This is weird!!! It should work but I get an but I get a "ValueError: I/O operation"

[ashergreen]

def has_33(nums):    length = len (nums) - 1    for i in range (length):        if nums [i] == 3 and nums [i+1] == 3:            return True    return False print (has_33([1, 3, 1, 3]))print (has_33([3, 1, 3]))print (has_33([1, 3, 3]))

Ok! It's working now. Thank you! I replaced the "quit()" with "returns" as you suggested and it appears to work, both with the code I had written and what you had written.