Mailman 3 March 2008 - Python-Dev

Installing Python 2.6 alpha1 on Windows XP
by Gregor Lingl March 19, 2008

March 19, 2008

Hi Paul, thanks for you efforts, but up to now it still didn't work. I'm using Windows XP Professional (32 bit). I tried an install on two different machines with the same negative result. I proceeded like you suggested. - I installed for all users, - I disabled the register extensions When doing the same call to execute idle as you, I got the following: Traceback (most recent call last): File "c:\Python26\Lib\idlelib\idle.py", line 6, in <module> import PyShell File "c:\Python26\Lib\idlelib\PyShell.py", line 9, in <module> import socket File "c:\Python26\Lib\socket.py", line 46, in <module> import _socket ImportError: DLL load failed: <in German: system cannot find this file> I get a similar error message, when I do from turtle import * with ... import _tkinter Import Error. DLL load failed .... sys.path is exactly like yours. (So the DLLs directory is contained in sys.path) _tkinter.pyd and _socket.pyd are present in DLLs. I've installed Python 2.5 on both machines. On the first one I moreover deleted all entries concerning Python (2.5) from the PATH variable, with no positive effect. On the other machine I have also installed Python 3000 successfully, which even still doesn't have IDLE in it's Menu. Nevertheless there C:\Python30> python Lib\idlelib\idle.py brings up IDLE 3.0a1 (and I even can import and use a port of xturtle.py to Python 3000 there). I never experienced a similar Problem before when installing Python. Any ideas? Regards, Gregor

5 10

Re: [Python-Dev] [Python-3000-checkins] r61522 - python/branches/py3k/Lib/test/test_print.py
by Nick Coghlan March 19, 2008

March 19, 2008

eric.smith wrote: > +@contextmanager > +def stdout_redirected(new_stdout): > + save_stdout = sys.stdout > + sys.stdout = new_stdout > + try: > + yield None > + finally: > + sys.stdout = save_stdout I think this test could easily be tweaked to use test.test_support.captured_stdout rather than reinventing the wheel :) (cc'ing python-dev for visibility since the sprints are generating a lot of python-checkins traffic) Cheers, Nick. -- Nick Coghlan | ncoghlan(a)gmail.com | Brisbane, Australia --------------------------------------------------------------- http://www.boredomandlaziness.org

2 1

3.0 buildbots all red
by Trent Nelson March 19, 2008

March 19, 2008

http://www.python.org/dev/buildbot/3.0/ New sprint idea: getting all (inc. trunk) the buildbots green by Thursday. Anyone interested? Trent.

9 15

changing regrtest to handle import errors
by Neal Norwitz March 18, 2008

March 18, 2008

[changing to: and subject: ] On Tue, Mar 18, 2008 at 4:09 PM, Guido van Rossum <guido(a)python.org> wrote: > On Tue, Mar 18, 2008 at 3:58 PM, neal.norwitz > <python-3000-checkins(a)python.org> wrote: > > Get this test to pass (UserList/UserDict no longer exist and caused a skip). > > I think the automatic skip on ImportError is harmful. > > We should add a helper function to test_support so that you can write > > foobar = test_support.import_optional('foobar') > > and it will skip the test if foobar cannot be imported; all other > failing imports should cause the test to *fail*. > > Any takers? This should be an easy two-part task. This would be a great starter project for a new developer. http://bugs.python.org/issue2409 Let me know if you could use some help. Feel free to contact me on or off list. n

2 1

PyErr_Warn or PyErr_WarnEx
by Benjamin Peterson March 18, 2008

March 18, 2008

Now that we're aggressively adding Py3k warnings to the trunk, I think it's a good time to get this straightened out. The docs [1] say PyErr_Warn is deprecated in favor of PyErr_WarnEx. However, I have seen both in recent checkins. What is preferred? [1] http://docs.python.org/dev/c-api/exceptions.html Cheers, Benjamin Peterson

2 1

Re: [Python-Dev] [Python-checkins] r61577 - in python/trunk: Include/code.h Include/compile.h Include/parsetok.h Include/pythonrun.h Lib/__future__.py Lib/test/test_print.py Misc/ACKS Misc/NEWS Parser/parser.c Parser/parsetok.c Python/bltinmodule.c Python/future.c ...
by Trent Nelson March 18, 2008

