Python Tutorial

Learn Python step by step with hands-on, checked-against-the-real-interpreter exercises.

Python is one of the most widely used languages for scripting, data work, and backend services — but going from "I can read Python" to "I can write it fluently" takes hands-on reps with lists, dicts, comprehensions, and the control-flow basics.

This tutorial builds up from print() and variables to comprehensions, dictionaries, exceptions, and generators, finishing with a capstone that combines them. Each step gives you setup code and a goal; you write the exercise and we run it through a real Python interpreter (Pyodide, right in your browser) to check your output.

What you'll practice (18 steps)

print() and variables
f-string number formatting
Lists: indexing
Lists: slicing
List comprehension: transform
List comprehension: filter
Dictionaries: access and get()
Dictionaries: iterate items()
Conditionals: if / elif / else
Loops: for with range()
Loops: while and break
Functions: def and return
String methods: split, strip, join
Sorting: sorted() with a key
Exception handling: try / except
Nested data: sum over a list of dicts
Generators: yield
Capstone: put it together

Start tutorial Open Python playground