Mailman 3 April 2004 - Python-Dev

Small issues in gettext support
by Gustavo Niemeyer 29 Apr '04

29 Apr '04

Hello folks, I've been working with gettext support in Python, and found some issues I'd like to discuss with you. First, I've noticed that there's a difference in the internal implementation of gettext and GNU gettext regarding the returned encoding on non-unicode strings. Notice the difference in the result of this code: import gettext import locale locale.setlocale(locale.LC_ALL, "") locale.textdomain("apt-cdrom-registry") gettext.textdomain("apt-cdrom-registry") print locale.gettext("Choose the available CDROMs from the list below") print gettext.gettext("Choose the available CDROMs from the list below") This has shown the following: Escolha os CDROMs disponíves na lista abaixo Escolha os CDROMs disponÃves na lista abaixo The reason for this difference is clear: GNU gettext defaults to the current locale when returning encoded strings, while gettext.py returns strings in the encoding used in the .mo file. The fix is simply changing the following code # Encode the Unicode tmsg back to an 8-bit string, if possible if self._charset: return tmsg.encode(self._charset) to use the system encoding (sys.getdefaultencoding()) instead of self._charset. Regarding a similar issue, I've also noticed that we're currently missing bind_textdomain_codeset() support. This function changes the codeset used to return the translated strings. So, I'd like to implement the following changes: - Change the default codeset used by gettext.py in functions returning an encoded string to match the system encoding. - Introduce bind_textdomain_codeset() in locale. - Introduce bind_textdomain_codeset() in gettext.py implementing an equivalent functionality. Comments? -- Gustavo Niemeyer http://niemeyer.net

3 11

Subtyping mutable and immutable built-in types
by Edward C. Jones 29 Apr '04

29 Apr '04

#! /usr/bin/env python # According to # http://www.cafepy.com/articles/python_attributes_and_methods/ch03s02.html # the correct ways to subtype mutable and immutable built-in types are # Mutable class MyList(list): def __init__(self, itr): list.__init__(self, [int(x) for x in itr]) # Immutable class MyTuple(tuple): def __new__(typ, itr): return tuple.__new__(typ, [int(x) for x in itr]) # This doesn't work. class MyTuple(tuple): def __init__(self, itr): tuple.__init__(self, [int(x) for x in itr]) # A variant is class MyList(list): def __init__(self, *args): list.__init__(self, args) class MyTuple(tuple): def __new__(typ, *args): return tuple.__new__(typ, args) # This doesn't work. class MyTuple2(tuple): def __init__(self, *args): tuple.__init__(self, args) print MyList(1, 2) print MyTuple(1, 2) print MyTuple2(1, 2) # This warty stuff needs documenting.

1 0

PEP 754
by Ivan R. Judson 28 Apr '04

28 Apr '04

What's needs to be done to possibly get PEP754 (fpconst) to move ahead and perhaps go into 2.4? --Ivan

6 5

libjit - looks interesting
by Neal D. Becker 27 Apr '04

27 Apr '04

A free jit library. Might be useful for Python. Anyone looking at this? http://www.southern-storm.com.au/libjit.html

2 1

Need help with patch
by Thomas Heller 27 Apr '04

27 Apr '04

I would appreciate very much if someone can at least proofread the patch that I posted to http://python.org/sf/876278. Even better would be if users of modulefinder would try this with really complicated applications. I'm not sure if this should go into the 23-maintanance branch. Thomas

