[Python-Dev] Floating point test_pow failure on the alpha Debian buildbot
test_pow is failing on the alpha Debian buildbot, complaining that a negative number can't be raised to a fractional power. Now, to work around some bugs in platform implementations of math.fpow(), pow() does its own check to see if the exponent is an integer. The way pow() does that check is to try "iw == floor(iw)", so to see why the exception was being triggered, I put a couple of extra output lines into the test and got: *** Number: 1.2299e+167 *** Floor: 1.2297e+167 Given that the magnitude of the exponent significantly exceeds the precision of an IEEE double, it seems wrong for floor() to be changing the mantissa like that (and, on my machine, and all of the other buildbots, it doesn't). I've added an explicit test for this misbehaviour to test_math so at least the buildbot gives a clearer indication of what's going wrong, but I'm not sure what to do with it beyond that. Cheers, Nick. -- Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia --- http://www.boredomandlaziness.org ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
[Python-Dev] test_asyncore fails intermittently on Darwin
test_asyncore fails intermittently on Darwin in trunk rev 56558; it seems a matter of executing the test too fast and not waiting for the TCP_WAIT state to expire. I think somebody encountered this problem previously with another module (socket_server) and I'm unsure how that was sorted. -- Cheers, Hasan Diwan <[EMAIL PROTECTED]> ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] [OT] Monospaced fonts
Georg Brandl wrote: > I couldn't live without monospaced fonts for > source code. Apart from being easier to read, it is essential for sketches > or things that must be aligned, such as the class schema in SocketServer.py. This just goes to show we're living in the dark ages wrt source code representation. We should be able to write our comments in HTML with embedded SVG diagrams. :-) -- Greg Ewing, Computer Science Dept, +--+ University of Canterbury, | Carpe post meridiem! | Christchurch, New Zealand | (I'm not a morning person.) | [EMAIL PROTECTED] +--+ ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
[EMAIL PROTECTED] wrote: > Me, I find it easier > to read code which is displayed or printed with monospaced fonts. Note, > however, that I've been programming for 30 years. I started with IBM punch > cards, so I might be a bit biased. I normally use monospaced fonts for Python, but in my Think Pascal days I wrote most of my Pascal in Geneva. I thought it actually looked quite nice that way, especially with TP's auto-formatting. It depends a lot on the font, though -- I don't think I'd like to program in Times, for instance. -- Greg Ewing, Computer Science Dept, +--+ University of Canterbury, | Carpe post meridiem! | Christchurch, New Zealand | (I'm not a morning person.) | [EMAIL PROTECTED] +--+ ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
Pete Forman wrote: > Why do programming languages > continue to assume use of a monospaced font? Programming *languages* don't -- I know of no (serious[1]) language that requires a monospaced font in order to work correctly. Even in Python, as long as you don't mix tabs and spaces, indentation still works since it's all at the beginning of a line. Certain *conventions* sometimes used by programmers might require it, but that's a different thing. [1] Brainf**k is an obvious exception. -- Greg Ewing, Computer Science Dept, +--+ University of Canterbury, | Carpe post meridiem! | Christchurch, New Zealand | (I'm not a morning person.) | [EMAIL PROTECTED] +--+ ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] test_asyncore fails intermittently on Darwin
Thanks Hasan, I'll see if I can dig up what they did and make some changes to fix the asyncore tests. Regards, Alan On 7/26/07, Hasan Diwan <[EMAIL PROTECTED]> wrote: > test_asyncore fails intermittently on Darwin in trunk rev 56558; it > seems a matter of executing the test too fast and not waiting for the > TCP_WAIT state to expire. I think somebody encountered this problem > previously with another module (socket_server) and I'm unsure how that > was sorted. > -- > Cheers, > Hasan Diwan <[EMAIL PROTECTED]> > ___ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/alan.mcintyre%40gmail.com > ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
[EMAIL PROTECTED] wrote: > > > Pete> That points towards a way forward. Why do programming languages > Pete> continue to assume use of a monospaced font? It was natural when > Pete> we used punch cards and line printers, but now? Python relies on > Pete> the indentation but could be flexible about other textual > Pete> attributes. > > Nothing in Python assumes anything about fonts. That's all a function of > the text editor you use and your editing preferences. Me, I find it easier > to read code which is displayed or printed with monospaced fonts. Note, > however, that I've been programming for 30 years. I started with IBM punch > cards, so I might be a bit biased. I started in '98, and I also find monospaced fonts easier to read in various circumstances (email, code, shells, etc.). But indeed, Python makes no assumption about fonts. A person could use Wingdings for all Python cares. - Josiah ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