March 18, 2008

This change breaks all the trunk buildbots: ====================================================================== ERROR: testCompileLibrary (test.test_compiler.CompilerTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "S:\buildbots\python\trunk.nelson-windows\build\lib\test\test_compiler.py", line 52, in testCompileLibrary compiler.compile(buf, basename, "exec") File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\pycodegen.py", line 64, in compile gen.compile() File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\pycodegen.py", line 112, in compile gen = ModuleCodeGenerator(tree) File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\pycodegen.py", line 1275, in __init__ self.futures = future.find_futures(tree) File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\future.py", line 59, in find_futures walk(node, p1) File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\visitor.py", line 106, in walk walker.preorder(tree, visitor) File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\visitor.py", line 63, in preorder self.dispatch(tree, *args) # XXX *args make sense? File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\visitor.py", line 57, in dispatch return meth(node, *args) File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\future.py", line 27, in visitModule if not self.check_stmt(s): File "S:\buildbots\python\trunk.nelson-windows\build\lib\compiler\future.py", line 37, in check_stmt "future feature %s is not defined" % name SyntaxError: future feature print_function is not defined ________________________________________ From: python-checkins-bounces+tnelson=onresolve.com(a)python.org [python-checkins-bounces+tnelson=onresolve.com(a)python.org] On Behalf Of eric.smith [python-checkins(a)python.org] Sent: 18 March 2008 19:45 To: python-checkins(a)python.org Subject: [Python-checkins] r61577 - in python/trunk: Include/code.h Include/compile.h Include/parsetok.h Include/pythonrun.h Lib/__future__.py Lib/test/test_print.py Misc/ACKS Misc/NEWS Parser/parser.c Parser/parsetok.c Python/bltinmodule.c Python/future.c Pyth... Author: eric.smith Date: Wed Mar 19 00:45:49 2008 New Revision: 61577 Added: python/trunk/Lib/test/test_print.py Modified: python/trunk/Include/code.h python/trunk/Include/compile.h python/trunk/Include/parsetok.h python/trunk/Include/pythonrun.h python/trunk/Lib/__future__.py python/trunk/Misc/ACKS python/trunk/Misc/NEWS python/trunk/Parser/parser.c python/trunk/Parser/parsetok.c python/trunk/Python/bltinmodule.c python/trunk/Python/future.c python/trunk/Python/pythonrun.c Log: Backport of the print function, using a __future__ import. This work is substantially Anthony Baxter's, from issue 1633807. I just freshened it, made a few minor tweaks, and added the test cases. I also created issue 2412, which is to check for 2to3's behavior with the print function. I also added myself to ACKS. Modified: python/trunk/Include/code.h ============================================================================== --- python/trunk/Include/code.h (original) +++ python/trunk/Include/code.h Wed Mar 19 00:45:49 2008 @@ -48,11 +48,12 @@ #define CO_FUTURE_DIVISION 0x2000 #define CO_FUTURE_ABSOLUTE_IMPORT 0x4000 /* do absolute imports by default */ #define CO_FUTURE_WITH_STATEMENT 0x8000 +#define CO_FUTURE_PRINT_FUNCTION 0x10000 /* This should be defined if a future statement modifies the syntax. For example, when a keyword is added. */ -#if 0 +#if 1 #define PY_PARSER_REQUIRES_FUTURE_KEYWORD #endif Modified: python/trunk/Include/compile.h ============================================================================== --- python/trunk/Include/compile.h (original) +++ python/trunk/Include/compile.h Wed Mar 19 00:45:49 2008 @@ -24,6 +24,8 @@ #define FUTURE_DIVISION "division" #define FUTURE_ABSOLUTE_IMPORT "absolute_import" #define FUTURE_WITH_STATEMENT "with_statement" +#define FUTURE_PRINT_FUNCTION "print_function" + struct _mod; /* Declare the existence of this type */ PyAPI_FUNC(PyCodeObject *) PyAST_Compile(struct _mod *, const char *, Modified: python/trunk/Include/parsetok.h ============================================================================== --- python/trunk/Include/parsetok.h (original) +++ python/trunk/Include/parsetok.h Wed Mar 19 00:45:49 2008 @@ -27,6 +27,10 @@ #define PyPARSE_WITH_IS_KEYWORD 0x0003 #endif +#define PyPARSE_PRINT_IS_FUNCTION 0x0004 + + + PyAPI_FUNC(node *) PyParser_ParseString(const char *, grammar *, int, perrdetail *); PyAPI_FUNC(node *) PyParser_ParseFile (FILE *, const char *, grammar *, int, Modified: python/trunk/Include/pythonrun.h ============================================================================== --- python/trunk/Include/pythonrun.h (original) +++ python/trunk/Include/pythonrun.h Wed Mar 19 00:45:49 2008 @@ -8,7 +8,7 @@ #endif #define PyCF_MASK (CO_FUTURE_DIVISION | CO_FUTURE_ABSOLUTE_IMPORT | \ - CO_FUTURE_WITH_STATEMENT) + CO_FUTURE_WITH_STATEMENT|CO_FUTURE_PRINT_FUNCTION) #define PyCF_MASK_OBSOLETE (CO_NESTED) #define PyCF_SOURCE_IS_UTF8 0x0100 #define PyCF_DONT_IMPLY_DEDENT 0x0200 Modified: python/trunk/Lib/__future__.py ============================================================================== --- python/trunk/Lib/__future__.py (original) +++ python/trunk/Lib/__future__.py Wed Mar 19 00:45:49 2008 @@ -53,6 +53,7 @@ "division", "absolute_import", "with_statement", + "print_function", ] __all__ = ["all_feature_names"] + all_feature_names @@ -66,6 +67,7 @@ CO_FUTURE_DIVISION = 0x2000 # division CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # perform absolute imports by default CO_FUTURE_WITH_STATEMENT = 0x8000 # with statement +CO_FUTURE_PRINT_FUNCTION = 0x10000 # print function class _Feature: def __init__(self, optionalRelease, mandatoryRelease, compiler_flag): @@ -114,3 +116,7 @@ with_statement = _Feature((2, 5, 0, "alpha", 1), (2, 6, 0, "alpha", 0), CO_FUTURE_WITH_STATEMENT) + +print_function = _Feature((2, 6, 0, "alpha", 2), + (3, 0, 0, "alpha", 0), + CO_FUTURE_PRINT_FUNCTION) Added: python/trunk/Lib/test/test_print.py ============================================================================== --- (empty file) +++ python/trunk/Lib/test/test_print.py Wed Mar 19 00:45:49 2008 @@ -0,0 +1,129 @@ +"""Test correct operation of the print function. +""" + +from __future__ import print_function + +import unittest +from test import test_support + +import sys +try: + # 3.x + from io import StringIO +except ImportError: + # 2.x + from StringIO import StringIO + +from contextlib import contextmanager + +NotDefined = object() + +# A dispatch table all 8 combinations of providing +# sep, end, and file +# I use this machinery so that I'm not just passing default +# values to print, I'm eiher passing or not passing in the +# arguments +dispatch = { + (False, False, False): + lambda args, sep, end, file: print(*args), + (False, False, True): + lambda args, sep, end, file: print(file=file, *args), + (False, True, False): + lambda args, sep, end, file: