 - 'yield from' (closes #11682)

Fri, 13 Jan 2012 21:43:40 +1000

Implement PEP 380 - 'yield from' (closes #11682)

excise the remains of STOP_CODE, which hasn't done anything useful for years

Sun, 17 Jul 2011 22:49:50 -0500

excise the remains of STOP_CODE, which hasn't done anything useful for years

#4617: Previously it was illegal to delete a name from the local

Fri, 10 Sep 2010 21:39:53 +0000

#4617: Previously it was illegal to delete a name from the local
namespace if it occurs as a free variable in a nested block. This limitation
of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF).

This sample was valid in 2.6, but fails to compile in 3.x without this change::

>>> def f():
... def print_error():
... print(e)
... try:
... something
... except Exception as e:
... print_error()
... # implicit "del e" here

This sample has always been invalid in Python, and now works::

>>> def outer(x):
... def inner():
... return x
... inner()
... del x

There is no need to bump the PYC magic number: the new opcode is used
for code that did not compile before.

Issue #9225: Remove the ROT_FOUR and DUP_TOPX opcode, the latter replaced

Sat, 04 Sep 2010 18:43:52 +0000

Issue #9225: Remove the ROT_FOUR and DUP_TOPX opcode, the latter replaced
by the new (and simpler) DUP_TOP_TWO. Performance isn't changed, but
our bytecode is a bit simplified. Patch by Demur Rumed.

revert unintended changes

Tue, 20 Jul 2010 22:39:34 +0000

revert unintended changes

move test_trace.py so as not to conflict with future tests for the trace module

Tue, 20 Jul 2010 22:37:19 +0000

move test_trace.py so as not to conflict with future tests for the trace module

Merged revisions 72912,72920,72940 via svnmerge from

Sun, 28 Jun 2009 03:18:59 +0000

Merged revisions 72912,72920,72940 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
r72912 | benjamin.peterson | 2009-05-25 08:13:44 -0500 (Mon, 25 May 2009) | 5 lines

add a SETUP_WITH opcode

It speeds up the with statement and correctly looks up the special
methods involved.
........
r72920 | benjamin.peterson | 2009-05-25 15:12:57 -0500 (Mon, 25 May 2009) | 1 line

take into account the fact that SETUP_WITH pushes a finally block
........
r72940 | benjamin.peterson | 2009-05-26 07:49:59 -0500 (Tue, 26 May 2009) | 1 line

teach the peepholer about SETUP_WITH
........

http://bugs.python.org/issue4715

Wed, 25 Feb 2009 02:25:04 +0000

http://bugs.python.org/issue4715

This patch by Antoine Pitrou optimizes the bytecode for conditional branches by
merging the following "POP_TOP" instruction into the conditional jump. For
example, the list comprehension "[x for x in l if not x]" produced the
following bytecode:

1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 23 (to 32)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 JUMP_IF_TRUE 10 (to 28)
18 POP_TOP
19 LOAD_FAST 1 (x)
22 LIST_APPEND 2
25 JUMP_ABSOLUTE 6
>> 28 POP_TOP
29 JUMP_ABSOLUTE 6
>> 32 RETURN_VALUE

but after the patch it produces the following bytecode:

1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 18 (to 27)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
15 POP_JUMP_IF_TRUE 6
18 LOAD_FAST 1 (x)
21 LIST_APPEND 2
24 JUMP_ABSOLUTE 6
>> 27 RETURN_VALUE

Notice that not only the code is shorter, but the conditional jump
(POP_JUMP_IF_TRUE) jumps right to the start of the loop instead of going through
the JUMP_ABSOLUTE at the end. "continue" statements are helped
similarly.

Furthermore, the old jump opcodes (JUMP_IF_FALSE, JUMP_IF_TRUE) have been
replaced by two new opcodes:
- JUMP_IF_TRUE_OR_POP, which jumps if true and pops otherwise
- JUMP_IF_FALSE_OR_POP, which jumps if false and pops otherwise

Merged revisions 67818 via svnmerge from

Thu, 18 Dec 2008 11:06:25 +0000

Merged revisions 67818 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
r67818 | antoine.pitrou | 2008-12-17 01:38:28 +0100 (mer., 17 déc. 2008) | 3 lines

Issue #2183: Simplify and optimize bytecode for list comprehensions.
........

