On 20 Mai, 07:57, Steven D'Aprano <ste...@remove.this.cybersource.com.au> wrote: > > Can you explain how you can tell that there are no side-effects from > x*sqrt(x)+3 ? What if I have this? > > class Funny(object): > def __add__(self, other): > global parrot > parrot += 1 > return 5 + other > > x = Funny()
Yes, in general you need whole-program analysis with Python to know if there are any side-effects or not. That said, with a process forking mechanism where modified "globals" are not global beyond each process, you should be able to guard against side-effects more effectively. Paul -- http://mail.python.org/mailman/listinfo/python-list
