Hi all,
After updating from 3.2 to 4.2 (both by sage -upgrade and rebuilding
from fresh tarball) I get following result, when trying to merely
import graphs.graph module:
======================================================
pa...@pavelx:~$ uname -a
Linux pavelx 2.6.30-2-amd64 #1 SMP Fri Sep 25 22:16:56 UTC 2009 x86_64
GNU/Linux
pa...@pavelx:~$ sage --version
| Sage Version 4.2, Release Date: 2009-10-24 |
pa...@pavelx:~$ sage 1.py
Traceback (most recent call last):
File "1.py", line 1, in <module>
from sage.graphs.graph import DiGraph
File "/home/pavel/sage/local/lib/python2.6/site-packages/sage/graphs/
graph.py", line 388, in <module>
from sage.rings.integer import Integer
File "integer.pyx", line 158, in sage.rings.integer (sage/rings/
integer.c:31398)
File "/home/pavel/sage/local/lib/python2.6/site-packages/sage/rings/
infinity.py", line 200, in <module>
import sage.rings.rational
File "rational.pyx", line 70, in sage.rings.rational (sage/rings/
rational.c:23942)
File "real_mpfr.pyx", line 1, in sage.rings.real_mpfr (sage/rings/
real_mpfr.c:29489)
File "complex_number.pxd", line 8, in sage.libs.mpmath.utils (sage/
libs/mpmath/utils.c:5327)
File "complex_double.pxd", line 13, in sage.rings.complex_number
(sage/rings/complex_number.c:14452)
File "complex_double.pyx", line 88, in sage.rings.complex_double
(sage/rings/complex_double.c:13818)
File "/home/pavel/sage/local/lib/python2.6/site-packages/sage/rings/
complex_field.py", line 86, in ComplexField
C = ComplexField_class(prec)
File "/home/pavel/sage/local/lib/python2.6/site-packages/sage/rings/
complex_field.py", line 175, in __init__
ParentWithGens.__init__(self, self._real_field(), ('I',), False)
File "/home/pavel/sage/local/lib/python2.6/site-packages/sage/rings/
complex_field.py", line 228, in _real_field
self.__real_field = real_mpfr.RealField_constructor(self._prec)
File "real_mpfr.pyx", line 247, in
sage.rings.real_mpfr.RealField_constructor (sage/rings/real_mpfr.c:
3923)
TypeError: 'NoneType' object is unsubscriptable
======================================================
That is Debian lenny/testing. The same thing reportedly happens at
i586 machine (Kubuntu 9.10) too.
Something similar was googled up under following ticket, but I have
little clue how to relate these:
http://trac.sagemath.org/sage_trac/ticket/6505
So thanks for advice,
and for great software,
--Pavel.
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