On 10/6/11 4:53 PM, Marcin Kostur wrote:
Hi,
Possibility of nice integration of fast compiled code is an excellent
feature of sage.
Suppose that I have a workflow:
1) derive some formulas with symbolics, arriving at expression of
type sage.symbolic.expression.Expression
2) evaluate the resulting expression many times: e.g. plotting,
integrating, solving ode with rhs equal to the expression.
The step "2" can be coded with cython, i.e. I want to use own
algorithm for "2". But the question remains - how to get
sage.symbolic.expression.Expression into a cython code? Is there any
way to do so? My solution is to "retype" the expression into cython
cell ;-(
I was going to say that fast_callable was your friend, but this shows
that sometimes, fast_callable isn't smart enough (apparently it doesn't
know about the libc log, for example):
http://test.sagenb.org/home/pub/10/
However, it might be sufficient for you, and it gets pretty close to
hand-coded Cython.
This also seems relevant:
http://www.sagenb.org/home/pub/3126/
Thanks,
Jason
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