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

[aldasrasickas]

my code:

largest = None
smallest = None
while True:
    num = input("Enter a number: ")
    if num == "done" : 
        break
    try:
        num1 = int(num)
    except ValueError:
        print('Invalid input')
        continue
for number1 in num:
    if largest is None:
        largest = number1
    elif largest > number1:
        largest = number1
print("Maximum is", largest)
for number2 in num:
    if smallest is None:
        smallest = number2
    elif smallest < number2:
        smallest = number2
print("Minimum is", smallest)

My desired output would be if I used 2,8,9,python,4,10 would be:

Invalid input
Maximum is 10
Minimum is 2

But my output shows:

Invalid input
Maximum is d ← Mismatch
Minimum is o ← Mismatch

d and o are from word done

buran write Dec-21-2020, 11:23 AM:
Please, use proper tags when post code, traceback, output, etc. This time I have added tags for you.
See BBcode help for more info.