> That's pretty much a solved problem in Python now - thanks to the well developed ecosystem,
I don't understand this argument. The same C and Fortran libraries that make numeric Python fast can be called just as easily from any other programming language, just like in Python.
> you don't really have to leave Python to write fast numerical code.
Well, you need to, for example, if you want to write a new numeric algorithm to call from python. As in, not use a numerical solver, but write a numerical solver from first principles. For that, Python is mostly useless and you'd need to use C or Fortran (or Julia).
I don't understand this argument. The same C and Fortran libraries that make numeric Python fast can be called just as easily from any other programming language, just like in Python.
> you don't really have to leave Python to write fast numerical code.
Well, you need to, for example, if you want to write a new numeric algorithm to call from python. As in, not use a numerical solver, but write a numerical solver from first principles. For that, Python is mostly useless and you'd need to use C or Fortran (or Julia).