迭代器 Class 不递增值 Python

Question

I am using an Iterator class to generate a geometric progression. When I compile the code it runs the correct number of times but the value of my iterator does not change from the first value. For example if I input 5 for the number of terms, 2 for the first term, and 3 for the common ratio the program will output 2 five times. What have I messed up?

class geo_p:
    def __init__(self, n):
        self.a = int(input('Enter the first term:'))
        self.d = int(input('Enter the common ratio:'))
        self.i = self.a
        self.n = n

    def _iter_(self):
        return self

    def _next_(self):
            i = 1
            if i < self.n:
                #sets curr = to the current term in progression
                current = self.i
                self.i = (self.i * (self.d**(i-1))) 
                i +=1
                return current

            else:
                raise StopIteration()

y = geo_p
n = int(input('Enter the number of terms: '))
y.__init__(y, n)
print(y)
for i in range (n):
    print(y._next_(y)) 



        

Answer 1

i is always 1 (at the top of __next__ )

1-0 is always zero

anything raised to the zero is 1 (@ self.d**(i-1) )

so you end up with self.i = self.i * 1

but as the comments on this answer and the original question point out... you have other issues... but this is why self.i is not incrementing when you call _next_()