#3021: Antoine Pitrou's Lexical exception handlers

Wed, 11 Jun 2008 15:59:43 +0000

#3021: Antoine Pitrou's Lexical exception handlers

Merged revisions 59541-59561 via svnmerge from

Wed, 19 Dec 2007 02:07:34 +0000

Merged revisions 59541-59561 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
r59544 | raymond.hettinger | 2007-12-18 01:13:45 +0100 (Tue, 18 Dec 2007) | 1 line

Add more namedtuple() test cases. Neaten the code and comments.
........
r59545 | christian.heimes | 2007-12-18 04:38:03 +0100 (Tue, 18 Dec 2007) | 3 lines

Fixed for #1601: IDLE not working correctly on Windows (Py30a2/IDLE30a1)

Amaury's ideas works great. Should we build the Python core with WINVER=0x0500 and _WIN32_WINNT=0x0500, too?
........
r59546 | christian.heimes | 2007-12-18 10:00:13 +0100 (Tue, 18 Dec 2007) | 1 line

Make it a bit easier to test Tcl/Tk and idle from a build dir.
........
r59547 | christian.heimes | 2007-12-18 10:12:10 +0100 (Tue, 18 Dec 2007) | 1 line

Removed several unused files from the PCbuild9 directory. They are relics from the past.
........
r59548 | raymond.hettinger | 2007-12-18 19:26:18 +0100 (Tue, 18 Dec 2007) | 29 lines

Speed-up dictionary constructor by about 10%.

New opcode, STORE_MAP saves the compiler from awkward stack manipulations
and specializes for dicts using PyDict_SetItem instead of PyObject_SetItem.

Old disassembly:
0 BUILD_MAP 0
3 DUP_TOP
4 LOAD_CONST 1 (1)
7 ROT_TWO
8 LOAD_CONST 2 ('x')
11 STORE_SUBSCR
12 DUP_TOP
13 LOAD_CONST 3 (2)
16 ROT_TWO
17 LOAD_CONST 4 ('y')
20 STORE_SUBSCR

New disassembly:
0 BUILD_MAP 0
3 LOAD_CONST 1 (1)
6 LOAD_CONST 2 ('x')
9 STORE_MAP
10 LOAD_CONST 3 (2)
13 LOAD_CONST 4 ('y')
16 STORE_MAP
........
r59549 | thomas.heller | 2007-12-18 20:00:34 +0100 (Tue, 18 Dec 2007) | 2 lines

Issue #1642: Fix segfault in ctypes when trying to delete attributes.
........
r59551 | guido.van.rossum | 2007-12-18 21:10:42 +0100 (Tue, 18 Dec 2007) | 2 lines

Issue #1645 by Alberto Bertogli. Fix a comment.
........
r59553 | raymond.hettinger | 2007-12-18 22:24:09 +0100 (Tue, 18 Dec 2007) | 12 lines

Give meaning to the oparg for BUILD_MAP: estimated size of the dictionary.

Allows dictionaries to be pre-sized (upto 255 elements) saving time lost
to re-sizes with their attendant mallocs and re-insertions.

Has zero effect on small dictionaries (5 elements or fewer), a slight
benefit for dicts upto 22 elements (because they had to resize once
anyway), and more benefit for dicts upto 255 elements (saving multiple
resizes during the build-up and reducing the number of collisions on
the first insertions). Beyond 255 elements, there is no addional benefit.
........
r59554 | christian.heimes | 2007-12-18 22:56:09 +0100 (Tue, 18 Dec 2007) | 1 line

Fixed #1649: IDLE error: dictionary changed size during iteration
........
r59557 | raymond.hettinger | 2007-12-18 23:21:27 +0100 (Tue, 18 Dec 2007) | 1 line

Simplify and speedup _asdict() for named tuples.
........
r59558 | christian.heimes | 2007-12-19 00:22:54 +0100 (Wed, 19 Dec 2007) | 3 lines

Applied patch #1635: Float patch for inf and nan on Windows (and other platforms).

The patch unifies float("inf") and repr(float("inf")) on all platforms.
........
r59559 | raymond.hettinger | 2007-12-19 00:51:15 +0100 (Wed, 19 Dec 2007) | 1 line

Users demand iterable input for named tuples. The author capitulates.
........
r59560 | raymond.hettinger | 2007-12-19 01:21:06 +0100 (Wed, 19 Dec 2007) | 1 line

Beef-up tests for dict literals
........
r59561 | raymond.hettinger | 2007-12-19 01:27:21 +0100 (Wed, 19 Dec 2007) | 1 line

Zap a duplicate line
........

Merging the py3k-pep3137 branch back into the py3k branch.

Tue, 06 Nov 2007 21:34:58 +0000

Merging the py3k-pep3137 branch back into the py3k branch.
No detailed change log; just check out the change log for the py3k-pep3137
branch. The most obvious changes:

- str8 renamed to bytes (PyString at the C level);
- bytes renamed to buffer (PyBytes at the C level);
- PyString and PyUnicode are no longer compatible.

I.e. we now have an immutable bytes type and a mutable bytes type.

The behavior of PyString was modified quite a bit, to make it more
bytes-like. Some changes are still on the to-do list.

Remove the simple slicing API. All slicing is now done with slice objects.

