mathterpreter

A lightweight and basic maths interpreter

Example usage

Basic usage

from mathterpreter import interpret

print(interpret("54-3*(2+1)-3", use_decimals=False))

Step by step

from mathterpreter import Lexer, Parser

lexer = Lexer("54-3*(2+1)-3", use_decimals=False)
tokens = lexer.tokenize()
parser = Parser(tokens)
tree = parser.parse()
result = tree.evaluate()
print(result)

use_decimals determines whether numbers should be handled as decimal.Decimal rather than float for more accurate but slower calculations. Defaults to True

Command line

python3 -m mathterpreter 54-3*(2+1)-3
# or
echo 54-3*(2+1)-3 | python3 -m mathterpreter

Syntax:

Operation	Syntax
Addition	a+b
Subtraction	a-b
Multiplication	a*b
Division	a/b
Exponentiation	a^b
ath root	a√b or asqrtb
Standard Form:	aE+b (shorthand for a*10^b)

Constants:

Symbol(s)	Value
π/pi	3.141592653589793
e	2.718281828459045

All constants are just replaced with their value, wrapped in brackets.