Python：冒泡排序的列表索引超出范围

Question

I'm making Bubble Sort in Python, but for a reason I don't know of yet, a "List index out of range" error happens when and only when I run the code, with line 6 (if array[n] > array[n+1]:) causing the error.

Here's the code:

    n = 1
    b = len(array)
    while b > 1:
        while n < b:
            if array[n] > array[n+1]:
                array[n], array[n+1] = array[n+1], array[n]
            n += 1
        b -= 1
        n = 1
    return print(array)
array = [5,4,3,2,1]
bubblesort(array)```

Answer 1

Working code with minimum changes:

def bubblesort(array):
    n = 0                # Updated
    b = len(array) - 1   # Updated
    while b > 0:         # Updated
        while n < b:
            if array[n] > array[n+1]:
                array[n], array[n+1] = array[n+1], array[n]
            n += 1
        b -= 1
        n = 0            # Updated
    print(array)         # Updated

array = [5,4,3,2,1]
bubblesort(array)