Could someone highlight why the following happens?
from a sage session, the names that can be imported from
sage.rings.integer_ring are:
{{{
EuclideanDomains Z factor
is_IntegerRing
IntegerRing ZZ factorization ring
IntegerRing_class arith gmp_randrange sage
ParentWithGens clear_mpz_globals init_mpz_globals
Sequence crt_basis integer_ring_python
}}}
However, from a sage -ipython session we have the following:
{{{
IntegerRing clear_mpz_globals factor
init_mpz_globals
IntegerRing_class crt_basis gmp_randrange
is_IntegerRing
}}}
Imported names and variables defined without def are not available in
ipython?
I suspect that this has to do with cython and extension modules and
has a bad impact on lazy_import since not all names can be
lazy_imported. Moreover, on a pure ipython session it is trivial to
get segfaults unless one import all from sage.all
{{{
$ sage -ipython
In [1]: from sage.rings.integer_ring import *
...
AttributeError: 'module' object has no attribute 'ZZ'
In [2]: from sage.rings.integer_ring import *
In [3]: IntegerRing()
------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred because a *compiled* component
of Sage has a bug in it (typically accessing invalid memory)
and is not properly wrapped with sig_on(), sig_off().
You might want to run Sage under gdb with 'sage -gdb' to debug this.
Sage will now terminate (sorry).
------------------------------------------------------------
}}}
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: http://www.sagemath.org
