Quick sort and partition functions error

[KODE1047]

Hi !
In the codes of partition and quick sort in 06_03_Quick_Sort there is some errors. There is no swap() function in python, you should import random library and then use its functions, there is no rand() function in random its randint(), in arguments of quick sort there no part for getting array.

import random
def partition(A,left, right):
    leftPointer = left
    rightPointer = right-1
    A[right], A[random.randint(left,right)] = A[random.randint(left,right)], A[right]
    pivot = A[right]
    while True:
        while leftPointer<=rightPointer and A[leftPointer] <= pivot :
            leftPointer=leftPointer+1
        while rightPointer >= leftPointer and A[rightPointer] > pivot :
             rightPointer=rightPointer-1
        if leftPointer >= rightPointer :
             break
        else :
            A[leftPointer],A[rightPointer] = A[rightPointer], A[leftPointer] 

    A[leftPointer], A[right] = A[right], A[leftPointer]

    return leftPointer, pivot`

def quickSort(A, left, right):
    if right <= left:
        return
    index, pivot = partition(A,left, right)
    print("left=",left,"right=",right,"pivot=",pivot,"index=",index)
    print(A)
    print("")
    quickSort(A,left,index-1)
    quickSort(A,index+1,right) 

A=[19,97,22,50,93,31,72,11,46]

quickSort(A,0,8)

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