print(end=end, *args), + (False, True, True): + lambda args, sep, end, file: print(end=end, file=file, *args), + (True, False, False): + lambda args, sep, end, file: print(sep=sep, *args), + (True, False, True): + lambda args, sep, end, file: print(sep=sep, file=file, *args), + (True, True, False): + lambda args, sep, end, file: print(sep=sep, end=end, *args), + (True, True, True): + lambda args, sep, end, file: print(sep=sep, end=end, file=file, *args), + } + +@contextmanager +def stdout_redirected(new_stdout): + save_stdout = sys.stdout + sys.stdout = new_stdout + try: + yield None + finally: + sys.stdout = save_stdout + +# Class used to test __str__ and print +class ClassWith__str__: + def __init__(self, x): + self.x = x + def __str__(self): + return self.x + +class TestPrint(unittest.TestCase): + def check(self, expected, args, + sep=NotDefined, end=NotDefined, file=NotDefined): + # Capture sys.stdout in a StringIO. Call print with args, + # and with sep, end, and file, if they're defined. Result + # must match expected. + + # Look up the actual function to call, based on if sep, end, and file + # are defined + fn = dispatch[(sep is not NotDefined, + end is not NotDefined, + file is not NotDefined)] + + t = StringIO() + with stdout_redirected(t): + fn(args, sep, end, file) + + self.assertEqual(t.getvalue(), expected) + + def test_print(self): + def x(expected, args, sep=NotDefined, end=NotDefined): + # Run the test 2 ways: not using file, and using + # file directed to a StringIO + + self.check(expected, args, sep=sep, end=end) + + # When writing to a file, stdout is expected to be empty + o = StringIO() + self.check('', args, sep=sep, end=end, file=o) + + # And o will contain the expected output + self.assertEqual(o.getvalue(), expected) + + x('\n', ()) + x('a\n', ('a',)) + x('None\n', (None,)) + x('1 2\n', (1, 2)) + x('1 2\n', (1, ' ', 2)) + x('1*2\n', (1, 2), sep='*') + x('1 s', (1, 's'), end='') + x('a\nb\n', ('a', 'b'), sep='\n') + x('1.01', (1.0, 1), sep='', end='') + x('1*a*1.3+', (1, 'a', 1.3), sep='*', end='+') + x('a\n\nb\n', ('a\n', 'b'), sep='\n') + x('\0+ +\0\n', ('\0', ' ', '\0'), sep='+') + + x('a\n b\n', ('a\n', 'b')) + x('a\n b\n', ('a\n', 'b'), sep=None) + x('a\n b\n', ('a\n', 'b'), end=None) + x('a\n b\n', ('a\n', 'b'), sep=None, end=None) + + x('*\n', (ClassWith__str__('*'),)) + x('abc 1\n', (ClassWith__str__('abc'), 1)) + + # 2.x unicode tests + x(u'1 2\n', ('1', u'2')) + x(u'u\1234\n', (u'u\1234',)) + x(u' abc 1\n', (' ', ClassWith__str__(u'abc'), 1)) + + # errors + self.assertRaises(TypeError, print, '', sep=3) + self.assertRaises(TypeError, print, '', end=3) + self.assertRaises(AttributeError, print, '', file='') + +def test_main(): + test_support.run_unittest(TestPrint) + +if __name__ == "__main__": + test_main() Modified: python/trunk/Misc/ACKS ============================================================================== --- python/trunk/Misc/ACKS (original) +++ python/trunk/Misc/ACKS Wed Mar 19 00:45:49 2008 @@ -622,6 +622,7 @@ J. Sipprell Kragen Sitaker Christopher Smith +Eric V. Smith Gregory P. Smith Rafal Smotrzyk Dirk Soede Modified: python/trunk/Misc/NEWS ============================================================================== --- python/trunk/Misc/NEWS (original) +++ python/trunk/Misc/NEWS Wed Mar 19 00:45:49 2008 @@ -12,6 +12,9 @@ Core and builtins ----------------- +- Issue 1745. Backport print function with: + from __future__ import print_function + - Issue 2332: add new attribute names for instance method objects. The two changes are: im_self -> __self__ and im_func -> __func__ Modified: python/trunk/Parser/parser.c ============================================================================== --- python/trunk/Parser/parser.c (original) +++ python/trunk/Parser/parser.c Wed Mar 19 00:45:49 2008 @@ -149,12 +149,10 @@ strcmp(l->lb_str, s) != 0) continue; #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD - if (!