Thu, 30 Aug 2007 22:57:53 +0000

Remove the simple slicing API. All slicing is now done with slice objects.

Merged revisions 56301-56442 via svnmerge from

Wed, 18 Jul 2007 18:15:48 +0000

Merged revisions 56301-56442 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/p3yk

................
r56322 | kurt.kaiser | 2007-07-12 11:35:03 -0700 (Thu, 12 Jul 2007) | 2 lines

Replace obscure code which was failing in py3k.
................
r56323 | kurt.kaiser | 2007-07-12 11:44:12 -0700 (Thu, 12 Jul 2007) | 3 lines

1. Remove new division option
2. Update IDLE version to 3.0x
................
r56327 | kurt.kaiser | 2007-07-12 12:20:20 -0700 (Thu, 12 Jul 2007) | 5 lines

Fix another instance of this defect in Tkinter, and one in IDLE.

Patch 1724999 by Ali Gholami Rudi -- avoid complaints about dict size
change during iter in destroy call.
................
r56339 | georg.brandl | 2007-07-13 03:07:25 -0700 (Fri, 13 Jul 2007) | 2 lines

Fix #1753310: regrtest -x doesn't work anymore
................
r56361 | kurt.kaiser | 2007-07-13 18:25:24 -0700 (Fri, 13 Jul 2007) | 2 lines

convert a map() iterator to a list to get this working.
................
r56362 | kurt.kaiser | 2007-07-13 18:53:45 -0700 (Fri, 13 Jul 2007) | 2 lines

Was modifying dict during iteration.
................
r56376 | collin.winter | 2007-07-14 11:56:19 -0700 (Sat, 14 Jul 2007) | 1 line

Add an example of class decorators to test_grammar.
................
r56377 | collin.winter | 2007-07-14 12:00:17 -0700 (Sat, 14 Jul 2007) | 1 line

Add a basic example of dictcomps to test_grammar.
................
r56413 | neal.norwitz | 2007-07-17 00:21:18 -0700 (Tue, 17 Jul 2007) | 149 lines

Merged revisions 56202-56412 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
r56204 | ronald.oussoren | 2007-07-08 23:02:21 -0700 (Sun, 08 Jul 2007) | 2 lines

Patch 1693258: Fix for duplicate "preferences" menu-OS X
........
r56207 | ronald.oussoren | 2007-07-09 01:41:15 -0700 (Mon, 09 Jul 2007) | 4 lines

Patch 1673122: be explicit about which libtool to use, to avoid name clashes
when a users install GNU libtool early in his PATH
........
r56280 | georg.brandl | 2007-07-11 12:41:49 -0700 (Wed, 11 Jul 2007) | 2 lines

Fix #1752132: wrong comment in opcode description.
........
r56293 | georg.brandl | 2007-07-12 01:05:45 -0700 (Thu, 12 Jul 2007) | 3 lines

Patch #1752270, #1750931: complain if urllib2 add_handler called
without handler.
........
r56296 | georg.brandl | 2007-07-12 01:11:29 -0700 (Thu, 12 Jul 2007) | 2 lines

Patch #1739696: use code.co_code only if really necessary
........
r56298 | georg.brandl | 2007-07-12 01:38:00 -0700 (Thu, 12 Jul 2007) | 3 lines

Patch #1673759: add a missing overflow check when formatting floats
with %G.
........
r56302 | georg.brandl | 2007-07-12 02:06:41 -0700 (Thu, 12 Jul 2007) | 2 lines

Patch #1731659: improve time.strptime docs.
........
r56304 | georg.brandl | 2007-07-12 02:24:04 -0700 (Thu, 12 Jul 2007) | 2 lines

Patch #1731169: clean up expected skips list.
........
r56306 | georg.brandl | 2007-07-12 02:37:49 -0700 (Thu, 12 Jul 2007) | 3 lines

Bug #1637365: add subsection about "__name__ == __main__" to the
Python tutorial.
........
r56308 | georg.brandl | 2007-07-12 02:59:22 -0700 (Thu, 12 Jul 2007) | 5 lines

Patch #1675424: Added tests for uncovered code in the zipfile module.
The KeyError raised by Zipfile.getinfo for nonexistent names now has
a descriptive message.
........
r56340 | facundo.batista | 2007-07-13 03:43:44 -0700 (Fri, 13 Jul 2007) | 6 lines

Added tests for basic behavior of DateTime, Binary, and Fault classes
and the escape function. Check that marshalling recursive sequences &
dicts raises TypeError. Check that marshalling out-of-range ints
raises OverflowError [Alan McIntyre - GSoC]
........
r56345 | raymond.hettinger | 2007-07-13 05:09:41 -0700 (Fri, 13 Jul 2007) | 1 line

