🌐 Mailman 3 December 2009 - Python-list - python.org

Re: python and vc numbers
by Gregory Ewing Dec. 1, 2009

Dec. 1, 2009

Daniel Dalton wrote: > I can't find a reliable way to > determine the current console number with python or any bash tool. When > I say console number, I mean the actual console number, not screen > window or device it is sending to or whatever. You may be able to tell by looking at the DISPLAY environment variable. Usually it has a form like localhost:X.Y where X and Y are numbers identifying the display device and screen. -- Greg

1 0

ANN: GMPY 1.11rc1 is available
by casevh Dec. 1, 2009

Dec. 1, 2009

Everyone, I'm pleased to annouce that a new version of GMPY is available. GMPY is a wrapper for the MPIR or GMP multiple-precision arithmetic library. GMPY 1.11rc1 is available for download from: http://code.google.com/p/gmpy/ In addition to support for Python 3.x, there are several new features in this release: - Even faster conversion to/from Python longs. - Performance improvements by reducing function overhead. - Performance improvements by improved caching. - Support for cdivmod, fdivmod, and tdivmod. - Unicode strings are accepted on Python 2.x and 3.x. - Fixed regression in GMPY 1.10 where True/False were no longer recognized. Comments on provided binaries The 32-bit Windows installers were compiled with MinGW32 using MPIR 1.3.0rc3 and will automatically recognize the CPU type and use code optimized for the CPU at runtime. The 64-bit Windows installers were compiled Microsoft's SDK compilers using MPRI 1.3.0rc3. Detailed instructions are included if you want to compile your own binary. Future plans On releasing the GIL: I have compared releasing the GIL versus the multiprocessing module and the multiprocessing module offers better and more predictable performance for embarrassingly parallel tasks than releasing the GIL. If there are requests, I can add a compile- time option to enable threading support but it is unlikely to become the default. On mutable integers: The performance advantages of mutable integers appears to be 20% to 30% for some operations. I plan to add a new mutable integer type in the next release of GMPY. If you want to experiment with mutable integers now, GMPY can be compiled with mutable version of the standard 'mpz' type. Please see the file "mutable_mpz.txt" for more information. Please report any issues! casevh

4 3

python logging filters
by Grimsqueaker Dec. 1, 2009

Dec. 1, 2009

I have found some strange behaviour when using the Python 2.6 logging module, maybe someone here can explain what's happening? When I add a Filter to a Handler, everything works as expected (ie. all messages sent from Loggers below the Filter's level are allowed through), but when I add the Filter directly on to the Logger, only that Logger is blocked, regardless of the contents of the Filter. The code below will show the expected and desired output when run. To see the inexplicable output, use the commented line in place of the line above it. code: import logging root_logger = logging.getLogger() loggerA = logging.getLogger('A') loggerA1 = logging.getLogger('A.1') loggerA2 = logging.getLogger('A.2') loggerA11 = logging.getLogger('A.1.1') loggerA12 = logging.getLogger('A.1.2') loggerB = logging.getLogger('B') loggerB1 = logging.getLogger('B.1') loggerB11 = logging.getLogger('B.1.1') root_logger.addHandler(logging.StreamHandler()) f = logging.Filter(loggerB.name) root_logger.handlers[0].addFilter(f) #root_logger.addFilter(f) for l in [root_logger, loggerA, loggerB, loggerA1, loggerA2, loggerB1, loggerA11, loggerA12, loggerB11]: l.critical(l.name) correct output: B B.1 B.1.1 weird output: A B A.1 A.2 B.1 A.1.1 A.1.2 B.1.1 Thanks

2 8

Re: Variables with cross-module usage
by Lie Ryan Dec. 1, 2009

Dec. 1, 2009

On 12/1/2009 7:51 AM, Terry Reedy wrote: >> In everyday life and natural languages, a single name can be used to >> refer to multiple objects just by context without referring any >> namespace. > > Namespace are contexts. They were (re)invented in programming just to > make it easier to have single name could refer to different objects -- > in different contexts. Names bound within a function are interpreted as > being within the default local context without explicitly referring to > it. Indeed, one cannot explicitly refer to the local namespace of > functions, only to a dict copy thereof. Let's stop with the silly analogies. > > Let's not start making analogism between nature and silicon. > > There are several things wrong with this. > > You meant 'analogies'. No, I meant "analogism". My spellchecker lined that red, but I know what I meant. Let me define this word, which apparently is not (at least yet) in the dictionary: - analogism: the way of thinking that analogy must be perfectly similar to the "real thing" in every single way, to the point of making grand and complex story that is even more complicated than the "real thing" itself. > I did not go into that counterclaim, but indeed, many people who program > in C, for instance, use C names as if they were object names instead of > location names (or location,increment tuple names). Sometimes they even > forget that they are really just location names. One too-common result > of that confusion has been buffer overruns and virus programs that > exploit them. These are impossible in Python. "address names" and "object names", those are a good definition; stop at that. Any more layers of analogies, with boxes, with strings, with how human uses "name" in social life, or with how snakes align themselves with stars are much less useful than just learning how the "name" itself behave. Let's stop teaching with excessive analogies, they just provide layers and layers of thinking that would confuse people when the analogy doesn't match the "real thing". Just learn how they behave, directly. Analogy are fine to describe when first explaining how roughly something works, but don't expect things to be the same down to the details; and worse, don't make more analogies to cover up for the points the previous analogy doesn't cover. Just stop the "analogism" [1]! [1] there I used the word again.

1 0

Re: Bored.
by John Bokma Dec. 1, 2009

Dec. 1, 2009

Stef Mientki <stef.mientki(a)gmail.com> wrote: > There's also a Python site, were projects are submitted that needs > something ( some even pay a little), > but I can't remember where it is :-( OP: A Python program to find it :D John

2 1

How to prevent re.split() from removing part of string
by Jeremy Dec. 1, 2009

Dec. 1, 2009

I am using re.split to... well, split a string into sections. I want to split when, following a new line, there are 4 or fewer spaces. The pattern I use is: sections = re.split('\n\s{,4}[^\s]', lineoftext) This splits appropriately but I lose the character matched by [^s]. I know I can put parentheses around [^s] and keep the matched character, but the character is placed in it's own element of the list instead of with the rest of the lineoftext. Does anyone know how I can accomplish this without losing the matched character? Thanks, Jeremy

2 1