Python

BasicAdvanced

From your first line of Python through functions and collections to comprehensions, generators, the standard library, files and object-oriented programming.

modules

lessons

runnable exercises

Course contents

01Getting startedBasic

Hello, Python

Write and run your first Python program in a live sandbox.

Variables and types

Give values names, and meet Python’s basic types.

02Working with dataBasic

Numbers and math

Use Python as a calculator, and know int from float.

Strings

Build and inspect text with concatenation and f-strings.

String methods and slicing

Change and inspect text with built-in methods, and slice it.

03Logic and repetitionBasic

Making decisions

Branch your program with booleans and if / elif / else.

Repeating with loops

Repeat work with for and while, and build up a result.

Controlling loops

Skip an item with continue, leave early with break.

04FunctionsBasic

Writing functions

Package a block of work under a name and reuse it.

Parameters and return

Pass values in with parameters, get a value back with return.

Flexible arguments

Default values, keyword arguments, and taking any number of them.

Scope and lambdas

Where names live, and one-line throwaway functions.

05CollectionsBasic

Lists

Hold many values in order, and loop over them.

Tuples

Ordered collections that cannot be changed after they are made.

Dictionaries

Store key → value pairs and look values up by name.

Sets

Unordered collections of unique items, and the maths on them.

06Robust codeAdvanced

Handling errors

Catch failures with try / except instead of crashing.

Raising exceptions

Signal errors yourself, and clean up with finally.

07Comprehensions and iterationAdvanced

Comprehensions

Build a list, dict or set from another in a single expression.

Iterators and generators

How for loops work, and producing values lazily with yield.

08Modules and the standard libraryAdvanced

Modules and imports

Reuse code from other files and packages with import.

A standard-library tour

A quick look at math, random, datetime and json.

09FilesAdvanced

Reading and writing files

Save data to a file and read it back with open().

10Object-oriented PythonAdvanced

Classes and objects

Bundle data and behaviour together with your own types.

Inheritance

Build a new class on top of an existing one.

Ready when you are.

Opening a lesson takes an account. Nothing to install.