Correct the docs for takewhile(). Improve the recipe for nth(). Should be backported
........
r56348 | thomas.heller | 2007-07-13 06:59:39 -0700 (Fri, 13 Jul 2007) | 4 lines

Repair COMError. Since exceptions are new style classes now, setting
the methods and docstring after the type creation does not work, they
must be in the dictionary before creating the type.
........
r56349 | thomas.heller | 2007-07-13 07:18:06 -0700 (Fri, 13 Jul 2007) | 1 line

Add tests for _ctypes.COMError.
........
r56350 | thomas.heller | 2007-07-13 09:50:43 -0700 (Fri, 13 Jul 2007) | 4 lines

Do not try to load the GLUT library in the ctypes tests. This test
adds little value, but has a large problem on OS X, as explained in
SF# 1581906.
........
r56352 | thomas.heller | 2007-07-13 10:12:23 -0700 (Fri, 13 Jul 2007) | 3 lines

Fix for SF# 1701409: segfault in c_char_p of ctypes. The repr output
of c_char_p and c_wchar_p has changed as a sideeffect.
........
r56355 | thomas.heller | 2007-07-13 10:46:54 -0700 (Fri, 13 Jul 2007) | 3 lines

Fix for SF# 1649098: avoid zero-sized array declaration in structure.
........
r56357 | thomas.heller | 2007-07-13 12:51:55 -0700 (Fri, 13 Jul 2007) | 3 lines

PyType_stgdict() returns a borrowed reference which must not be
Py_DECREF'd.
........
r56360 | barry.warsaw | 2007-07-13 15:12:58 -0700 (Fri, 13 Jul 2007) | 10 lines

In response to this SF bug:

[ 1752723 ] email.message_from_string: initial line gets discarded

I added a test to assert that when the first line of text passed to
message_from_string() contains a leading space, the message ends up with the
appropriate FirstHeaderLineIsContinuationDefect on its defects list.

The bug is invalid.
........
r56364 | georg.brandl | 2007-07-14 10:12:23 -0700 (Sat, 14 Jul 2007) | 2 lines

Bug #1753406: missing \versionadded for subprocess.check_call.
........
r56366 | georg.brandl | 2007-07-14 10:32:41 -0700 (Sat, 14 Jul 2007) | 2 lines

Clarify webbrowser.open description.
........
r56380 | andrew.kuchling | 2007-07-14 13:58:21 -0700 (Sat, 14 Jul 2007) | 1 line

Typo fix
........
r56382 | andrew.kuchling | 2007-07-14 14:56:19 -0700 (Sat, 14 Jul 2007) | 7 lines

Avoid exception if there's a stray directory inside a Maildir folder.

The Maildir specification doesn't seem to say anything about this
situation, and it can happen if you're keeping a Maildir mailbox in
Subversion (.svn directories) or some similar system. The patch just
ignores directories in the cur/, new/, tmp/ folders.
........
r56392 | facundo.batista | 2007-07-14 15:41:45 -0700 (Sat, 14 Jul 2007) | 6 lines

First version. Includes tests for helper functions: read, write,
_exception, readwrite, closeall, compact_traceback; and for classes
dispatcher, dispatcher_with_send, and file_wrapper.
[Alan McIntyre - GSoC]
........
r56399 | facundo.batista | 2007-07-15 13:30:39 -0700 (Sun, 15 Jul 2007) | 5 lines

Changed the used port and commented out some tests that uses
a non documented function that appers to uses resources
not present in Windows.
........
r56412 | facundo.batista | 2007-07-16 19:19:39 -0700 (Mon, 16 Jul 2007) | 6 lines

Prevent asyncore.dispatcher tests from hanging by adding loop counters
to server & client, and by adding asyncore.close_all calls in
tearDown. Also choose correct expected logging results based on the
value of __debug__ [Alan McIntyre - GSoC]
........
................
r56442 | guido.van.rossum | 2007-07-18 10:26:38 -0700 (Wed, 18 Jul 2007) | 14 lines

Merged revisions 56413-56441 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
r56439 | georg.brandl | 2007-07-17 23:37:55 -0700 (Tue, 17 Jul 2007) | 2 lines

Use "Unix" as platform name, not "UNIX".
........
r56441 | guido.van.rossum | 2007-07-18 10:19:14 -0700 (Wed, 18 Jul 2007) | 3 lines

SF patch# 1755885 by Kurt Kaiser: show location of Unicode escape errors.
(Slightly tweaked for style and refcounts.)
........
................

