To: bSneddon
Copy: python-list@python.org (python-list@python.org)
On Tue, Dec 9, 2014 at 9:10 AM, bSneddon <w.g.sned...@gmail.com> wrote:
> I ran into an issue setting variables from a GUI module that imports a back
end module. My approach was wrong obviously but what is the best way to set
values in a back end module.
>
> #module name beTest.py
>
> cfg = { 'def' : 'blue'}
>
> def printDef(argT = cfg['def']):
> print argT
They're set when you define the function, and become attributes of the
function.
If you want to lazily fetch the defaults, here's one common idiom:
def printDef(argT=None):
"""Print the argT value, defaults to cfg['def']"""
if argT is None: argT = cfg['def']
print(argT)
This depends on None not being a meaningful argument value, of course.
If you need to have any object at all able to be passed in, you'd need
to create a dedicated sentinel object, or use *args and unpack
yourself; but for a lot of cases, None works fine.
ChrisA
--- SoupGate-Win32 v1.05
* Origin: <SpaceSST.BBS.Fidonet<>nntp.gatew...@.piz.noip.me> (1:249/999)
--- Synchronet 3.15b-Win32 NewsLink 1.92
SpaceSST BBS Usenet <> Fidonet Gateway
--
https://mail.python.org/mailman/listinfo/python-list
