如何制作嵌套循环语句以返回到特定语句

Question

Hello I am having trouble with crafting this loop instead of it going back to line after I declared the "nameone" variable I want it to go back to either input '*' or a name I tried putting the loop before the input but it will come up with the error "referenced before assignment" which I understand why but I can't figure out a way to craft it to where it will let you enter a new name

def GetPosInt():

        nameone = str(input("Please enter a student name or '*' to finish: "))

        while nameone != "*":
            scoreone = int(input("Please enter a score for " + nameone +": "))

            if scoreone < 0:
                print("positive integers please!")
                break

            else:
                scoretwo = float(input("Please enter another score for "+nameone+": "))
                scorethree = float(input("Please enter another score for "+nameone+": "))

            testscores = scoreone + scoretwo + scorethree    
            avg = testscores / 3    
            print("The average score for",nameone,"is ",avg)

        if nameone == "*":
            print("no bueno")

main

def main():
    GetPosInt()

Answer 1

" ...it will come up with the error "referenced before assignment"[...]

This is because, you're likely specifying the condition to be while nameone != '*': but, not declaring nameone until you enter the loop. You can remedy this easily. Try this:

nameone = None

while nameone != "*":
    nameone = str(input("Please enter a student name or '*' to finish: "))

    ... # everything else remains the same

    if nameone == "*":
        print("no bueno")

Answer 2

If what I understand of your question is correct then what you need is an outer loop.

Something like:

cont = 'y'

while cont=='y':
    # Do your thing

    cont = input("continue?(y/n)")

The code sample would be:

cont = 'y'

while cont=='y':
    nameone = str(input("Please enter a student name or '*' to finish: "))

    while nameone != "*":
        scoreone = int(input("Please enter a score for " + nameone +": "))

        if scoreone < 0:
            print("positive integers please!")
            break

        else:
            scoretwo = float(input("Please enter another score for "+nameone+": "))
            scorethree = float(input("Please enter another score for "+nameone+": "))

        testscores = scoreone + scoretwo + scorethree    
        avg = testscores / 3    
        print("The average score for",nameone,"is ",avg)

    if nameone == "*":
        print("no bueno") # I have no idea what that means.

    cont = input("continue?(y/n)")