How can I implement sorting algorithms in Python?

How can I implement sorting algorithms in Python?

You can implement sorting algorithms like bubble sort, quicksort, and mergesort in Python. Which one would you like to start with?

Let's start with bubble sort. Can you show me the code?

Sure! Here's a simple implementation of bubble sort in Python:

def bubble_sort(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n-i-1):
            if arr[j] > arr[j+1]:
                arr[j], arr[j+1] = arr[j+1], arr[j]
    return arr

# Example usage:
arr = [64, 34, 25, 12, 22, 11, 90]
print(bubble_sort(arr))

What is the time complexity of bubble sort?

The time complexity of bubble sort is O(n^2) in the worst and average cases, and O(n) in the best case when the array is already sorted.

Can you explain how quicksort works?

Absolutely! Quicksort is a divide-and-conquer algorithm. It selects a 'pivot' element and partitions the array into two sub-arrays: elements less than the pivot and elements greater than the pivot. It then recursively sorts the sub-arrays.