A discusssion of mutating versions of GMP (etc) is emphasized in material here http://www.mail-archive.com/sage-devel@googlegroups.com/msg27570.html
Note that converting (in applications of these Lisp programs) to gmp integers and back is not something you do very often. After all, if you are doing gmp arithmetic, about the only time you need conversion is (maybe) to set up the problem and (maybe) to print the results. I would guess the same holds for Sage. Writing the conversion code in lisp is not difficult. I don't know why it should be difficult in Python, unless you have only fixed-precision integers. Feel free to adopt it. -- 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