1 0

Weekly Python Bug/Patch Summary
by Kurt B. Kaiser 26 Apr '04

26 Apr '04

Patch / Bug Summary ___________________ Patches : 270 open ( +5) / 2366 closed ( +1) / 2636 total ( +6) Bugs : 754 open ( +2) / 3993 closed (+10) / 4747 total (+12) RFE : 133 open ( -1) / 124 closed ( +0) / 257 total ( -1) New / Reopened Patches ______________________ CodeContext - an extension to show you where you are (2004-04-16) CLOSED http://python.org/sf/936169 reopened by noamr Explain 'in' keyword as it is first used (2004-04-22) http://python.org/sf/940026 opened by Gerrit Holl Replace if/elif chain with dispatch pattern in sre_compile (2004-04-23) http://python.org/sf/941071 opened by Raymond Hettinger Allow any encodings other than latin-1 in interactive interp (2004-04-24) http://python.org/sf/941229 opened by Hye-Shik Chang Minimal fix for bug 940578 (glob.glob on broken symlinks) (2004-04-24) http://python.org/sf/941486 opened by Cherniavsky Beni PEP309 Partial implementation (2004-04-26) http://python.org/sf/941881 opened by Hye-Shik Chang Patches Closed ______________ CodeContext - an extension to show you where you are (2004-04-16) http://python.org/sf/936169 closed by kbk Py_INCREF/DECREF available as macros only (2004-04-20) http://python.org/sf/938302 closed by theller New / Reopened Bugs ___________________ message.as_string hoses headers (2004-04-20) CLOSED http://python.org/sf/938890 opened by Carl Karsten cPickle.Pickler: in "list" mode, no way to set protocol (2004-04-22) http://python.org/sf/939395 opened by John Belmonte Building python 2.3.3 RPM on Mandrake 9.2. fails (2004-04-22) http://python.org/sf/939699 opened by fabien wahl Logging failes for rotating file log (during rollOver) (2004-04-22) http://python.org/sf/939836 opened by smeyers2002 xml parser bug (2004-04-22) CLOSED http://python.org/sf/940263 opened by David Tefft pydoc.Helper.help() ignores input/output init parameters (2004-04-22) http://python.org/sf/940286 opened by Maxim Krikun string.lstrip problem with '_' string (2004-04-22) CLOSED http://python.org/sf/940316 opened by Arnold Python crashes with bus error on sparc64. (2004-04-22) http://python.org/sf/940354 opened by Generic Player misbehaviour with map / lambda / isdigit() (2004-04-23) CLOSED http://python.org/sf/940522 opened by dreary glob.glob inconsistent about broken symlinks (2004-04-23) http://python.org/sf/940578 opened by Cherniavsky Beni section 5.10: 'not' returns boolean, not int (2004-04-23) CLOSED http://python.org/sf/940579 opened by Jon Ashley List with Canvas.create_line Option arrow=LAST Broke (2004-04-24) http://python.org/sf/941262 opened by Brian Brooks AIX shared library fix (2004-04-24) http://python.org/sf/941346 opened by Dick Dunbar Bugs Closed ___________ Random.choice doesn't work with sets. (2004-04-17) http://python.org/sf/936988 closed by rhettinger minidom.py writes TEXT_NODE wrong (2004-04-18) http://python.org/sf/937282 closed by loewis re.sub on u'' gives NON-unicode '' (2004-03-31) http://python.org/sf/926075 closed by perky message.as_string hoses headers (2004-04-20) http://python.org/sf/938890 closed by carlk message.as_string hoses headers (2004-04-20) http://python.org/sf/938890 closed by tim_one Shelve slow after 7/8000 key (2004-01-21) http://python.org/sf/881522 closed by tim_one Slicing changes item-attributes of an instance of a UserList (2004-04-19) http://python.org/sf/937700 closed by hflori xml parser bug (2004-04-22) http://python.org/sf/940263 closed by loewis string.lstrip problem with '_' string (2004-04-22) http://python.org/sf/940316 closed by rhettinger misbehaviour with map / lambda / isdigit() (2004-04-23) http://python.org/sf/940522 closed by tim_one section 5.10: 'not' returns boolean, not int (2004-04-23) http://python.org/sf/940579 closed by rhettinger

1 0

today's pointless, yet slightly terrifying, factoid(s)
by Anthony Baxter 26 Apr '04

