formparse

Simple library for evaluating mathematical formulas.

Written as an safe alternative to Pythons eval() function the aim was to provide a lightweight library that could evaluate mathematical formulas provided by users in a safe way.

Installation

You can install this package unsing pip:

pip install formparse

SECURITY WARNING!

Usage

from formparse import Formula

formula = Formula('3*x**2')

result = formula.eval({'x': 2})

Alternatives

numexpr:

numexpr is a Python library for numpy that accelerates array operations but it can hadnle simple string calculations as well. It is therefore a lot bigger than formparse but if you are using numpy anyways in you project or need additional features that we do not provide this might be a good fit. Check out its repo here .