Quick Sort Function

Benutzer

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 = [x for x in arr if x > pivot]
return quick_sort(left) + middle + quick_sort(right)

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 = [x for x in arr if x > pivot] return quick_sort(left) + middle + quick_sort(right)

Python Development Assistant

Function Annotation

Function Description

quick_sort(arr) - This function implements the Quick Sort algorithm. It takes a list of elements and returns a new list with the elements sorted in ascending order.

Parameters

arr: A list of elements to be sorted. The elements in this list should be comparable with each other using comparison operators.

Return Value

The function returns a new list containing the elements from the input list arr, sorted in ascending order.

Function Code

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 = [x for x in arr if x > pivot]
    return quick_sort(left) + middle + quick_sort(right)

Unit Test Code

To test the quick_sort function, we can use Python's unittest framework. Below is a sample unit test:

import unittest

class TestQuickSort(unittest.TestCase):
    def test_quick_sort(self):
        self.assertEqual(quick_sort([3, 6, 8, 10, 1, 2, 1]), [1, 1, 2, 3, 6, 8, 10])
        self.assertEqual(quick_sort([]), [])
        self.assertEqual(quick_sort([1]), [1])
        self.assertEqual(quick_sort([1, 2, 3]), [1, 2, 3])
        self.assertEqual(quick_sort([3, 2, 1]), [1, 2, 3])

if __name__ == '__main__':
    unittest.main()

To run these tests, simply copy the test code into a Python script where the quick_sort function is defined and execute the script.

### Function Annotation #### Function Description `quick_sort(arr)` - This function implements the Quick Sort algorithm. It takes a list of elements and returns a new list with the elements sorted in ascending order. #### Parameters - `arr`: A list of elements to be sorted. The elements in this list should be comparable with each other using comparison operators. #### Return Value - The function returns a new list containing the elements from the input list `arr`, sorted in ascending order. ### Function Code ```python 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 = [x for x in arr if x > pivot] return quick_sort(left) + middle + quick_sort(right) ``` ### Unit Test Code To test the `quick_sort` function, we can use Python's unittest framework. Below is a sample unit test: ```python import unittest class TestQuickSort(unittest.TestCase): def test_quick_sort(self): self.assertEqual(quick_sort([3, 6, 8, 10, 1, 2, 1]), [1, 1, 2, 3, 6, 8, 10]) self.assertEqual(quick_sort([]), []) self.assertEqual(quick_sort([1]), [1]) self.assertEqual(quick_sort([1, 2, 3]), [1, 2, 3]) self.assertEqual(quick_sort([3, 2, 1]), [1, 2, 3]) if __name__ == '__main__': unittest.main() ``` To run these tests, simply copy the test code into a Python script where the `quick_sort` function is defined and execute the script.