dynamic values in yaml

[raphinou at gmail.com]

On Tuesday, August 19, 2014 7:15:54 PM UTC+2, Rustom Mody wrote:
> 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

Note that in my example the content to be inserted is not the result of a variable substitution, but the result of a call to a function. format doesn't seem to work in this case. 
And jinja2 doesn't seem to provide a straight forward solution either

Thx