InfixParser

InfixParser is a Python binding for MathParser (https://github.com/KJ002/MathParser/). This module allows for a simple and quick evaluation of strings. It allows you to evaluate a string with security, you define the external variables!

Examples

Basic Eval

result: float = InfixParser.evaluate("1+1") # returns 2.0

Basic Eval (With Evaluator Class)

evaluator = InfixParser.Evaluator()

result: float = evaluator.eval("1+1") # returns 2.0

External Variable Eval

evaluator = InfixParser.Evaluator()

x: int = 20

evaluator.append_variable("x", x)

result: float = evaluator.eval("1+x") # returns 21.0

Updating External Variable Eval

evaluator = InfixParser.Evaluator()

x: int = 20

evaluator.append_variable("x", x)

result1: float = evaluator.eval("1+x") # returns 21.0

x: int = 10

evaluator.append_variable("x", x)

result2: float = evaluator.eval("1+x") # returns 11.0

Functions Eval

"""
It is important to note that function do not have to
have to be called with in an instantiated class
and can just be called with InfixParser.evaluate()
"""

evaluator = InfixParser.Evaluator()

result: float = evaluator.eval("sin(1.5707963267948966)") # returns 1.0