Need help creating a function and calling a function in a function

Question

I'm new to programming/Python. I'm trying to create a function that will add a word to a list. I tried to use a while loop to add ask if the user wants to add another word. If the user inputs 'y' or 'Y' I want to run the function again. If the user inputs anything else, I want the function to return the list. When I run the function, it continues to run the function again no matter what is input. Please help. Thanks

def add_list():
    x = []
    first_list = raw_input('Please input a word to add to a list ')
    x.append(first_list)
    response = raw_input('Would you like to enter another word ')
    while response == 'y' or 'Y':
        add_list()
    else:
        return x

Answer 1

while response == 'y' or 'Y':

Should be

while response == 'y' or response == 'Y':

or better yet:

while response in ('y', 'Y'):

---

Here's why what you did doesn't work. Each line below is equivalent.

while response == 'y' or 'Y'
while (response == 'y') or ('Y')
while (response == 'y') or True
while True

Answer 2

Just make the list a parameter you pass to the function:

x = []
add_list(x)

With add_list(x)

def add_list(x):
  first_list = raw_input('Please input a word to add to a list ')
  x.append(first_list)
  response = raw_input('Would you like to enter another word ')
  while response in ('y', 'Y'):
    add_list(x)
  else:
    return