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CODE EXAMPLE FOR PYTHON

quicksort python

"""Basic Quicksort
"""
from random import randint
def qs_basic(nums, low=0, high=None):
    if high is None:
        high = len(nums) - 1
    # Sorting
    if low < high:
        pivot = nums[randint(low, high)]
        # i finds greater than pivot, j finds smaller than pivot
        i, j = low, high
        
        # Sort the pivot
        while i <= j:
            while nums[i] < pivot:
                i += 1
            while nums[j] > pivot:
                j -= 1
                
            # Pivot still not sorted
            if i <= j:
                nums[i], nums[j] = nums[j], nums[i]
                i += 1
                j -= 1
                
        # Recursive Partition
        qs_basic(nums, low, j)
        qs_basic(nums, i, high)
    return nums # for easy testing
Source by www.geeksforgeeks.org #
 
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Tagged: #quicksort #python
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