Hello,
let's say you are trying to figure out how sage's diff-function work. Maybe
you write something like
#!/usr/bin/env sage
from sage.all import *
u = var('u')
breakpoint()
diff(sin(u), u)
and run it with ./filename.py . Once the breakpoint is encountered, you can
use step to step into the diff function and place breakpoints with break
filename:linenumber in sage's python code. I'm using this a lot and it
works fine. Problems arise, once you try to debug cython code. Neither
stepping nor placing breakpoints in the *.pyx file works.
I also tried https://trac.sagemath.org/ticket/13881, but this also works
rather poorly.
How do you guys usually debug sage's cython code?
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