Merged revisions 55225-55227,55229-55269 via svnmerge from

Fri, 11 May 2007 16:50:42 +0000

Merged revisions 55225-55227,55229-55269 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/p3yk

................
r55238 | guido.van.rossum | 2007-05-10 16:46:05 -0700 (Thu, 10 May 2007) | 9 lines

Merged revisions 55227 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
r55227 | guido.van.rossum | 2007-05-10 10:20:15 -0700 (Thu, 10 May 2007) | 2 lines

Fix a bug in test_c_api() that caused a negative refcount.
........
................
r55246 | neal.norwitz | 2007-05-11 00:01:52 -0700 (Fri, 11 May 2007) | 1 line

Remove commands.getstatus() it is obsolete.
................
r55248 | neal.norwitz | 2007-05-11 00:29:05 -0700 (Fri, 11 May 2007) | 2 lines

Remove bsddb185 support.
................
r55249 | neal.norwitz | 2007-05-11 00:29:50 -0700 (Fri, 11 May 2007) | 1 line

Remove bsddb185 module too
................
r55250 | neal.norwitz | 2007-05-11 00:32:13 -0700 (Fri, 11 May 2007) | 1 line

bsddb185: Gotta remove from the file checked in, not Setup
................
r55251 | neal.norwitz | 2007-05-11 00:53:26 -0700 (Fri, 11 May 2007) | 1 line

Remove obsolete IRIX modules (as much as I could find, there is probably more)
................
r55252 | neal.norwitz | 2007-05-11 00:55:35 -0700 (Fri, 11 May 2007) | 1 line

Remove SGI turd.
................
r55254 | georg.brandl | 2007-05-11 03:11:01 -0700 (Fri, 11 May 2007) | 2 lines

Add a case for set comprehensions to the "cannot assign to" switch.
................
r55255 | georg.brandl | 2007-05-11 03:11:25 -0700 (Fri, 11 May 2007) | 2 lines

Fix wrong imports.
................
r55261 | georg.brandl | 2007-05-11 07:37:48 -0700 (Fri, 11 May 2007) | 2 lines

Remove removed tex files.
................
r55262 | georg.brandl | 2007-05-11 08:28:41 -0700 (Fri, 11 May 2007) | 2 lines

Commit PEP 3132 implementation.
................
r55264 | georg.brandl | 2007-05-11 08:50:19 -0700 (Fri, 11 May 2007) | 2 lines

Check in the inevitable AST version number and format Py_ssize_t with %zd.
................
r55265 | neal.norwitz | 2007-05-11 09:12:22 -0700 (Fri, 11 May 2007) | 1 line

Remove mention of os.popen* and popen2.* since these will be removed.
................
r55266 | neal.norwitz | 2007-05-11 09:19:57 -0700 (Fri, 11 May 2007) | 1 line

Get doc to build again (almost, the doc is fine)
................
r55267 | neal.norwitz | 2007-05-11 09:21:02 -0700 (Fri, 11 May 2007) | 1 line

Really get doc to build (remove use of string module)
................
r55269 | neal.norwitz | 2007-05-11 09:29:43 -0700 (Fri, 11 May 2007) | 1 line

Add some notes to cleanup later
................

Hide list comp variables and support set comprehensions

Sun, 15 Apr 2007 12:05:43 +0000

Hide list comp variables and support set comprehensions

Implement PEP 3115 -- new metaclass syntax and semantics.

Sun, 18 Mar 2007 15:41:51 +0000

Implement PEP 3115 -- new metaclass syntax and semantics.
The compiler package hasn't been updated yet; test_compiler.py fails.
Otherwise all tests seem to be passing now. There are no occurrences
of __metaclass__ left in the standard library.
Docs have not been updated.

Bytes literal.

Fri, 23 Feb 2007 19:56:57 +0000

Bytes literal.

* Remove PRINT_ITEM(_TO), PRINT_NEWLINE(_TO) opcodes.

Fri, 09 Feb 2007 21:28:07 +0000

* Remove PRINT_ITEM(_TO), PRINT_NEWLINE(_TO) opcodes.
* Fix some docstrings and one Print -> print.
* Fix test_{class,code,descrtut,dis,extcall,parser,popen,pkg,subprocess,syntax,traceback}.
These were the ones that generated code with a print statement.
In most remaining failing tests there's an issue with the soft space.

Patch #1550800: make exec a function.

Wed, 06 Sep 2006 06:51:57 +0000

Patch #1550800: make exec a function.

SF patch 1547796 by Georg Brandl -- set literals.

Mon, 28 Aug 2006 15:27:34 +0000

SF patch 1547796 by Georg Brandl -- set literals.

Remove the UNARY_CONVERT opcode (was used for backticks). Also bumped up the

Fri, 25 Aug 2006 05:05:30 +0000

Remove the UNARY_CONVERT opcode (was used for backticks). Also bumped up the
import MAGIC number.

INPLACE_DIVIDE is no longer necessary (INPLACE_TRUE_DIVIDE is used).

Fri, 17 Mar 2006 08:59:09 +0000

INPLACE_DIVIDE is no longer necessary (INPLACE_TRUE_DIVIDE is used).

