All of the core Scipy Stack is ported, though if you use more specialist libraries, they may be missing. The main pain point in switching is with unicode, which

All of the core Scipy Stack is ported, though if you use more specialist libraries, they may be missing. The main pain point in switching is with unicode, which is mostly not an issue for scientific/numberical code. Watch out, though, for integer division: now 1/2==0.5 (not 0).