使用python实现冒泡排序和快速排序

def bubble(arr):
    """冒泡排序"""
    loop = len(arr) - 1
    if loop > 0:
        for l in range(loop):
            for i in range(loop - l):
                if arr[i] > arr[i + 1]:
                    arr[i], arr[i + 1] = arr[i + 1], arr[i]
    return arr


def split_array(nums, left, right):  # 返回调整后基准数的位置
    key = nums[left]  # nums[left]就是第一个坑
    while left < right:
        # right下标位置开始，向左边遍历，查找不大于基准数的元素
        while left < right and nums[right] >= key:
            right -= 1
        if left < right:  # 找到小于准基数key的元素,然后交换nums[left],nums[right]
            nums[left], nums[right] = nums[right], nums[left]
        else:  # left〉=right 跳出循环
            break
        # left下标位置开始，向右边遍历，查找不小于基准数的元素
        while left < right and nums[left] < key:
            left += 1
        if left < right:  # 找到比基准数大的元素，然后交换nums[left],nums[right]
            nums[right], nums[left] = nums[left], nums[right]
        else:  # left〉=right 跳出循环
            break
    nums[left] = key
    return left  # 此时left==right 所以返回right也是可以的


def quick_sort(nums, left, right):
    if left < right:
        key_index = split_array(nums, left, right)
        quick_sort(nums, left, key_index - 1)
        quick_sort(nums, key_index + 1, right)


if __name__ == "__main__":
    from random import randint
    nums = list(randint(10, 99) for i in range(100))
    print(nums)
    quick_sort(nums, 0, len(nums) - 1)
    print(nums)

快速排序的理解可以参见http://blog.csdn.net/morewindows/article/details/6684558 写的很好