Having two inputs to escape a while loop.

[Leo_Tovell]

For homework, ive been set a task to create a program which repeatedly asks the user if they need help. The question is asked over and over until the user either enters 'yes' or 'Yes'. I have tried everything to get it working. I just cant seem to get it to work... I have used square brackets to make a list under one variable containing 'yes' and 'Yes' i have even subsituted them for normal brackets... Help me please!

Heres the code: Loops arent my forté but its my best shot: My Document

answer = ["yes","Yes"]
userinput = (" ")
while userinput != answer:
    userinput = input("Do you need help?")
print("Heres your work!")