How do I convert arithemtic string (like "2+2") to a number?

[John J. Lee]

"Adomas" <adomas.paltanavicius at gmail.com> writes:

> Well, a bit more secure would be
> 
> eval(expression, {'__builtins__': {}}, {})
> 
> or alike.

Don't believe this without (or even with ;-) very careful thought,
anyone.  Google for rexec.


John