[Configobj-develop] Re: Example in documentation

[Michael F. <mi...@pc...>]

m.g...@gm... wrote:
> Michael Foord schrieb:
> 
>> Ok - I'll try and add an example. It is slightly weird. (Which for
>> reference allows you to change the name and values of a ConfigObj by
>> passing in a single function).
> 
> 
> 
> to generate configfiles from a template
> simple e.g.
> [XXXXX_section]
> key1 = blalba\XXXXX\value1.txt
> 
> [CLIENT1_section]
> key1 = blalba\CLIENT1\value1.txt
> 
> [CLIENT2_section]
> key1 = blalba\CLIENT2\value1.txt
> Marc
> ps. ok, i can replace  XXXXX with CLIENT1 or CLIENT2, because your
> module is more elegant ;-).
> 
> 

You can use the ``encode`` and ``decode`` section methods as examples of
using the walk method. You use the ``rename`` method to change the name
of a key.

Suppose you want to change 'XXXX' in values *and* names into 'CLIENT1',
you define a function to do the transformation.

A function passed to the walk method needs the argument signature :

(section, key)

Values can be lists or strings, or if the value is a section it will be
a dictionary. Suppose we ignore lists and only do the replace on strings.

So we define our function :
def transform(section, key):
    val = section[key]
    if isinstance(val, (list, tuple, dict)):
        newval = val
    else:
        newval = val.replace('XXXX', 'CLIENT1')
    newkey = key.replace('XXXX', 'CLIENT1')
    section.rename(key, newkey)
    section[newkey] = newval

So you can then call :

config = ConfigObj(filename)
config.walk(transform, call_on_sections=True)

Does that help ?

All the best,

Fuzzyman
http://www.voidspace.org.uk/python