On Fri, Dec 5, 2014 at 8:53 PM, Steven D'Aprano
<steve+comp.lang.pyt...@pearwood.info> wrote:
> Oh, I learned something new: strictly speaking, this is implementation-
> dependent and not guaranteed to work in the future!
>
> def func():
> global math
> import math
When would you actually *want* this, though? Given that 'import'
already caches, there's not much point caching globally, and the idea
that a function could cause a module-level import to happen is pretty
weird!
The only scheme I could concoct would be something like this:
def use_foo():
global useme
import foo as useme
# code to initialize foo for our use
def use_bar():
global useme
import bar as useme
# likewise
def do_stuff():
useme.blah(1,2,3,4)
So, for instance, if you need a JavaScript executor, you might support
several different runtimes, and allow one to be selected like this.
But this would be serious code smell.
ChrisA
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