(ps->p_flags & CO_FUTURE_WITH_STATEMENT)) { - if (s[0] == 'w' && strcmp(s, "with") == 0) - break; /* not a keyword yet */ - else if (s[0] == 'a' && strcmp(s, "as") == 0) - break; /* not a keyword yet */ - } + if (ps->p_flags & CO_FUTURE_PRINT_FUNCTION && + s[0] == 'p' && strcmp(s, "print") == 0) { + break; /* no longer a keyword */ + } #endif D(printf("It's a keyword\n")); return n - i; @@ -208,6 +206,10 @@ strcmp(STR(CHILD(cch, 0)), "with_statement") == 0) { ps->p_flags |= CO_FUTURE_WITH_STATEMENT; break; + } else if (NCH(cch) >= 1 && TYPE(CHILD(cch, 0)) == NAME && + strcmp(STR(CHILD(cch, 0)), "print_function") == 0) { + ps->p_flags |= CO_FUTURE_PRINT_FUNCTION; + break; } } } Modified: python/trunk/Parser/parsetok.c ============================================================================== --- python/trunk/Parser/parsetok.c (original) +++ python/trunk/Parser/parsetok.c Wed Mar 19 00:45:49 2008 @@ -123,8 +123,8 @@ return NULL; } #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD - if (flags & PyPARSE_WITH_IS_KEYWORD) - ps->p_flags |= CO_FUTURE_WITH_STATEMENT; + if (flags & PyPARSE_PRINT_IS_FUNCTION) + ps->p_flags |= CO_FUTURE_PRINT_FUNCTION; #endif for (;;) { @@ -167,26 +167,6 @@ str[len] = '\0'; #ifdef PY_PARSER_REQUIRES_FUTURE_KEYWORD - /* This is only necessary to support the "as" warning, but - we don't want to warn about "as" in import statements. */ - if (type == NAME && - len == 6 && str[0] == 'i' && strcmp(str, "import") == 0) - handling_import = 1; - - /* Warn about with as NAME */ - if (type == NAME && - !(ps->p_flags & CO_FUTURE_WITH_STATEMENT)) { - if (len == 4 && str[0] == 'w' && strcmp(str, "with") == 0) - warn(with_msg, err_ret->filename, tok->lineno); - else if (!(handling_import || handling_with) && - len == 2 && str[0] == 'a' && - strcmp(str, "as") == 0) - warn(as_msg, err_ret->filename, tok->lineno); - } - else if (type == NAME && - (ps->p_flags & CO_FUTURE_WITH_STATEMENT) && - len == 4 && str[0] == 'w' && strcmp(str, "with") == 0) - handling_with = 1; #endif if (a >= tok->line_start) col_offset = a - tok->line_start; Modified: python/trunk/Python/bltinmodule.c ============================================================================== --- python/trunk/Python/bltinmodule.c (original) +++ python/trunk/Python/bltinmodule.c Wed Mar 19 00:45:49 2008 @@ -1486,6 +1486,78 @@ equivalent to (x**y) % z, but may be more efficient (e.g. for longs)."); +static PyObject * +builtin_print(PyObject *self, PyObject *args, PyObject *kwds) +{ + static char *kwlist[] = {"sep", "end", "file", 0}; + static PyObject *dummy_args; + PyObject *sep = NULL, *end = NULL, *file = NULL; + int i, err; + + if (dummy_args == NULL) { + if (!