My code doesn't work, can someone help me?

[DeaD_EyE]

Hint: Use a function to split user-input and logic to get minimum and maximum.

def get_number():
    """
    Helper function to get one int from user input
    """
    while True:
        num_input = input("Enter a number: ")
        if num_input.lower() == "done": 
            return None
        try:
            return int(num_input)
        except ValueError:
            print('Invalid input')


def get_min_max():
    """
    Primitive implementation using a list with min and max.
    """
    numbers = []
    while True:
        number = get_number()
        if number is None:
            break
        numbers.append(number)
    return min(numbers), max(numbers)


def get_min_max_oneshoot():
    """
    Returns minimum and maximum of entered ints.
    The ints itself are not stored in a list.
    """
    first_run = True
    minimum = None
    maximum = None
    while True:
        number = get_number()
        if number is None:
            break
        if first_run:
            first_run = False
            minimum = number
            maximum = number
            continue
        minimum = min(number, minimum)
        maximum = max(number, maximum)
    return minimum, maximum


min_value_1, max_value_1 = get_min_max_oneshoot()
# min_value_2, max_value_2 = get_min_max()

The function get_min_max is the easier implementation.
get_min_max_oneshoot is like your implementation, but without storing any history values.
You get only min and max, all other values are not stored.