Untitled

# Variables

logo = '''
 _____________________
|  _________________  |
| | Pythonista   0. | |  .----------------.  .----------------.  .----------------.  .----------------. 
| |_________________| | | .--------------. || .--------------. || .--------------. || .--------------. |
|  ___ ___ ___   ___  | | |     ______   | || |      __      | || |   _____      | || |     ______   | |
| | 7 | 8 | 9 | | + | | | |   .' ___  |  | || |     /  \     | || |  |_   _|     | || |   .' ___  |  | |
| |___|___|___| |___| | | |  / .'   \_|  | || |    / /\ \    | || |    | |       | || |  / .'   \_|  | |
| | 4 | 5 | 6 | | - | | | |  | |         | || |   / ____ \   | || |    | |   _   | || |  | |         | |
| |___|___|___| |___| | | |  \ `.___.'\  | || | _/ /    \ \_ | || |   _| |__/ |  | || |  \ `.___.'\  | |
| | 1 | 2 | 3 | | x | | | |   `._____.'  | || ||____|  |____|| || |  |________|  | || |   `._____.'  | |
| |___|___|___| |___| | | |              | || |              | || |              | || |              | |
| | . | 0 | = | | / | | | '--------------' || '--------------' || '--------------' || '--------------' |
| |___|___|___| |___| |  '----------------'  '----------------'  '----------------'  '----------------' 
|_____________________|
'''
operations = {
    '+' : add,
    '-' : subtract,
    '*' : multiply,
    '/' : divide
}

# Functions

def add(n1, n2):
    return n1 + n2

def subtract(n1, n2):
    return n1 - n2

def multiply(n1, n2):
    return n1 * n2

def divide(n1, n2):
    return n1 / n2

# Body

n1 = None
while True:
    print(logo)
    # Only ask user for n1 if we are not continuing from a previous calculation
    if not n1:
        n1 = float(input("What's the first number?: "))
    for key in operations:
        print(key)
    operation = input("Pick an operation: ")
    n2 = float(input("What's the next number?: "))
    result = operations[operation](n1, n2)
    print(f"{n1} {operation} {n2} = {result}")
    user_continue = input(f"Type 'y' to continue calculating with {result}, or type 'n' to start a new calculation: ")
    if user_continue == 'y':
        n1 = result
    else:
        n1 = None
        # Clear terminal
        print("\033c", end="")
        print(logo)