Best way to evaluate boolean expressions from strings?

[Gabriel Genellina]

En Mon, 27 Apr 2009 14:03:01 -0300, Gustavo Narea <me at gustavonarea.net>  
escribió:

> I need to evaluate boolean expressions like "foo == 1" or "foo ==1 and
> (bar > 2 or bar == 0)" which are defined as strings (in a database or
> a plain text file, for example). How would you achieve this?

This recent thread may be of interest:

Safe eval of moderately simple math expressions
http://groups.google.com/group/comp.lang.python/t/c1aff28494ab5b59/

-- 
Gabriel Genellina