It's just Python -- 
see http://www.diveintopython.net/html_processing/locals_and_globals.html. 
The built-in globals() function returns a dictionary of all the objects in 
the global environment.

Anthony

On Sunday, April 10, 2016 at 9:30:48 PM UTC-4, Alex Glaros wrote:
>
> I see globals used in the welcome app.  Are they something that 
> programmers can make good use of and what are they best suited for?
>
> {{if 'message' in globals():}}
> <h2>{{=message}}</h2>
> <p class="lead">{{=T('How did you get here?')}}</p>
> {{elif 'content' in globals():}}
> {{=content}}
> {{else:}}
> {{=BEAUTIFY(response._vars)}}
> {{pass}}
>
> thanks
>
> Alex Glaros
>

-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
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