#5994: singular.version() yields an error when first called, has no doctest, and
has a strange output imo
------------------------+---------------------------------------------------
Reporter: SimonKing | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.0
Component: interfaces | Keywords: singular version
------------------------+---------------------------------------------------
First of all, {{{singular.version()}}} does not work. When one starts sage
and calls it, there is an error:
{{{
----------------------------------------------------------------------
| Sage Version 3.4.1, Release Date: 2009-04-21 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: singular.version()
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (795, 0))
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
/home/SimonKing/.sage/temp/sage.math.washington.edu/10897/_home_SimonKing__sage_init_sage_0.py
in <module>()
/usr/local/sage/local/lib/python2.5/site-
packages/sage/interfaces/singular.pyc in version(self)
1012 EXAMPLES:
1013 """
-> 1014 return singular_version()
1015
1016 def _function_class(self):
/usr/local/sage/local/lib/python2.5/site-
packages/sage/interfaces/singular.pyc in singular_version()
1807 EXAMPLES:
1808 """
-> 1809 return singular.eval('system("--version");')
1810
1811
/usr/local/sage/local/lib/python2.5/site-
packages/sage/interfaces/singular.pyc in eval(self, x, allow_semicolon,
strip, **kwds)
541
542 if s.find("error") != -1 or s.find("Segment fault") != -1:
--> 543 raise RuntimeError, 'Singular error:\n%s'%s
544
545 if get_verbose() > 0:
RuntimeError: Singular error:
? cannot open `help.cnf`
Singular for x86_64-Linux version 3-0-4 (3044-2009031122) Mar 11 2009
22:29:08
with
factory(@(#) factoryVersion = 3.0.4),libfac(3.0.4,Mar 2008),
GMP(4.2),NTL(5.4.2),static readline,Plural,DBM,
namespaces,dynamic modules,dynamic
p_Procs,OM_CHECK=0,OM_TRACK=0,random=1241602325
CC= gcc -O3 -g -fPIC -pipe -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux
-DHAVE_CONFIG_H,
CXX= g++ -O3 -g -fPIC -pipe -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux
-DHAVE_CONFIG_H (4.2.4 (Ubuntu 4.2.4-1ubuntu3))
argv[0] : Singular-3-0-4
SearchPath: /usr/local/sage/local/LIB
Singular : /usr/local/sage/local/bin/Singular-3-0-4
BinDir : /usr/local/sage/local/bin
RootDir : /usr/local/sage/local
DefaultDir: /usr/local/sage/local
InfoFile :
IdxFile :
HtmlDir :
ManualUrl : http://www.singular.uni-kl.de/Manual/3-0-4
ExDir :
Path :
/usr/local/sage/local/bin:/usr/local/sage/local/polymake/bin:/usr/local/sage:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
EmacsDir :
Available HelpBrowsers: dummy, emacs,
Current HelpBrowser: dummy
? error occurred in STDIN line 3: `system("--version");`
}}}
Secondly, neither {{{singular.version}}} nor {{{singular_version}}} have
doc tests.
Thirdly, if it is called again, it kind of works:
{{{
sage: singular.version()
'Singular for x86_64-Linux version 3-0-4 (3044-2009031122) Mar 11 2009
22:29:08\nwith\n\tfactory(@(#) factoryVersion = 3.0.4),libfac(3.0.4,Mar
2008),\n\tGMP(4.2),NTL(5.4.2),static
readline,Plural,DBM,\n\tnamespaces,dynamic modules,dynamic
p_Procs,OM_CHECK=0,OM_TRACK=0,random=1241602325\n\tCC= gcc -O3 -g -fPIC
-pipe -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux -DHAVE_CONFIG_H,\n\tCXX= g++ -O3
-g -fPIC -pipe -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux -DHAVE_CONFIG_H (4.2.4
(Ubuntu 4.2.4-1ubuntu3))\nargv[0]
:\tSingular-3-0-4\nSearchPath:\t/usr/local/sage/local/LIB\nSingular
:\t/usr/local/sage/local/bin/Singular-3-0-4\nBinDir
:\t/usr/local/sage/local/bin\nRootDir
:\t/usr/local/sage/local\nDefaultDir:\t/usr/local/sage/local\nInfoFile
:\t\nIdxFile :\t\nHtmlDir :\t\nManualUrl :\thttp://www.singular.uni-
kl.de/Manual/3-0-4\nExDir :\t\nPath
:\t/usr/local/sage/local/bin:/usr/local/sage/local/polymake/bin:/usr/local/sage:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games\nEmacsDir
:\t\nAvailable HelpBrowsers: dummy, emacs, \nCurrent HelpBrowser: dummy '
}}}
Finally, I believe that the output of {{{singular.version}}} is nasty. If
I ask for the version of Singular, I expect to get, say, a tuple of
integers, for example:
{{{
sage: def my_singular_version():
....: return tuple([Integer(x) for x in
singular.eval('system("version")')])
....:
sage: my_singular_version()
(3, 0, 4, 4)
}}}
I suggest to remake {{{singular.version}}} so that it returns a tuple of
integers, rather than a cryptic string.
Problem though: Would this break code?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5994>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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