[Configobj-develop] Using external list/tuple for parameters to option() validator

[Darren S. <pha...@gm...>]

I have a case in a script where I have a data structure defined in an
external module, which is also a library we use in the script. I'd
like to use that data in a DRY fashion in this script (which uses
ConfigObj) by passing the structure (a list) as the argument to the
option() validator. The reason for this is that the data in the target
configuration field will ultimately be passed to the external module
and will be validated against it, so the external module is
essentially "authoritative" for the application.

In the external module (mylib.py):

CATEGORIES = ['WHITE', 'GREEN', 'AMBER', 'RED']


In the script:

from mylib import CATEGORIES as allowed_categories

CONFIGSPEC = '''\
logfile = string
[foo]
user = string
pass = string
[bar]
[[__many__]]
category = string
'''


As shown I currently validate the 'category' option with string(), but
I'd really like to use option() instead with the set of choices taken
from the list imported from mylib; something like the following:

category = option(allowed_categories)

That syntax doesn't work and various attempts to coerce the list into
a string that resembles a list of allowed values with join() hasn't
done the trick. Is there currently a way to get this to function as I
want? Any way to allow option() to accept a tuple or list as the
arguments to ease working with structured data for that validator?

-- 
Darren Spruell
pha...@gm...