26 Apr '04

I received some email about some _very_ old pages (no longer existing) I put up about Python's internals. In 1996. This made me stop and think 'bloody hell, how long _have_ I been doing this?' cvs ann Misc/ACKS is slightly terrifying, saying at least 1994. A teeny tiny sort script later, and this list follows. Note that it's obviously not representative of anything at all, but may serve to terrify others, as it terrified me, as to the sheer amount of their life that they've wasted on Python <wink> disclaimer: absolutely representative of nothing at all, not to be taken internally, if pain persists see a doctor Anthony 1.1 (guido 26-Jan-94): Mark Anacker 1.1 (guido 26-Jan-94): Jan-Hein B"uhrman 1.1 (guido 26-Jan-94): Anthony Baxter 1.1 (guido 26-Jan-94): Donald Beaudry 1.1 (guido 26-Jan-94): Eric Beser 1.1 (guido 26-Jan-94): Stephen Bevan 1.1 (guido 26-Jan-94): Peter Bosch 1.1 (guido 26-Jan-94): Terrence Brannon 1.1 (guido 26-Jan-94): Erik de Bueger 1.1 (guido 26-Jan-94): Dick Bulterman 1.1 (guido 26-Jan-94): David Chaum 1.1 (guido 26-Jan-94): Jonathan Dasteel 1.1 (guido 26-Jan-94): John DeGood 1.1 (guido 26-Jan-94): Roger Dev 1.1 (guido 26-Jan-94): Stoffel Erasmus 1.1 (guido 26-Jan-94): Niels Ferguson 1.1 (guido 26-Jan-94): Michael Guravage 1.1 (guido 26-Jan-94): Paul ten Hagen 1.1 (guido 26-Jan-94): Lynda Hardman 1.1 (guido 26-Jan-94): Ivan Herman 1.1 (guido 26-Jan-94): Chris Hoffman 1.1 (guido 26-Jan-94): Philip Homburg 1.1 (guido 26-Jan-94): Jack Jansen 1.1 (guido 26-Jan-94): Bill Janssen 1.1 (guido 26-Jan-94): Drew Jenkins 1.1 (guido 26-Jan-94): Lou Kates 1.1 (guido 26-Jan-94): Robert van Liere 1.1 (guido 26-Jan-94): Steve Majewski 1.1 (guido 26-Jan-94): Lambert Meertens 1.1 (guido 26-Jan-94): Steven Miale 1.1 (guido 26-Jan-94): Doug Moen 1.1 (guido 26-Jan-94): Sape Mullender 1.1 (guido 26-Jan-94): Sjoerd Mullender 1.1 (guido 26-Jan-94): George Neville-Neil 1.1 (guido 26-Jan-94): Randy Pausch 1.1 (guido 26-Jan-94): Marcel van der Peijl 1.1 (guido 26-Jan-94): Steven Pemberton 1.1 (guido 26-Jan-94): Tim Peters 1.1 (guido 26-Jan-94): John Redford 1.1 (guido 26-Jan-94): Timothy Roscoe 1.1 (guido 26-Jan-94): Kevin Samborn 1.1 (guido 26-Jan-94): Fred Sells 1.1 (guido 26-Jan-94): Denis Severson 1.1 (guido 26-Jan-94): Michael Shiplett 1.1 (guido 26-Jan-94): Paul Sijben 1.1 (guido 26-Jan-94): Dirk Soede 1.1 (guido 26-Jan-94): Per Spilling 1.1 (guido 26-Jan-94): Quentin Stafford-Fraser 1.1 (guido 26-Jan-94): Tracy Tims 1.1 (guido 26-Jan-94): Bennett Todd 1.1 (guido 26-Jan-94): Jaap Vermeulen 1.1 (guido 26-Jan-94): Dik Winter 1.2 (guido 26-Jan-94): Amrit Prem 1.3 (guido 14-Apr-94): Jurjen Bos 1.3 (guido 14-Apr-94): Stefan Esser 1.3 (guido 14-Apr-94): Rycharde Hawkes 1.3 (guido 14-Apr-94): Steve Kirsch 1.3 (guido 14-Apr-94): Mark Lutz 1.3 (guido 14-Apr-94): Jim Roskind 1.4 (guido 04-May-94): Adrian Phillips 1.5 (guido 04-May-94): Andy Bensky 1.6 (guido 23-May-94): Rickard Westman 1.7 (guido 14-Jul-94): Tommy Burnette 1.7 (guido 14-Jul-94): Simon Johnston 1.7 (guido 14-Jul-94): William Lewis 1.7 (guido 14-Jul-94): Richard Walker 1.8 (guido 05-Aug-94): Andrew Kuchling 1.8 (guido 05-Aug-94): John Tromp 1.9 (guido 30-Aug-94): Ulf Bartelt 1.10 (guido 14-Sep-94): Michael Scharf 1.11 (guido 06-Oct-94): Anne Lord 1.11 (guido 06-Oct-94): Skip Montanaro 1.12 (guido 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Craig 1.194 (gvanross 12-Aug-02): Cesar Douady 1.194 (gvanross 12-Aug-02): Jiba 1.195 (loewis 14-Aug-02): Hisao Suzuki 1.196 (rhetting 18-Aug-02): Steve Purcell 1.197 (jackjans 19-Aug-02): Michael J. Barber 1.197 (jackjans 19-Aug-02): Chris Barker 1.197 (jackjans 19-Aug-02): Bill Bedford 1.197 (jackjans 19-Aug-02): Erik van Blokland 1.197 (jackjans 19-Aug-02): Tom Bridgman 1.197 (jackjans 19-Aug-02): Daniel Brotsky 1.197 (jackjans 19-Aug-02): Dean Draayer 1.197 (jackjans 19-Aug-02): Russell Finn 1.197 (jackjans 19-Aug-02): Nitin Ganatra 1.197 (jackjans 19-Aug-02): Tony Ingraldi 1.197 (jackjans 19-Aug-02): Tattoo Mabonzo K. 1.197 (jackjans 19-Aug-02): Jacob Kaplan-Moss 1.197 (jackjans 19-Aug-02): Luc Lefebvre 1.197 (jackjans 19-Aug-02): Tom Loredo 1.197 (jackjans 19-Aug-02): Pascal Oberndoerfer 1.197 (jackjans 19-Aug-02): Russel Owen 1.197 (jackjans 19-Aug-02): M. 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Kaiser 1.240 (rhetting 28-Jun-03): Steven Taschuk 1.241 (rhetting 29-Jun-03): Bob Halley 1.242 (jhylton 17-Jul-03): Vincent Delft 1.243 (jhylton 17-Jul-03): Gavrie Philipson 1.244 (akuchlin 13-Aug-03): Joerg Lehmann 1.245 (rhetting 01-Sep-03): George Yoshida 1.246 (rhetting 01-Sep-03): Andrew Gaul 1.247 (rhetting 02-Sep-03): Alexander Belopolsky 1.248 (gvanross 08-Oct-03): Wojtek Walczak 1.249 (bcannon 12-Oct-03): Michael Stone 1.251 (bcannon 14-Oct-03): Bjorn Pettersen 1.252 (loewis 31-Oct-03): Hector Urtubia 1.253 (gvanross 10-Nov-03): Iustin Pop 1.254 (loewis 10-Nov-03): Yves Dionne 1.257 (rhetting 05-Jan-04): Dmitry Vasiliev 1.258 (loewis 31-Jan-04): Frederik Fix 1.259 (rhetting 08-Feb-04): Mike Pall 1.260 (rhetting 04-Mar-04): Bob Ippolito 1.261 (mondrago 23-Mar-04): Nick Bastin