(dummy_args = PyTuple_New(0))) + return NULL; + } + if (!PyArg_ParseTupleAndKeywords(dummy_args, kwds, "|OOO:print", + kwlist, &sep, &end, &file)) + return NULL; + if (file == NULL || file == Py_None) { + file = PySys_GetObject("stdout"); + /* sys.stdout may be None when FILE* stdout isn't connected */ + if (file == Py_None) + Py_RETURN_NONE; + } + + if (sep && sep != Py_None && !PyString_Check(sep) && + !PyUnicode_Check(sep)) { + PyErr_Format(PyExc_TypeError, + "sep must be None, str or unicode, not %.200s", + sep->ob_type->tp_name); + return NULL; + } + if (end && end != Py_None && !PyString_Check(end) && + !PyUnicode_Check(end)) { + PyErr_Format(PyExc_TypeError, + "end must be None, str or unicode, not %.200s", + end->ob_type->tp_name); + return NULL; + } + + for (i = 0; i < PyTuple_Size(args); i++) { + if (i > 0) { + if (sep == NULL || sep == Py_None) + err = PyFile_WriteString(" ", file); + else + err = PyFile_WriteObject(sep, file, + Py_PRINT_RAW); + if (err) + return NULL; + } + err = PyFile_WriteObject(PyTuple_GetItem(args, i), file, + Py_PRINT_RAW); + if (err) + return NULL; + } + + if (end == NULL || end == Py_None) + err = PyFile_WriteString("\n", file); + else + err = PyFile_WriteObject(end, file, Py_PRINT_RAW); + if (err) + return NULL; + + Py_RETURN_NONE; +} + +PyDoc_STRVAR(print_doc, +"print(value, ..., sep=' ', end='\\n', file=sys.stdout)\n\ +\n\ +Prints the values to a stream, or to sys.stdout by default.\n\ +Optional keyword arguments:\n\ +file: a file-like object (stream); defaults to the current sys.stdout.\n\ +sep: string inserted between values, default a space.\n\ +end: string appended after the last value, default a newline."); + /* Return number of items in range (lo, hi, step), when arguments are * PyInt or PyLong objects. step > 0 required. Return a value < 0 if @@ -2424,6 +2496,7 @@ {"open", (PyCFunction)builtin_open, METH_VARARGS | METH_KEYWORDS, open_doc}, {"ord", builtin_ord, METH_O, ord_doc}, {"pow", builtin_pow, METH_VARARGS, pow_doc}, + {"print", (PyCFunction)builtin_print, METH_VARARGS | METH_KEYWORDS, print_doc}, {"range", builtin_range, METH_VARARGS, range_doc}, {"raw_input", builtin_raw_input, METH_VARARGS, raw_input_doc}, {"reduce", builtin_reduce, METH_VARARGS, reduce_doc}, Modified: python/trunk/Python/future.c ============================================================================== --- python/trunk/Python/future.c (original) +++ python/trunk/Python/future.c Wed Mar 19 00:45:49 2008 @@ -33,6 +33,8 @@ ff->ff_features |= CO_FUTURE_ABSOLUTE_IMPORT; } else if (strcmp(feature, FUTURE_WITH_STATEMENT) == 0) { ff->ff_features |= CO_FUTURE_WITH_STATEMENT; + } else if (strcmp(feature, FUTURE_PRINT_FUNCTION) == 0) { + ff->ff_features |= CO_FUTURE_PRINT_FUNCTION; } else if (strcmp(feature, "braces") == 0) { PyErr_SetString(PyExc_SyntaxError, "not a chance"); Modified: python/trunk/Python/pythonrun.c ============================================================================== --- python/trunk/Python/pythonrun.c (original) +++ python/trunk/Python/pythonrun.c Wed Mar 19 00:45:49 2008 @@ -738,18 +738,19 @@ } } +#if 0 /* compute parser flags based on compiler flags */ #define PARSER_FLAGS(flags) \ ((flags) ? ((((flags)->cf_flags & PyCF_DONT_IMPLY_DEDENT) ? \ PyPARSE_DONT_IMPLY_DEDENT : 0)) : 0) - -#if 0 +#endif +#if 1 /* Keep an example of flags with future keyword support. */ #define PARSER_FLAGS(flags) \ ((flags) ? ((((flags)->cf_flags & PyCF_DONT_IMPLY_DEDENT) ? \ PyPARSE_DONT_IMPLY_DEDENT : 0) \ - | ((flags)->cf_flags & CO_FUTURE_WITH_STATEMENT ? \ - PyPARSE_WITH_IS_KEYWORD : 0)) : 0) + | ((flags)->cf_flags & CO_FUTURE_PRINT_FUNCTION ? \ + PyPARSE_PRINT_IS_FUNCTION : 0)) : 0) #endif int _______________________________________________ Python-checkins mailing list Python-checkins(a)python.org http://mail.python.org/mailman/listinfo/python-checkins

