Python-Learning/calculator at main · rgabiazo/Python-Learning · GitHub

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from calc_art import logo

print(logo)

# My Solution

def add(n1,n2):
    """ Function to add two numbers
    """
    return n1 + n2

def subtract(n1,n2):
    """ Function to subtract two numbers
    """
    return n1 - n2

def multiply(n1,n2):
    """ Function to multiply two numbers
        """
    return n1 * n2

def divide(n1,n2):
    """ Function to divide two numbers
            """
    return n1 / n2

operations = {"+": add,
              "-": subtract,
              "*": multiply,
              "/": divide
              }

def calculator():
    valid_choices = ['y','n']
    num1 = float(input("What's the first number?: "))

    for symbol in operations:
        print(symbol)

    operation_symbol = input("Pick an operation from the line above: ")

    num2 = float(input("What's the next number?: "))

    for key, val in operations.items():
        if key == operation_symbol:
            first_answer = val(num1,num2)

    print(f"{num1} {operation_symbol} {num2} = {first_answer}")

    ask_again = input(f"Type 'y' to continue calculating with {first_answer}, or type 'n' to start a new calculation: ")

    while ask_again not in valid_choices:
        ask_again = input(f"Those were not valid choices. Type 'y' to continue calculating with {first_answer}, or type 'n' to start a new calculation: ")
    if ask_again == 'n':
        calculator()

    while ask_again == 'y':
        operation_symbol = input("Pick another operation: ")
        num = float(input("What's the next number?: "))
        for key, val in operations.items():
            if key == operation_symbol:
                recent_answer = val(first_answer, num)

        print(f"{first_answer} {operation_symbol} {num} = {recent_answer}")
        first_answer = recent_answer
        ask_again = input(f"Type 'y' to continue calculating with {recent_answer}, or type 'n' to start a new calculation: ")
        while ask_again not in valid_choices:
            ask_again = input(f"Those were not valid choices. Type 'y' to continue calculating with {recent_answer}, or type 'n' to start a new calculation: ")
        if ask_again == 'n':
            calculator()

calculator()