python built in binary search

Published: 13 December 2023
on channel: CodeLink

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Title: A Guide to Binary Search in Python
Introduction:
Binary search is an efficient algorithm for finding an item from a sorted list of items. It works by repeatedly dividing the search range in half. Python provides a built-in implementation of binary search through the bisect module. In this tutorial, we will explore how to use the bisect module to perform binary search in Python.
Step 1: Importing the bisect Module
To get started, import the bisect module. This module provides the bisect_left and bisect_right functions, which are essential for binary search.
Step 2: Basic Usage of bisect_left
The bisect_left function returns the index where the target element should be inserted to maintain the sorted order. If the element is already present, it returns the leftmost index.
Step 3: Basic Usage of bisect_right
The bisect_right function is similar to bisect_left, but it returns the rightmost index where the target element should be inserted.
Step 4: Searching for a Range
If you want to find the range of indices where the target element could be inserted, you can use both bisect_left and bisect_right.
Conclusion:
Python's bisect module provides a simple and efficient way to perform binary search on sorted lists. By using the bisect_left and bisect_right functions, you can easily find the index or range of indices where a target element should be inserted. This is a powerful tool for working with sorted data in various applications.
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