2 2

embedding in multi threaded C/C++
by George Fazekas March 18, 2008

March 18, 2008

Hi all, I'm working on embedding Python in a multi threaded application but found mostly old or confusing info on this. Can anyone point me to the right direction or send some working examples? Detail: Python 2.5.1, MacOSX Leopard 10.5.1, using Pytohn/C API The application initializes Python in a shared library, which in turn links in more libraries that may or may not use C API commands in parallel. Generally it all works fine, but when two libraries try to access Python code I get seg fault or similar. The closest I got to resolve this is based on this message: http://groups.google.fi/group/comp.lang.python/msg/fe4e114d1e1a741d which suggests starting a new sub interpreter for each task. However, i still get errors like below. (Thread 0 on it's own works fine.) According to the docs PyObject_HasAttrString should always succeeds so I don't understand what happens. Also I get thread mix-up messages randomly even though I double checked the implementation. 2 Threads accessing Python: ------------------------------- Thread 0 Crashed: 0 org.python.python 0x15a58bcc PyErr_Occurred + 16 (errors.c:77) 1 org.python.python 0x159c642c instance_getattr + 277 (classobject.c:698) 2 org.python.python 0x159f789b PyObject_HasAttrString + 116 (object.c:1069) While Thread 4 is running a process: ---------------------------------------- Thread 4: 0 org.python.python 0x15a43751 PyEval_EvalFrameEx + 794 (ceval.c:852) 1 org.python.python 0x15a49cdc PyEval_EvalCodeEx + 1819 (ceval.c:2831) 2 org.python.python 0x159df537 function_call + 320 (funcobject.c:517) 3 org.python.python 0x159be278 PyObject_Call + 45 (abstract.c:1860) 4 org.python.python 0x159c5ee5 instancemethod_call + 401 (classobject.c:2497) 5 org.python.python 0x159c297c PyObject_CallMethodObjArgs + 223 (abstract.c:1860) Thanks for any advice, George

2 1

pre-checkin test suggestion for python repository
by Gregory P. Smith March 18, 2008

March 18, 2008

The tabs/spaces checker that is run before doing a svn ci on the python repository spits out an error message about which files have problems. Could someone please update this error message to say something to the effect of "run Tools/scripts/reindent.py on every file listed above and rerun your tests to fix this before checking in" thanks -gps

2 1

Re: [Python-Dev] map, filter, zip in future_builtins
by David Wolever March 18, 2008

March 18, 2008

On 18-Mar-08, at 6:01 PM, Benjamin Peterson wrote: >> Couldn't you just import imap as map? > What do you mean? Import imap as map in future_builtins.c? > Like the Python: > import itertools > map = intertools.map > type(map(lambda x: x, range(3))) == map # True Ah, that's a much better idea :P I'll do that.

1 0

Bug in Pickle protocol involving __setstate__
by Greg Kochanski March 18, 2008

March 18, 2008

If we have a hierarchy of classes, and we use __getstate__/__setstate__, the wrong version of __setstate__ gets called. Possibly, this is a documentation problem, but here goes: Take two classes, A and B, where B is the child of A. Construct a B. Pickle it. Unpickle it, and you find that the __setstate__ function for A is called with the result produced by B.__getstate__(). This is wrong. An example follows: import pickle as P class A(object): def __init__(self, a): print 'A.__init__' self.a = a def __getstate__(self): print 'A.__getstate' return self.a def __setstate__(self, upstate): print 'A.__setstate', upstate self.a = upstate class B(A): def __init__(self, a, b): print 'B.__init__' A.__init__(self, a) self.b = b def __getstate__(self): print 'B.__getstate' return (A.__getstate__(self), self.b) def __setstate(self, upstate): # This never gets called! print 'B.__setstate', upstate A.__setstate__(self, upstate[0]) self.b = upstate[1] def __repr__(self): return '<B a=%d b=%d>' % (self.a, self.b) q = B(1,2) print '---' r = P.loads(P.dumps(q, 0)) print 'q=', q print 'r=', r Now, run it: $ python foo.py B.__init__ A.__init__ --- B.__getstate A.__getstate A.__setstate (1, 2) q= <B a=1 b=2, h=46912504218064> r= Traceback (most recent call last): File "foo.py", line 44, in <module> print 'r=', r File "foo.py", line 37, in __repr__ return '<B a=%d b=%d>' % (self.a, self.b) AttributeError: 'B' object has no attribute 'b' $

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