Quick Sort ExampleThe following is a Python implementation of the Quick Sort algorithm. quick_sort.py def quick_sort(arr): if len(arr) <= 1: return arr pivot = arr[len(arr) // 2] left = [x for x in arr if x < pivot] middle = [x for x in arr if x == pivot] right = ...
example=[1,3,4,5,2,6,9,7,8,0] a=0 b=len(example)-1 defquickSort(number,head,tail): if(head<tail): base=division(number,head,tail) #print(number[base],"\n") quickSort(number,head,base-1) quickSort(number,base+1,tail) else: print(number) defdivision(number,head,tail): bas...
3.4 快速排序(quick sort) 设要排序的数组是A[0]……A[N-1],首先任意选取一个数据(通常选用数组的第一个数)作为关键数据,然后将所有比它小的数都放到它前面,所有比它大的数都放到它后面,这个过程称为一趟快速排序。值得注意的是,快速排序不是一种稳定的排序算法,也就是说,多个相同的值的相对位置也许会在...
quick_sort(array,left,low-1) #最后用同样的方式对分出来的左边的小组进行同上的做法 quick_sort(array,low+1, right)#用同样的方式对分出来的右边的小组进行同上的做法 if __name__ == '__main__': array = [96,14,10,9,6,99,16,5,1,3,2,4,1,13,26,18,2,45,34,23,1,7,3,22,19,2...
example_df.sort_values(by=['血量', '智力'], ascending=False) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 2.DataFrame按索引进行排序 使用df.sort_index(ascending=True)进行排序,该函数有很多参数,最常用的就这一个,其余的参数博客结尾会讲到 ...
一、Python生态里的Pandas 五月份TIOBE编程语言排行榜，Python追上Java又回到第二的位置。Python如此受欢迎...
read_csv('example.csv',sep = ';') 如果不使用Pandas,我们首先需要安装Excel、CSV相关的第三方工具包,然后再写读写代码、异常处理、数据遍历,会麻烦很多。 2. 数据探索 读取数据之后,接下来要做的就是探索和熟悉数据。 在这里,以Netflix电影数据库数据为例进行介绍。 读取CSV文件前3行数据: df = pd.read...
meaning that it can sort items of any type for which a "less-than" relation (formally, a total order) is defined. Inefficient implementations it is not a stable sort, meaning that the relative order of equal sort items is not preserved. Quicksort can operate in-place on an array, requir...
This is because the key function is only called once for each input, this strategy is quick. Example: s= ["python", "java", "tutoring", "Favtutor", "Machine Learning", "Studies", "Code", "Students","Zebra","apple"] lower_string=[i.lower() for i in s] s.sort() print("...
Learn how to write a GPU-accelerated quicksort procedure using the algorithm for prefix sum/scan and explore other GPU algorithms, such as Reduce and Game of Life. Article Red Hat OpenShift AI and machine learning operations Gaurav Midha ...