Get rid of last vestiges of BINARY_DIVIDE.

Thu, 16 Mar 2006 06:02:10 +0000

Get rid of last vestiges of BINARY_DIVIDE.

Issue #2333: Backport set and dict comprehensions syntax.

Mon, 11 Jan 2010 22:36:12 +0000

Issue #2333: Backport set and dict comprehensions syntax.

Issue #2335: Backport set literals syntax from Python 3.x.

Sat, 09 Jan 2010 23:35:54 +0000

Issue #2335: Backport set literals syntax from Python 3.x.

add a SETUP_WITH opcode

Mon, 25 May 2009 13:13:44 +0000

add a SETUP_WITH opcode

It speeds up the with statement and correctly looks up the special
methods involved.

Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with

Sat, 28 Feb 2009 19:03:21 +0000

Backport r69961 to trunk, replacing JUMP_IF_{TRUE,FALSE} with
POP_JUMP_IF_{TRUE,FALSE} and JUMP_IF_{TRUE,FALSE}_OR_POP. This avoids executing
a POP_TOP on each conditional and sometimes allows the peephole optimizer to
skip a JUMP_ABSOLUTE entirely. It speeds up list comprehensions significantly.

Issue #2183: Simplify and optimize bytecode for list comprehensions.

Wed, 17 Dec 2008 00:38:28 +0000

Issue #2183: Simplify and optimize bytecode for list comprehensions.

Speed-up dictionary constructor by about 10%.

Tue, 18 Dec 2007 18:26:18 +0000

Speed-up dictionary constructor by about 10%.

New opcode, STORE_MAP saves the compiler from awkward stack manipulations
and specializes for dicts using PyDict_SetItem instead of PyObject_SetItem.

Old disassembly:
0 BUILD_MAP 0
3 DUP_TOP
4 LOAD_CONST 1 (1)
7 ROT_TWO
8 LOAD_CONST 2 ('x')
11 STORE_SUBSCR
12 DUP_TOP
13 LOAD_CONST 3 (2)
16 ROT_TWO
17 LOAD_CONST 4 ('y')
20 STORE_SUBSCR

New disassembly:
0 BUILD_MAP 0
3 LOAD_CONST 1 (1)
6 LOAD_CONST 2 ('x')
9 STORE_MAP
10 LOAD_CONST 3 (2)
13 LOAD_CONST 4 ('y')
16 STORE_MAP

Fix #1752132: wrong comment in opcode description.

Wed, 11 Jul 2007 19:41:49 +0000

Fix #1752132: wrong comment in opcode description.

PEP 343 -- the with-statement.

Mon, 27 Feb 2006 22:32:47 +0000

PEP 343 -- the with-statement.

This was started by Mike Bland and completed by Guido
(with help from Neal).

This still needs a __future__ statement added;
Thomas is working on Michael's patch for that aspect.

There's a small amount of code cleanup and refactoring
in ast.c, compile.c and ceval.c (I fixed the lltrace
behavior when EXT_POP is used -- however I had to make
lltrace a static global).

Install two code generation optimizations that depend on NOP.

Mon, 21 Jun 2004 16:31:15 +0000

Install two code generation optimizations that depend on NOP.
Reduces the cost of "not" to almost zero.

SF patch #910929: Optimize list comprehensions

Sun, 07 Mar 2004 07:31:06 +0000

SF patch #910929: Optimize list comprehensions

Add a new opcode, LIST_APPEND, and apply it to the code generation for
list comprehensions. Reduces the per-loop overhead by about a third.

Revert the previous enhancement to the bytecode optimizer.

Thu, 24 Apr 2003 05:45:23 +0000

Revert the previous enhancement to the bytecode optimizer.
The additional code complexity and new NOP opcode were not worth it.

Improved the bytecode optimizer.

Tue, 22 Apr 2003 06:49:11 +0000

Improved the bytecode optimizer.
* Can now test for basic blocks.
* Optimize inverted comparisions.
* Optimize unary_not followed by a conditional jump.
* Added a new opcode, NOP, to keep code size constant.
* Applied NOP to previous transformations where appropriate.

Note, the NOP would not be necessary if other functions were
added to re-target jump addresses and update the co_lnotab mapping.
That would yield slightly faster and cleaner bytecode at the
expense of optimizer simplicity and of keeping it decoupled
from the line-numbering structure.

Further SET_LINENO reomval fixes. See comments in patch #587933.

Fri, 30 Aug 2002 13:09:51 +0000

Further SET_LINENO reomval fixes. See comments in patch #587933.

Use a slightly different strategy to determine when not to call the line
trace function. This removes the need for the RETURN_NONE opcode, so
that's gone again. Update docs and comments to match.

Thanks to Neal and Armin!

Also add a test suite. This should have come with the original patch...

