Bubble Sort in Python3

def bubble_sort():
    n = len(array)
    while (n > 0):
        lastModifiedIndex = 0
        currentIndex = 1
        while (currentIndex < n):
            # if the item at the previous index is greater than the item at the `currentIndex`, swap them
            if (array[currentIndex - 1] > array[currentIndex]):
                # swap
                temp = array[currentIndex - 1]
                array[currentIndex - 1] = array[currentIndex]
                array[currentIndex] = temp
                # save the index that was modified
                lastModifiedIndex = currentIndex
            currentIndex += 1
            # save the last modified index so we know not to iterate past it since all proceeding values are sorted
        n = lastModifiedIndex

if __name__ == '__main__':
    array = [12, 11, 15, 10, 9, 1, 2, 3, 13, 14, 4, 5, 6, 7, 8]
    bubble_sort(array)
    print(array)