handy-calc.py

from machine import Pin
import time
import math

memory = {}

print("MPY CALCULATING TERMINAL")

def calculate(expression):
    try:
        if '+' in expression:
            operand1, operand2 = expression.split('+')
            result = float(operand1) + float(operand2)
        elif '-' in expression:
            operand1, operand2 = expression.split('-')
            result = float(operand1) - float(operand2)
        elif '*' in expression:
            operand1, operand2 = expression.split('*')
            result = float(operand1) * float(operand2)
        elif '/' in expression:
            operand1, operand2 = expression.split('/')
            result = float(operand1) / float(operand2)
        elif '^' in expression:
            operand1, operand2 = expression.split('^')
            result = float(operand1) ** float(operand2)
        elif 'sqrt' in expression:
            _, operand = expression.split('sqrt')
            result = math.sqrt(float(operand))
        else:
            return "Invalid input"

        return result

    except ValueError:
        return "Invalid input. Enter a valid command."
    except ZeroDivisionError:
        return "Division by zero is not allowed."
    except Exception as e:
        return "An error occurred: " + str(e)

while True:
    user_input = input(">>> ").strip()

    if user_input.lower() == "exit":
        break
    elif user_input.lower().startswith("store"):
        _, key = user_input.split()
        if 'result' in locals():
            memory[key] = result
            print(f"Stored {result} in memory under key '{key}'")
        else:
            print("No result to store. Please perform a calculation first.")
    elif user_input.lower().startswith("recall"):
        _, key = user_input.split()
        if key in memory:
            print(f"Recalled value from key '{key}': {memory[key]}")
        else:
            print(f"No value stored under key '{key}'")
    else:
        result = calculate(user_input)
        print("Result:", result)