Pete> That points towards a way forward. Why do programming languages Pete> continue to assume use of a monospaced font? It was natural when Pete> we used punch cards and line printers, but now? Python relies on Pete> the indentation but could be flexible about other textual Pete> attributes. Nothing in Python assumes anything about fonts. That's all a function of the text editor you use and your editing preferences. Me, I find it easier to read code which is displayed or printed with monospaced fonts. Note, however, that I've been programming for 30 years. I started with IBM punch cards, so I might be a bit biased. Skip ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
[EMAIL PROTECTED] writes: > I started with IBM punch cards Definitely a character cell format. ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
> The term "French Spacing" is used for two spaces after a period ending > a sentence, for those wishing to do more research. I have not found > any authoritative answer. This phrase sounded to me like one of the slurs the English invented during their various wars with the Dutch and the French (e.g. "Dutch courage"), so I looked into it a bit. The practice of double-spacing after a period was standard even with proportional fonts before the advent of the Linotype machine, the mechanical design of which didn't accommodate it. See http://webword.com/reports/period.html. ``If the [Linotype machine] operator typed two spaces in a row, you had two wedges next to each other, and that tended to gum up the operation. Clients who insisted could be accommodated by typing an en-space followed by a justifier-space, but printers charged extra for it and ridiculed it as 'French Spacing, oo-la-la, you want it all fancy, huh? Well it'll cost ya, bub, and plenty too...' and soon it became unfashionable in the US.'' Bill ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Floating point test_pow failure on the alpha Debian buildbot
[Nick Coghlan] > test_pow is failing on the alpha Debian buildbot, complaining that a > negative number can't be raised to a fractional power. Now, to work > around some bugs in platform implementations of math.fpow(), pow() does > its own check to see if the exponent is an integer. > > The way pow() does that check is to try "iw == floor(iw)", so to see why > the exception was being triggered, I put a couple of extra output lines > into the test and got: > > *** Number: 1.2299e+167 > *** Floor: 1.2297e+167 > > Given that the magnitude of the exponent significantly exceeds the > precision of an IEEE double, it seems wrong for floor() to be changing > the mantissa like that It is wrong -- the machine representation of test_pow's 1.23e167 literal is an exact integer on any current box, and the floor of any exact integer is the integer itself. > (and, on my machine, and all of the other buildbots, it doesn't). > > I've added an explicit test for this misbehaviour to test_math so at > least the buildbot gives a clearer indication of what's going wrong, but > I'm not sure what to do with it beyond that. This isn't Python's problem -- a bug report should be opened against the platform C's implementation of floor(), and the test /should/ fail in Python so long as the platform floor() remains broken. ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
[Python-Dev] [OT] Monospaced fonts
[EMAIL PROTECTED] schrieb: > Pete> That points towards a way forward. Why do programming languages > Pete> continue to assume use of a monospaced font? It was natural when > Pete> we used punch cards and line printers, but now? Python relies on > Pete> the indentation but could be flexible about other textual > Pete> attributes. > > Nothing in Python assumes anything about fonts. That's all a function of > the text editor you use and your editing preferences. Me, I find it easier > to read code which is displayed or printed with monospaced fonts. Note, > however, that I've been programming for 30 years. I started with IBM punch > cards, so I might be a bit biased. Though being notably younger ;), I couldn't live without monospaced fonts for source code. Apart from being easier to read, it is essential for sketches or things that must be aligned, such as the class schema in SocketServer.py. Georg -- Thus spake the Lord: Thou shalt indent with four spaces. No more, no less. Four shall be the number of spaces thou shalt indent, and the number of thy indenting shall be four. Eight shalt thou not indent, nor either indent thou two, excepting that thou then proceed to four. Tabs are right out. ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] Two spaces or one?
