Mailman 3 December 2001 - Python-Dev

on the subject of SF...
by Anthony Baxter 06 Dec '01

06 Dec '01

can someone with the appropriate level of magickness add a 'Python 2.1.2' group to the bug tracker and patch tracker? I've been meaning to get this done for a while... ta. Anthony

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python2.1.2 plans, plus the curse of PEP-006.
by Anthony Baxter 06 Dec '01

06 Dec '01

Ok, after a bit of an unfortunate break I'm back into the backporting. My current plan is to have a release candidate for 2.1.2 due a couple of days before Christmas, and then try to get it tested as much as possible before a release either in the week between christmas/new year (not optimal) or shortly after. I'd hoped to get this stuff done much sooner, but unfortunately a combination of various personal matters has knocked me out for a couple of weeks. (I'm not sure if it's just me, but it's possible the reason no-one's done two bugfix releases in a row is that PEP-006 is accursed, and brings down the wrath of gods on anyone foolish enough to get involved. I'm hoping that the last few weeks horror is over and done now...) Anthony -- Anthony Baxter <anthony(a)interlink.com.au> It's never too late to have a happy childhood.

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pychecker on 2.2 current
by Neal Norwitz 06 Dec '01

06 Dec '01

Only found one potential problem: mimetypes.py:405: No global (sys) found This is inside usage() which presumably should only be used internally. sys is imported if __name__ == '__main__'. So the problem can only be triggered if usage() is called by external source. Possible fixes are: sys could be locally imported in usage() sys could be imported at the module scope usage could be made _usage() to denote it's private Neal

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nested scopes confusion
by Thomas Heller 05 Dec '01

05 Dec '01

I would have expected the following code to print 1, 2, ..., 9. Instead it prints 25, 25, 25, .. 25. def functions(): result = [] for i in range(10): def mth(*args): return i result.append(mth) i = 25 return result for mth in functions(): print mth() Reading PEP227, I can (barely) understand why it behaves this way. How do I achieve the desired effect? Note that the default argument trick (def mth(i=i): ...) does not work because *args is present. Thomas

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Building PyXPCOM from Mozilla source/ImportError: cannot import name _xpcom
by Nalini Prakash 05 Dec '01

05 Dec '01

Apologize if this is not the right group for this question. I am trying to build PyXPCOM from Mozilla 0.9.6 source tree on Win 2000. I have managed to do make successfully and I can import xpcom. When I import xpcom._xpcom, I get "ImportError: cannot import name _xpcom" and the path includes Mozilla bin directory. The configure.html file hints at something being wrong with _xpcom(_d).pyd. How do I fix this problem? TIA, Praki

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[development doc updates]
by Fred L. Drake 05 Dec '01

05 Dec '01

The development version of the documentation has been updated: http://python.sourceforge.net/devel-docs/ A wide variety of minor additions and clarifications.

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Re: [Python-checkins] CVS: python/dist/src configure,1.274,1.275 configure.in,1.283,1.284
by Neil Schemenauer 04 Dec '01

04 Dec '01

> + if test "$Py_DEBUG" = 'true'; then > + : > + else > + OPT="-DNDEBUG $OPT" > + fi > + Shouldn't this go into DEFS? Neil

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[development doc updates]
by Fred L. Drake 04 Dec '01

04 Dec '01

The development version of the documentation has been updated: http://python.sourceforge.net/devel-docs/ The indexes are now working for the Python/C API manual and the Reference Manual.

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Psyco to SourceForge
by Armin Rigo 04 Dec '01

04 Dec '01

Hello everybody, I have opened a "Psyco" project at SourceForge: http://sourceforge.net/projects/psyco/ I suggest that people interested in Psyco post a welcome and start discussion in the mailing list that I am currently opening there. This will allow me to stop (mis)using python-dev(a)python.org for announces. The source code I have uploaded at SourceForge (and in a .tgz archive at the Psyco homepage) is version 0.3.4, which is an important rewrite over the previous version. I have tried to address the two 'bad design' issues I mentionned in ISSUES.txt: * pycompiler.c-and-friends are much clearer now, thanks to a clean interface in vcompiler.h and processor.h to all the gory details; * the structure of the Python-dependent part Psyco now very closely follows that of the Python interpreter. Anyone used to the Objects/xxx.c files of Python should feel at home with Psyco's objects/pxxx.c files. In fact, they are just a rewrite of the Python interpreter into some "meta-C" code useable by the specializer of Psyco. If you gave up while trying to read the code of 0.3.3 please have another look now :-) Thanks, Armin Rigo.

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__getattribute__ should require a string?
by Ka-Ping Yee 04 Dec '01

04 Dec '01

In the current Python, __getattribute__ can be called directly with a non-string, causing much weirdness: >>> print ''.__getattribute__(1) Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'str' object has no attribute ' �*' >>> To avoid this, i've added a simple check to Objects/object.c: diff -c -r2.161 object.c *** object.c 2001/11/04 07:29:31 2.161 --- object.c 2001/12/04 12:46:13 *************** *** 1210,1215 **** --- 1210,1221 ---- descrgetfunc f; PyObject **dictptr; + if (!PyString_Check(name)) { + PyErr_SetString(PyExc_TypeError, + "attribute name must be string"); + return NULL; + } + if (tp->tp_dict == NULL) { if (PyType_Ready(tp) < 0) return NULL; This produces the better behaviour: >>> print ''.__getattribute__(1) Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: attribute name must be string >>> I was about to check in this simple fix -- but then i discovered that it is currently possible to assign attributes with non-string keys: >>> def f(): pass ... >>> f.__getattribute__(1) Traceback (most recent call last): File "<stdin>", line 1, in ? AttributeError: 'function' object has no attribute ' �*' >>> f.__setattr__(1, 1) >>> f.__getattribute__(1) 1 >>> Adding the above check prevents this usage. Is there any reason why people should be allowed to assign and retrieve attributes with non-string names? -- ?!ng

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