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Re: generator expressions
by Peter Harris 24 Apr '04

24 Apr '04

Michael Chermside wrote: >How do we go about asking >people to try it out (is a mention by Guido on comp.lang.python >sufficient)? > >-- Michael Chermside > > > I'll play with generator expressions gladly. I have been using list comprehensions like mad, even in cases where I suspect a generator would be better. Also, I have a few uses of generators that might look clearer as generator expressions. So I'd be more than happy to make a test version of my current projects using generator expressions, just to see when they can make the code clearer, and whether there is anything about the semantics that trips me up too easily. I don't think my data sets are going to be big enough to test performance, just usability. Now, if someone checks in the implementation of PEP309 too <hint>, I would be as happy as a biscuit... Peter Harris

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Re: Decimal data type issues
by Jewett, Jim J 23 Apr '04

23 Apr '04

Batista, Facundo: > can you trust that the user that uses the > method from context is aware of binary float traps? If they are explicitly setting a context, I think it is reasonable to assume that. The problem case is when they just use the default. inputcontext.Decimal(1.1) has made an explicit request for specific handling. Decimal(1.1) has not indicated any awareness. The catch is that we don't want "just make another context" to become such an idiom for floats that people do it without knowing why. Perhaps the Context.Decimal.__init__ could delegate to the raise function unless/until the user had set an attribute of approximate_float_ok = True. -jJ

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RE: [Python-Dev] Re: Decimal data type issues
by Moore, Paul 23 Apr '04

23 Apr '04

From: Tim Delaney > I think we probably want a supplemental PEP for upgrading the `math` > module plus appropriate builtins (like round) to handle Decimal. A > quick scan through the docs reveals While I'm sure the numerical properties are iffy, just how bad is using binary FP as an intermediate when calculating transcendental functions for Decimal values? I'm thinking of something like d = Decimal(...) f = math.sin(float(d)) # Now convert back using exact float->Decimal, followed by # context-respecting "+" operation result = +Decimal.from_float(f) I suspect that this is adequate for "casual" users. And I'm not at all sure that the target audience for a Decimal type really cares about transcendental functions... (I think that boils down to claiming YAGNI, at least in the first instance). Paul. __________________________________________________________________________ This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Atos Origin group liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted. __________________________________________________________________________

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