Determine if string is "affirmative"?

Question

I'd like to use Python 3's input() function to ask the user a yes or no question. For example:

affirmative = ["", "y", "yes"]
x = input("Continue? [Y/n] ").lower()
if x in affirmative:
    # Do something
else:
    print("Canceled")

Is there a certain list I should be using for "affirmative" answers? I know Python has things like string.uppercase and string.lowercase for pre-determined lists of variables. Is there a list of answers that should be considered a "yes" answer?

Answer 1

Python's distutils has strtobool which might work for you. Documentation Link.

distutils.util.strtobool(val)

Convert a string representation of truth to true (1) or false (0).

• True values are: y, yes, t, true, on, 1.
• False values are: n, no, f, false, off, 0.
• Raises ValueError otherwise.

But this doesn't exactly fit with the style you're currently hoping for.