The term "French Spacing" is used for two spaces after a period ending a sentence, for those wishing to do more research. I have not found any authoritative answer. The balance has been towards two spaces when using a monospaced font. That points towards a way forward. Why do programming languages continue to assume use of a monospaced font? It was natural when we used punch cards and line printers, but now? Python relies on the indentation but could be flexible about other textual attributes. -- Pete Forman-./\.- Disclaimer: This post is originated WesternGeco -./\.- by myself and does not represent [EMAIL PROTECTED]-./\.- the opinion of Schlumberger or http://petef.port5.com -./\.- WesternGeco. ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
[Python-Dev] Weekly Python Patch/Bug Summary
Patch / Bug Summary ___ Patches : 399 open ( +5) / 3836 closed ( +9) / 4235 total (+14) Bugs: 1056 open (+10) / 6776 closed ( +3) / 7832 total (+13) RFE : 263 open ( +1) / 294 closed ( +1) / 557 total ( +2) New / Reopened Patches __ utilize 2.5 try/except/finally in contextlib (2007-07-19) http://python.org/sf/1757118 opened by Philip Jenvey Fix ptcp154 encoding cyrillic_asian alias (2007-07-19) http://python.org/sf/1757126 opened by Philip Jenvey Add support for seeking/writing beyond EOF to io.BytesIO (2007-07-20) CLOSED http://python.org/sf/1757683 opened by Alexandre Vassalotti struni: make test_ucn pass (2007-07-20) CLOSED http://python.org/sf/1757758 opened by Alexandre Vassalotti struni: fix str/bytes errors for test_oldmailbox (2007-07-20) CLOSED http://python.org/sf/1757774 opened by Alexandre Vassalotti setuptools support for bazaar vcs (2007-07-20) CLOSED http://python.org/sf/1757782 opened by Barry A. Warsaw struni: make test_mailbox and test_old_mailbox pass (2007-07-20) CLOSED http://python.org/sf/1757839 opened by Alexandre Vassalotti struni: Fix test_macostools (2007-07-22) CLOSED http://python.org/sf/1758570 opened by Jeffrey Yasskin pyexpat unit tests - str/uni branch (2007-07-23) CLOSED http://python.org/sf/1759016 opened by Joe Gregorio clean up Solaris port and allow C99 extension modules (2007-07-23) http://python.org/sf/1759169 opened by Zooko O'Whielacronx struni pulldom: Don't use 'types' to check strings (2007-07-24) http://python.org/sf/1759922 opened by Alexandre Vassalotti Cross Compiling Python (2007-07-25) http://python.org/sf/1760089 opened by Yegnesh ZipFile.write fails with bad modification time (2007-07-25) http://python.org/sf/1760357 opened by Grzegorz Adam Hankiewicz struni: Fix test_aepack by converting 4cc's to bytes (2007-07-26) http://python.org/sf/1761465 opened by Jeffrey Yasskin Patches Closed __ Show Location of Unicode Escape Errors (2007-07-18) http://python.org/sf/1755885 closed by gvanrossum Add support for seeking/writing beyond EOF to io.BytesIO (2007-07-20) http://python.org/sf/1757683 closed by gvanrossum struni: make test_ucn pass (2007-07-20) http://python.org/sf/1757758 closed by gvanrossum struni: fix str/bytes errors for test_oldmailbox (2007-07-20) http://python.org/sf/1757774 closed by avassalotti setuptools support for bazaar vcs (2007-07-20) http://python.org/sf/1757782 closed by pje struni: make test_mailbox and test_old_mailbox pass (2007-07-20) http://python.org/sf/1757839 closed by gvanrossum PEP 3123 implementation (2007-05-13) http://python.org/sf/1718153 closed by loewis struni: Fix test_macostools (2007-07-22) http://python.org/sf/1758570 closed by gvanrossum pyexpat unit tests - str/uni branch (2007-07-23) http://python.org/sf/1759016 closed by gvanrossum New / Reopened Bugs ___ Python 2.5.1 fails to build on AIX (2007-07-18) http://python.org/sf/1756343 opened by Tom Epperly reference count discrepancy, PyErr_Print vs. PyErr_Clear (2007-07-18) http://python.org/sf/1756389 opened by Jon Klein IDLE + BeautifulSoup = Error (2007-07-19) http://python.org/sf/1757057 opened by Tal Einat Pickle fails on BeautifulSoup's navigableString instances (2007-07-19) http://python.org/sf/1757062 opened by Tal Einat Zipfile robustness (2007-07-19) http://python.org/sf/1757072 opened by Chris Mellon Crash in PyObject_Malloc (2007-07-21) http://python.org/sf/1758146 opened by Tim Bishop Documentation of descriptors needs more detail (2007-07-22) http://python.org/sf/1758696 opened by L. Peter Deutsch unicode(None,charset) raise TypeError (2007-07-23) http://python.org/sf/1758804 opened by Guillaume subprocess.call fails with unicode strings in command line (2007-07-24) http://python.org/sf/1759845 opened by Matt poll() on cygwin sometimes fails [PATCH] (2007-07-24) http://python.org/sf/1759997 opened by Brian Warner No docs for list comparison (2007-07-25) http://python.org/sf/1760423 opened by Kent Johnson logging.FileHandler may throw exception in flush() (2007-07-25) http://python.org/sf/1760556 opened by J Livingston pickle - cannot unpickle circular deps with custom __hash__ (2007-07-26) http://python.org/sf/1761028 opened by Martin Süßkraut Bugs Closed ___ struni: help() is broken (2007-07-11) http://python.org/sf/1751932 closed by kbk Docstring for codecs.lookup is incorrect (2007-07-15) http://python.org/sf/1754453 closed by doerwalter New / Reopened RFE __ splice() function for itertools (2007-07-20) CLOSED http://python.org/sf/1757395 opened by Alexander Dutton Allow
[Python-Dev] interaction between locals, builtins and except clause
Porting to Py3K, I modified a function like the followin, using a trick for it working in Py2.x . def __iter__(self): if self == _mpi.INFO_NULL: return try:range = xrange except: pass nkeys = _mpi.info_get_nkeys(self) for nthkey in range(nkeys): yield _mpi.info_get_nthkey(self, nthkey) However, I've got in my unittests (running with py3k) ERROR: testPyMethods (__main__.TestInfo) -- Traceback (most recent call last): File "tests/unittest/test_info.py", line 123, in testPyMethods for key in INFO: File "/u/dalcinl/lib/python/mpi4py/MPI.py", line 937, in __iter__ for nthkey in range(nkeys): UnboundLocalError: local variable 'range' referenced before assignment I am not completelly sure if this is expected (it is, regarding implementation, but perhaps not regarding Python as a language), so I post this for your consideration. -- Lisandro Dalcín --- Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC) Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) PTLC - Güemes 3450, (3000) Santa Fe, Argentina Tel/Fax: +54-(0)342-451.1594 ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] interaction between locals, builtins and except clause
Lisandro Dalcin schrieb: > Porting to Py3K, I modified a function like the followin, using a > trick for it working in Py2.x . > > def __iter__(self): > if self == _mpi.INFO_NULL: > return > try:range = xrange > except: pass > nkeys = _mpi.info_get_nkeys(self) > for nthkey in range(nkeys): > yield _mpi.info_get_nthkey(self, nthkey) > > However, I've got in my unittests (running with py3k) > > ERROR: testPyMethods (__main__.TestInfo) > -- > Traceback (most recent call last): > File "tests/unittest/test_info.py", line 123, in testPyMethods > for key in INFO: > File "/u/dalcinl/lib/python/mpi4py/MPI.py", line 937, in __iter__ > for nthkey in range(nkeys): > UnboundLocalError: local variable 'range' referenced before assignment > > > I am not completelly sure if this is expected (it is, regarding > implementation, but perhaps not regarding Python as a language), so > I post this for your consideration. Yes, this is expected. By an assignment to range anywhere in a function scope, the name is marked as a local and won't ever be looked up in the global namespace. I'd move the range = xrange part at the module top, or just bring the 2.x version in a state where one run of 2to3 produces a working 3.0 version. HTH, Georg -- Thus spake the Lord: Thou shalt indent with four spaces. No more, no less. Four shall be the number of spaces thou shalt indent, and the number of thy indenting shall be four. Eight shalt thou not indent, nor either indent thou two, excepting that thou then proceed to four. Tabs are right out. ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
Re: [Python-Dev] [OT] Monospaced fonts
Greg Ewing schrieb: > Georg Brandl wrote: >> I couldn't live without monospaced fonts for >> source code. Apart from being easier to read, it is essential for sketches >> or things that must be aligned, such as the class schema in SocketServer.py. > > This just goes to show we're living in the dark ages wrt source code > representation. We should be able to write our comments in HTML with > embedded SVG diagrams. :-) PowerPoint, coding edition? Georg -- Thus spake the Lord: Thou shalt indent with four spaces. No more, no less. Four shall be the number of spaces thou shalt indent, and the number of thy indenting shall be four. Eight shalt thou not indent, nor either indent thou two, excepting that thou then proceed to four. Tabs are right out. ___ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