This is my patch

Thu, 15 Aug 2002 14:59:02 +0000

This is my patch

[ 587993 ] SET_LINENO killer

Remove SET_LINENO. Tracing is now supported by inspecting co_lnotab.

Many sundry changes to document and adapt to this change.

The opcode FOR_LOOP no longer exists.

Thu, 13 Jun 2002 17:59:51 +0000

The opcode FOR_LOOP no longer exists.

Patch #494783: Rename cmp_op enumerators.

Tue, 01 Jan 2002 19:59:11 +0000

Patch #494783: Rename cmp_op enumerators.

Implement PEP 238 in its (almost) full glory.

Wed, 08 Aug 2001 05:00:18 +0000

Implement PEP 238 in its (almost) full glory.

This introduces:

- A new operator // that means floor division (the kind of division
where 1/2 is 0).

- The "future division" statement ("from __future__ import division)
which changes the meaning of the / operator to implement "true
division" (where 1/2 is 0.5).

- New overloadable operators __truediv__ and __floordiv__.

- New slots in the PyNumberMethods struct for true and floor division,
new abstract APIs for them, new opcodes, and so on.

I emphasize that without the future division statement, the semantics
of / will remain unchanged until Python 3.0.

Not yet implemented are warnings (default off) when / is used with int
or long arguments.

This has been on display since 7/31 as SF patch #443474.

Flames to /dev/null.

Merging the gen-branch into the main line, at Guido's direction. Yay!

Mon, 18 Jun 2001 22:08:13 +0000

Merging the gen-branch into the main line, at Guido's direction. Yay!
Bugfix candidate in inspect.py: it was referencing "self" outside of
a method.

Iterators phase 1. This comprises:

Fri, 20 Apr 2001 19:13:02 +0000

Iterators phase 1. This comprises:

new slot tp_iter in type object, plus new flag Py_TPFLAGS_HAVE_ITER
new C API PyObject_GetIter(), calls tp_iter
new builtin iter(), with two forms: iter(obj), and iter(function, sentinel)
new internal object types iterobject and calliterobject
new exception StopIteration
new opcodes for "for" loops, GET_ITER and FOR_ITER (also supported by dis.py)
new magic number for .pyc files
new special method for instances: __iter__() returns an iterator
iteration over dictionaries: "for x in dict" iterates over the keys
iteration over files: "for x in file" iterates over lines

TODO:

documentation
test suite
decide whether to use a different way to spell iter(function, sentinal)
decide whether "for key in dict" is a good idea
use iterators in map/filter/reduce, min/max, and elsewhere (in/not in?)
speed tuning (make next() a slot tp_next???)

Allow 'continue' inside 'try' clause

Thu, 01 Feb 2001 22:48:12 +0000

Allow 'continue' inside 'try' clause
SF patch 102989 by Thomas Wouters

PEP 227 implementation

Thu, 25 Jan 2001 20:06:59 +0000

PEP 227 implementation

The majority of the changes are in the compiler. The mainloop changes
primarily to implement the new opcodes and to pass a function's
closure to eval_code2(). Frames and functions got new slots to hold
the closure.

Include/compile.h
Add co_freevars and co_cellvars slots to code objects.
Update PyCode_New() to take freevars and cellvars as arguments
Include/funcobject.h
Add func_closure slot to function objects.
Add GetClosure()/SetClosure() functions (and corresponding
macros) for getting at the closure.
Include/frameobject.h
PyFrame_New() now takes a closure.
Include/opcode.h
Add four new opcodes: MAKE_CLOSURE, LOAD_CLOSURE, LOAD_DEREF,
STORE_DEREF.
Remove comment about old requirement for opcodes to fit in 7
bits.
compile.c
Implement changes to code objects for co_freevars and co_cellvars.

Modify symbol table to use st_cur_name (string object for the name
of the current scope) and st_cur_children (list of nested blocks).
Also define st_nested, which might more properly be called
st_cur_nested. Add several DEF_XXX flags to track def-use
information for free variables.

New or modified functions of note:
com_make_closure(struct compiling *, PyCodeObject *)
Emit LOAD_CLOSURE opcodes as needed to pass cells for free
variables into nested scope.
com_addop_varname(struct compiling *, int, char *)
Emits opcodes for LOAD_DEREF and STORE_DEREF.
get_ref_type(struct compiling *, char *name)
Return NAME_CLOSURE if ref type is FREE or CELL
symtable_load_symbols(struct compiling *)
Decides what variables are cell or free based on def-use info.
Can now raise SyntaxError if nested scopes are mixed with
exec or from blah import *.
make_scope_info(PyObject *, PyObject *, int, int)
Helper functions for symtable scope stack.
symtable_update_free_vars(struct symtable *)
After a code block has been analyzed, it must check each of
its children for free variables that are not defined in the
block. If a variable is free in a child and not defined in
the parent, then it is defined by block the enclosing the
current one or it is a global. This does the right logic.
symtable_add_use() is now a macro for symtable_add_def()
symtable_assign(struct symtable *, node *)
Use goto instead of for (;;)

Fixed bug in symtable where name of keyword argument in function
call was treated as assignment in the scope of the call site. Ex:
def f():
g(a=2) # a was considered a local of f

ceval.c
eval_code2() now take one more argument, a closure.
Implement LOAD_CLOSURE, LOAD_DEREF, STORE_DEREF, MAKE_CLOSURE>

Also: When name error occurs for global variable, report that the
name was global in the error mesage.

