A small, self contained lexer and expression parser written in Python. Compatible with Python3 and 2. No pip requirements.
Example: main.py
from solver import Parser
def main():
expr = "2 + sin(1/2) * 44.0"
print("\"{}\"".format(expr))
parser = Parser(expr)
tokens = parser.parse()
for t in tokens:
print(t.token)
if __name__ == "__main__":
main()
~# python ./main.py
"2 + sin(1/2) * 44.0"
Variable.Constant
Operator.Add
Function.Sin
Operator.LeftParen
Variable.Constant
Operator.Divide
Variable.Constant
Operator.RightParen
Operator.Multiply
Variable.Constant
Note that this is an expression parser and not a solver.
This is an upload of some old code from 2016. This code was used in my project
LittleMan.