implement Generator with class

Question

I am trying to write a generator with class thats gets a list of numbers and, for each number, return true if the sum of the divisors of this number is greater than the number and false if not. sum_of_divisor_helper is a helper function. Unfortunately I am getting this error:

Traceback (most recent call last): File "main.py", line 33, in for i in numbers: File "main.py", line 23, in next if (sum_of_divisor_helper(self.list1[self.x]) == True): NameError: name 'sum_of_divisor_helper' is not defined

This is the code:

class sum_of:
    
    def __init__(self,myList):
        self.x = 0
        self.list1 = myList
        
    def __iter__(self):
        return self
        
    def sum_of_divisor_helper(self):
        sum_of_divisors = 0
        for i in range(1, self.x):
            if self.x % i == 0:
                sum_of_divisors = sum_of_divisors + i
            else:
                pass
            if sum_of_divisors >= self.x:
                return True
            else:
                return False
        
    def __next__(self):
        if sum_of_divisor_helper(self.list1[self.x]) == True:
            return True
            self.x  = self.x + 1
        elif sum_of_divisor_helper(self.list1[self.x]) == False:
            return False
        else:
           raise StopIteration

numbers = sum_of([12,20,10,30])
for i in numbers:
    print(i)

Answer 1

Try

self.sum_of_divisor_helper(self.list1[self.x])

instead of

sum_of_divisor_helper(self.list1[self.x])

Use the self prefix when you're referring to a method inside of your class.