Learn Python

Getting Started

Your first programs: print, comments, variables and input.

Numbers & Math

Integers, floats, operators, rounding and the math module.

Working with Text

Strings, indexing, slicing, methods and f-strings.

Making Decisions

Booleans, comparisons, if / elif / else and logical operators.

Loops

Repeat work with while and for loops, count with range(), steer loops with break and continue, and nest loops to build grids.

Lists & Tuples

Store sequences of values, grow and shrink them, slice and sort them, avoid copy bugs, and unpack tuples.

Dictionaries & Sets

Look things up by key, count and group data with dictionaries, and work with unique values using sets.

Functions

Package code into reusable functions: parameters, return values, defaults, *args and **kwargs, scope, lambdas and docstrings.

Comprehensions & Iteration

Build collections in one line with comprehensions, loop smarter with enumerate and zip, sort with keys, and stream values with generators.

Errors & Exceptions

Read tracebacks, handle exceptions, raise your own and debug with confidence.

Classes & Objects

Model things with classes, methods, properties, inheritance, dunder methods and dataclasses.

Standard Library Tour

Batteries included: imports, math, random, datetime, collections, itertools, json and re.

Algorithms & Problem Solving

Recursion, memoization, searching, sorting, big-O thinking and classic interview problems.

Mini Projects

Put it all together by building six small programs step by step: games, tools and reports.