Simple numeric list
Input
consecutive_pairs([10, 20, 30])
Output
[(10, 20), (20, 30)]
Pairs are (10,20) and (20,30).
Full lesson preview
Create consecutive pairs with zip
Use zip to build consecutive pairs from a sequence. Practice slicing and pairing adjacent elements efficiently.
Python practice8 minModules & Standard LibraryBeginnerLast updated March 23, 2026
Problem statement
Given a list of elements, return a list of consecutive pairs (as 2-tuples). Each pair should contain element i and element i+1 for all valid i. If the input list has fewer than two elements, return an empty list. Use Python's built-in zip and slicing to create the pairs efficiently.
Task
Write a function that returns a list of consecutive pairs (tuples) from an input list using zip.
Examples
Input format
A single list of values passed into consecutive_pairs(lst).
Output format
A list of 2-tuples representing adjacent element pairs.
Constraints
Do not modify the original list. The input list may contain any Python objects (numbers, strings, etc.). Time complexity should be O(n).
Samples
Sample 1
Input
consecutive_pairs(['a', 'b', 'c'])
Output
[('a', 'b'), ('b', 'c')]
Consecutive string pairs from the list.