pymep can parse or evaluate math expressions and it is tested using matlab/octave
This algorithm does not use a decision tree. It is a kind of Recursive Ascent Parser (https://en.wikipedia.org/wiki/Recursive_descent_parser). In fact, it is LR parser (Left-Right Parser) without backtracking. This recursive algorithm is faster than decision trees
https://pypi.org/project/pymep/
pip install pymep
- sin, cos, tan, sinh, cosh, tanh, asin, acos, atan, log, log10, sqrt
- pi, e
- real or complex numbers
fx= 2*(e*2)
-
Expressions in vars
var = {"x":"1+2+3+4+5", "Z":1} eval(" 2*(-(((z*3)*sqrt(x^(2)))+3))",var)
from pymep.realParser import parse
from pymep.realParser import eval
#Real Expresion parser
fx="cos(10)"
print(parse(fx))
xi=5
fx = "1 + x"
print(eval(fx, xi))
var = {"x":"1+1", "Z":1}
eval(" 2*(-(((z*3)*sqrt(x^(2)))+3))",var)
from pymep.complexParser import parse
from pymep.complexParser import eval
from pymep.complex import Complex
#Operation with complex numbers
a = Complex(1,2)
print(a.__radd__(10).__complex__())
print(Complex.radd(10, a).__complex__())
#Complex Expresion parser
fx="cos(10+2j)"
print(parse(fx).__complex__())
xi=5
fx = "1 +j+x"
print(eval(fx, xi).__complex__())
var={"x":"1+2j", "Y":complex(2,1)}
f_x = "x-y"
eval(f_x,var).__complex__()
There is a full list of examples inside!!
from pymep.realParserTest import functionXTest;
p = functionXTest();
p.test_one();
p.test_three();
Zero vulnerabilities on https://snyk.io/vuln/pip:pymep
- The java version of this library is: https://github.com/sbesada/java.math.expression.parser
- Regarding to the OS where you excute the tests, it is possible that some tests fail beacause of rounding issues. The mathematical library that was used in this project is "math". In the future, it is possible that the math library changes.
If you are interested in logical parsers or any task related to parsers, you can consult my professional services page https://github.com/sbesada/professional.services
If you think that my work deserves a donation, you can do it: https://sbesada.github.io/