#5475: make it so ipython isn't imported when one does "sage -python"
------------------------+---------------------------------------------------
Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-3.4
Component: interfaces | Keywords:
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If one wants to use Sage from a C program, e.g., like this (see below),
then it's important that "from sage.all import *" not import Ipython. The
point of this ticket is make the import of IPython lazy -- and only happen
if needed. This will also make "sage -python" and "sage -c" faster, since
Ipython startup takes significant time.
{{{
/*
sage -sh
gcc -I$SAGE_LOCAL/include/python2.5
$SAGE_LOCAL/lib/python/config/libpython2.5.a embed.c -o embed; ./embed
See http://docs.python.org/extending/embedding.html
*/
#include <Python.h>
int
main(int argc, char *argv[])
{
Py_Initialize();
printf("Loading the Sage library...\n");
PyRun_SimpleString("from sage.all import *");
printf("Factoring an integer:\n");
PyRun_SimpleString("print factor(193048120380)");
printf("Popping up plot of a function:\n");
PyRun_SimpleString("x=var('x'); show(plot(sin(x)))");
printf("Popping up plot of a 3-d function:\n");
PyRun_SimpleString("x,y=var('x,y'); show(plot3d(sin(x*y)-cos(x-y),
(x,-4,4),(y,-4,4)))");
printf("Type 0 then return\n");
int n;
scanf("%d",&n);
printf("Exiting...\n");
Py_Finalize();
return 0;
}
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5475>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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