Re: [gentoo-science] [sage-on-gentoo]mpmath testing

[Steven Trogdon]

On   10/19/10 - 04:45:49, François Bissey wrote:

> Thank you Steve,
>
> Could you send me the result of
> printenv | grep SAGE
> from the machine running sage-4.5.3.

printenv | grep SAGE gives (on _all_ installations)


SAGE_DATA=/usr/share/sage/data
SAGE_BROWSER=/usr/bin/firefox
SAGE_LOCAL=/usr
SAGE_ROOT=/usr/share/sage
SAGE_DOC=/usr/share/sage/devel/sage/doc


For mpmath with sage-4.6alpha3
> I was expecting this error:
> >>> import mpmath
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "/usr/lib/python2.6/site-packages/mpmath/__init__.py", line 6,
> in
> <module>
>     from ctx_mp import MPContext
>   File "/usr/lib/python2.6/site-packages/mpmath/ctx_mp.py", line 48,
> in
> <module>
>     from sage.libs.mpmath.ext_main import Context as BaseMPContext
>   File "integer.pxd", line 9, in init sage.libs.mpmath.ext_main
> (sage/libs/mpmath/ext_main.c:22894)
>   File "integer.pyx", line 165, in init sage.rings.integer
> (sage/rings/integer.c:33926)
>   File "/usr/lib/python2.6/site-packages/sage/rings/infinity.py",
> line 200, in
> <module>
>     import sage.rings.rational
>   File "rational.pyx", line 70, in init sage.rings.rational
> (sage/rings/rational.c:25264)
>   File "real_mpfr.pyx", line 1, in init sage.rings.real_mpfr
> (sage/rings/real_mpfr.c:31325)
>   File "complex_number.pxd", line 8, in init sage.libs.mpmath.utils
> (sage/libs/mpmath/utils.c:7374)
>   File "complex_double.pxd", line 13, in init
> sage.rings.complex_number
> (sage/rings/complex_number.c:18312)
>   File "complex_double.pyx", line 95, in init
> sage.rings.complex_double
> (sage/rings/complex_double.c:16534)
>   File
> "/usr/lib/python2.6/site-packages/sage/rings/complex_field.py", line
> 89,
> in ComplexField
>     C = ComplexField_class(prec)
>   File
> "/usr/lib/python2.6/site-packages/sage/rings/complex_field.py", line
> 187, in __init__
>     ParentWithGens.__init__(self, self._real_field(), ('I',), False,
> category =
> Fields())
>   File
> "/usr/lib/python2.6/site-packages/sage/rings/complex_field.py", line
> 240, in _real_field
>     self.__real_field = real_mpfr.RealField(self._prec)
>   File "real_mpfr.pyx", line 267, in sage.rings.real_mpfr.RealField
> (sage/rings/real_mpfr.c:4222)
> TypeError: 'NoneType' object is unsubscriptable
> >
>
> ----------------
> I posted about it on the sage-release, where we talk about the
> sage-4.6 pre
> releases, and no one else has the problem so far. If you don't have
> it either
> that may be a problem on my machine.
>
> Francois
>

I don't get the above with an import of mpmath. Just a thought, could  
it be mpfr-related. I'm using
mpfr-2.4.2_p3 here.

Steve