Python learning hub

Python Examples You Can Run Online

Learn Python, algorithms, NumPy, and pandas with practical code, expected output, clear explanations, and one-click access to the CodeUtility Python IDE.

Run Python Code Online →

Explore by topic

Python Basics Learn Python collections, loops, functions, classes, exceptions, JSON, and other core language features with runnable examples.

Beginner Python Exercises Practice Python with approachable problems such as Fibonacci, prime numbers, palindromes, factorials, and text processing.

Python Algorithms Learn searching, sorting, recursion, arrays, stacks, queues, graphs, and dynamic programming with runnable Python code.

Run NumPy Online Learn NumPy through executable array, matrix, statistics, indexing, and reshaping examples.

Run pandas Online Learn pandas through executable DataFrame, CSV, filtering, grouping, sorting, and missing-data examples.

Python Design Patterns Implement creational, structural, and behavioral design patterns with runnable Python examples.

Featured runnable examples

Fibonacci in Python

Generate the Fibonacci sequence in Python and run the code online.

View example →

Check a Prime Number in Python

Check whether a number is prime with an efficient Python example.

View example →

Palindrome in Python

Check whether text is a palindrome using Python string operations.

View example →

Reverse a String in Python

Reverse a Python string with slicing and run the example online.

View example →

Factorial in Python

Calculate a factorial in Python with an iterative function.

View example →

List in Python

Create, update, filter, and iterate over a Python list.

View example →

Dictionary in Python

Create, update, and iterate over a Python dictionary.

View example →

For Loop in Python

Learn Python for loops with range, enumerate, and a runnable example.

View example →

While Loop in Python

Run a Python while loop and learn how its condition controls repetition.

View example →

Function in Python

Define and call a Python function with parameters and a return value.

View example →

Sort a List in Python

Sort numbers and records in Python with sorted and a custom key.

View example →

Count Word Frequency in Python

Count repeated words in Python with collections.Counter.

View example →