刚学python,不知道怎么做，求指点

Question

Answer 1

count = 0
total = 0
while True:
    shuru = input('Enter a number: ')
    if shuru.isdigit():
        count = count + 1
        total = total + int(shuru)
        continue
    if shuru == 'done':
        break   
    else:
        print("Invalid input")
print('Done!')
print("num: ", count)
print("sum: ", total)
ave = total / count
print("ave: ", ave)