numexpr malicious attack safety

Question

Is numexpr safe again malicious attack?

I'm considering using it in a web application, to evaluate user input text.

I've also considered using PLY, ASTEVAL and Pyparsing.

Bigod

I am also very curious about numexpr and asteval? Hasn't anyone an opinion or experience about these packages? There's no end to the eval is dangerous talk. SymPy may also be susceptible to malicious attack. – Levey