#12205: rewrite conway polynomial spkg and code in Sage library to not use ZODB
-----------------------------+----------------------------------------------
Reporter: was | Owner: was
Type: task | Status: new
Priority: major | Milestone: sage-5.6
Component: databases | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
-----------------------------+----------------------------------------------
Comment (by fbissey):
In the end I am hitting a brick wall here. Possibly due to my lack of
python skills and my will to only have minimal changes in conway.py. The
issue is that the created sobj is a double dictionary and that the call to
the !ConwayPolynomials() class follow the same pattern as a double
dictionary. You have calls of the kind:
!ConwayPolynomials()[3][21]
Implementing the class as a dictionary allows sage to start
{{{
import os
from sage.structure.sage_object import load
from sage.misc.misc import SAGE_DATA
_CONWAYDATA = os.path.join(SAGE_DATA,'conway_polynomials')
class ConwayPolynomials(dict):
def __init__(self,*arg,**kw):
"""
Initialize the database.
"""
super(ConwayPolynomials, self).__init__(*arg, **kw)
def _init(self):
if not os.path.exists(_CONWAYDATA):
raise RuntimeError, "In order to initialize the database, the
directory must exist."%_CONWAYDATA
os.chdir(_CONWAYDATA)
self = load(os.path.join(_CONWAYDATA, 'conway_polynomials'))
}}}
but unfortunately but I get key errors:
{{{
sage: sage.databases.conway.ConwayPolynomials()[3][21]
---------------------------------------------------------------------------
KeyError Traceback (most recent call
last)
/home/fbissey/Work/Overlays/BlueFern/sci-mathematics/sage/<ipython
console> in <module>()
KeyError: 3
sage: sage.databases.conway.ConwayPolynomials().keys()
[]
}}}
I was hoping that inheriting the dict class the access problem would be
solved but I am obviously doing something wrong here. Loading the sobj
directly from sage is totally usable, it is just when trying to put it in
a class.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12205#comment:11>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
