it says "Oops, try again. Does your purify function take exactly one argument (a list of numbers)? Your code threw a "'int' object is not iterable" error."
I thought it will work and it will remove all the odd numbers that are in the list.
def purify(numbers): y= if len(numbers)>1: for i in numbers: if i%2==0: y+=i else: if numbers%2==0: y+=numbers return y