Brabbel is a simple python based expression language. Brabbel can be used to evaluate basic arithmetic and boolean expression on a given set of python values in a save way.
Example:
from brabbel import Expression
expr = Expression("$foo < $bar")
values = {"foo": 1, "bar": 2}
expr.evaluate(values)
-> True
For more information please read the documentation on http://brabbel.readthedocs.org/en/latest