Last active
July 25, 2017 18:02
-
-
Save venkatsgithub1/65ccb83071224cd5afaffe89dcf6ae89 to your computer and use it in GitHub Desktop.
Quick sort algorithm in Python
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
def quicksort(templist): | |
if len(templist)<=1: | |
return templist | |
pivot=templist[0] | |
left,right=[],[] | |
for data in templist: | |
if data<pivot: | |
left.append(data) | |
elif data>pivot: | |
right.append(data) | |
left=quicksort(left) | |
right=quicksort(right) | |
# uncomment below line to see how data changes. | |
#print(" ".join((list(map(str,left))+[str(pivot)]+list(map(str,right))))) | |
return left+[pivot]+right | |
print(quicksort([5,8,1,3,7,9,2])) | |
'''take a pivot. In the above program element in first index is considered pivot. | |
bring items less than pivot to left. | |
now items greater than pivot are on right. | |
recurse until list size=1, base condition here: return | |
left+pivot+right is at the core of quicksort.''' |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment