On Sunday, November 12, 2017 at 7:18:04 PM UTC-7, bvdp wrote: > I'm having a conceptual mind-fart today. I just modified a bunch of code to > use "from xx import variable" when variable is a global in xx.py. But, when I > change/read 'variable' it doesn't appear to change. I've written a bit of > code to show the problem: > > mod1.py > myvar = 99 > def setvar(x): > global myvar > myvar = x > > test1.py > import mod1 > mod1.myvar = 44 > print (mod1.myvar) > mod1.setvar(33) > print (mod1.myvar) > > If this test1.py is run myvar is fine. But, if I run: > > test2.py > from mod1 import myvar, setvar > myvar = 44 > print (myvar) > setvar(33) > print (myvar) > > It doesn't print the '33'. > > I thought (apparently incorrectly) that import as would import the name myvar > into the current module's namespace where it could be read by functions in > the module????
Thanks all for confirming that I was wrong to use "from .. import". Hmmm, perhaps for functions it might be okay. But, in most cases it's a lot more obvious to use module.function() when calling. Maybe a bit slower, but I'm sure it's negligible in most cases. And, yes, I am trying to share state info between modules. Is this a bad thing? I guess I would write getter() and setter() functions for all this. But that does seem to remind me too much of some other language :) -- https://mail.python.org/mailman/listinfo/python-list
