dynamic values in yaml

[Rustom Mody]

On Tuesday, August 19, 2014 10:31:03 PM UTC+5:30, Laurent Pointal wrote:
> raphinou  wrote:

> > Hi,
> > I'm using pyyaml, and need some values in a yaml files to be dynamic, 
> for
> > example somethin like:
> >   filename: /tmp/backup_{% time.strftime('%Y-%m-%d') }.tgz
> > Is there a simple way to achieve this? (Eg with a templating system 
> that
> > would first handle the template parts from the yaml file)
> > Thanks

> I used jinja2 templating system to build (render) the yaml string 
> representation before processing it with yaml.

> But for a simple use, maybe a direct keyword replacement is easier (but 
> gives less control in the template, more in the code).

Python's format operator -- '%' or the modern variant -- 
is a mini-templating language:

open(templatefile).read() % substitutions