Math-Parser 0.1.2

This package evaluates mathematics expressions written in string safely.

Math Parser

Math-Parser is a Python package to evaluate math expressions in strings using a LL-Compiler Algorithm with no dependencies, except the standard packages.

It's not recommended to use eval to evaluate strings in Python for security reasons. This packages has the intention to solve this problem with safety.

Install

Install the latest version directly from the source using Git:

git clone
cd Math-Parser
python setup.py install

Usage

To use this package, import the evaluate function and call it.

from math_parser import evaluate

expr = '2 * (10/2) + 5'
evaluate(expr)

>>> 15.0

The evaluate function can receive variables to use it on the expression.

expr = 'a0 + a1/10'
evaluate(expr, a0=2, a1=10)

>>> 3.0

In this version of the package it only accepts some operators:

• Addition (+);
• Subtraction (-);
• Multiplication (*);
• Division (/)
• Exponentiation (^)

For now, it doesn't work with negative exponentiation.

Contact

If you want to contact me, email me: [e-mail]

Acknowledgements

This code was based on Georg Nebehay algorithm. Please check his code and documentation for better understanding of this package, and give him a star.