python - How to access a variable defined inside a function, from outside that function

Question

I am stuck on using variables defined in a previous function in another function. For example, I have this code:

def get_two_nums():
    ...
    ...
    op = ...
    num1 = ...
    num2 = ...
    answer = ...

def question():
    response = int(input("What is {} {} {}? ".format(num1, op, num2)))
    if response == answer:
        .....

How will I use the variables defined in the first function in the second function? Thank you in advance

Answer 1

Variables are local to the functions; you need to return the relevant values you want to share to the caller and pass them to the next function that uses them. Like this:

def get_two_nums():
    ...
    # define the relevant variables
    return op, n1, n2, ans

def question(op, num1, num2, answer):
    ...
    # do something with the variables

Now you can call

question(*get_two_nums()) # unpack the tuple into the function parameters

or

op, n1, n2, ans = get_two_nums()
question(op, n1, n2, ans)