infinity sequence generator for array

Generator.py

class Generator(object):
    def __init__(self, array):
        self.array = array
        self.index = 0

    def __getitem__(self, item):
        if isinstance(item, slice):
            start = item.start if item.start else 0
            self.index = (self.index + start) % len(self.array)
            return [self[0] for i in range(item.stop - start)]
        else:
            self.index = (self.index + item) % len(self.array)
            item = self.array[self.index]
            self.index = (self.index + 1) % len(self.array)
            return item

array = [1,2,3,4,5]
g=Generator(array)
print(g[:10]) #return [1, 2, 3, 4, 5, 1, 2, 3, 4, 5]