A simple parser in Python by Chat GPT

Parser.py

import operator

# Define a dictionary of supported operations and their corresponding
# functions from the operator module
operators = {
    "+": operator.add,
    "-": operator.sub,
    "*": operator.mul,
    "/": operator.truediv,
}

def calculate(expression):
    # Convert the expression to a list of tokens
    tokens = expression.split()

    # Iterate over the tokens, using a stack to keep track of intermediate
    # results and operations
    stack = []
    for token in tokens:
        # If the token is a number, convert it to an integer and append it
        # to the stack
        if token.isdigit():
            stack.append(int(token))
        # If the token is an operator, pop the last two items from the
        # stack and apply the operator to them, then append the result
        # to the stack
        elif token in operators:
            right = stack.pop()
            left = stack.pop()
            result = operators[token](left, right)
            stack.append(result)

    # Return the result of the calculation
    return stack[0]

# Test the calculator
print(calculate("2 + 3 * 4"))  # 14
print(calculate("10 - 2 / 3"))  # 9.333333333333334