I have an index of variables. I need to find which ones are linked to a value of 1 and print their location in the list

Apples = 1
Oranges = 0
Bananas = 1
Grapes = 0

list1 = ["Apples", "Oranges", "Bananas", "Grapes"]

So in this example the locations should be 0 and 2.

>Solution :

Apples = 1
Oranges = 0
Bananas = 1
Grapes = 0

list1 = [Apples, Oranges, Bananas, Grapes]
y = len(list1)

for x in range(0,y):
    if list1[x] == 1:
        print (x)