Objects/frameobject.c
Initialize f_closure to be a tuple containing space for cellvars
and freevars. f_closure is NULL if neither are present.
Objects/funcobject.c
Add support for func_closure.
Python/import.c
Change the magic number.
Python/marshal.c
Track changes to code objects.

Rich comparisons: ensure that LT == Py_LT, etc.

Wed, 17 Jan 2001 15:21:09 +0000

Rich comparisons: ensure that LT == Py_LT, etc.

REMOVED all CWI, CNRI and BeOpen copyright markings.

Fri, 01 Sep 2000 23:29:29 +0000

REMOVED all CWI, CNRI and BeOpen copyright markings.
This should match the situation in the 1.6b1 tree.

The real suport for augmented assignment: new opcodes, new PyNumber and

Thu, 24 Aug 2000 20:09:45 +0000

The real suport for augmented assignment: new opcodes, new PyNumber and
PySequence methods and functions, new tokens.

Charles G. Waldman :

Thu, 24 Aug 2000 00:32:09 +0000

Charles G. Waldman :
Add the EXTENDED_ARG opcode to the virtual machine, allowing 32-bit
arguments to opcodes instead of being forced to stick to the 16-bit
limit. This is especially useful for machine-generated code, which
can be too long for the SET_LINENO parameter to fit into 16 bits.

This closes the implementation portion of SourceForge patch #100893.

PEP 214, Extended print Statement, has been accepted by the BDFL.

Mon, 21 Aug 2000 15:36:27 +0000

PEP 214, Extended print Statement, has been accepted by the BDFL.

This adds the two new opcodes to support this feature: PRINT_ITEM_TO,
PRINT_NEWLINE_TO.

Apply SF patch #101135, adding 'import module as m' and 'from module import

Thu, 17 Aug 2000 22:55:00 +0000

Apply SF patch #101135, adding 'import module as m' and 'from module import
name as n'. By doing some twists and turns, "as" is not a reserved word.

There is a slight change in semantics for 'from module import name' (it will
now honour the 'global' keyword) but only in cases that are explicitly
undocumented.

Merge UNPACK_LIST and UNPACK_TUPLE into a single UNPACK_SEQUENCE, since they

Fri, 11 Aug 2000 22:15:52 +0000

Merge UNPACK_LIST and UNPACK_TUPLE into a single UNPACK_SEQUENCE, since they
did the same anyway.

I'm not sure what to do with Tools/compiler/compiler/* -- that isn't part of
distutils, is it ? Should it try to be compatible with old bytecode version ?

Change copyright notice - 2nd try.

Fri, 30 Jun 2000 23:58:06 +0000

Change copyright notice - 2nd try.

Change copyright notice.

Fri, 30 Jun 2000 23:50:40 +0000

Change copyright notice.

remove reference to CALL_FUNCTION_STAR in comment

Wed, 29 Mar 2000 00:10:03 +0000

remove reference to CALL_FUNCTION_STAR in comment

slightly modified version of Greg Ewing's extended call syntax patch

Tue, 28 Mar 2000 23:49:17 +0000

slightly modified version of Greg Ewing's extended call syntax patch

executive summary:
Instead of typing 'apply(f, args, kwargs)' you can type 'f(*arg, **kwargs)'.
Some file-by-file details follow.

Grammar/Grammar:
simplify varargslist, replacing '*' '*' with '**'
add * & ** options to arglist

Include/opcode.h & Lib/dis.py:
define three new opcodes
CALL_FUNCTION_VAR
CALL_FUNCTION_KW
CALL_FUNCTION_VAR_KW

Python/ceval.c:
extend TypeError "keyword parameter redefined" message to include
the name of the offending keyword
reindent CALL_FUNCTION using four spaces
add handling of sequences and dictionaries using extend calls
fix function import_from to use PyErr_Format

Get rid of some obsolete opcodes.

Tue, 07 Jul 1998 14:58:39 +0000

Get rid of some obsolete opcodes.

Get rid of obsolete ACCESS_MODE opcode.

Fri, 09 May 1997 00:39:04 +0000

Get rid of obsolete ACCESS_MODE opcode.