Learn to Code in 7 days
30 lessons · runs in your browser

Learn Python in 7 days

A complete beginner's course in the essentials of the language — from print() on Monday to classes, generators and a finished project by Sunday. Every example on this site is a Python program you can edit and run where it sits.

Start Day 1 Choose your level
Lessons
30
Days
7
Things to install
0
Python
3.14
This is not a screenshot — press Run Python
# Change anything here, then press Run. name = "Python" days = 7 for day in range(1, days + 1): print(f"Day {day}: learning {name}") print(f"\nThat is {days} days of {name}.")

Real Python, running in this tab. The first run downloads the interpreter; after that it is instant.

Three courses. Start where you are.

Each is seven modules — about two hours a day is a guide, not a deadline. Beginner and Intermediate build on each other; Advanced is for a narrower goal, designing code other developers call. Read the first line of each card and start at the first one that sounds like you.

  1. 1 Beginner Available

    Learn Python in 7 Days

    Write working programs, from print() to a finished project.

    This is you if
    You can't yet write a loop that reads a file and counts what's in it.
    You'll finish able to
    Write a complete program: functions, classes, files, errors and tests.
    Start Day 1 See the curriculum
  2. 2 Intermediate Pilot

    Writing Reliable Python

    Make programs that survive bad input and stay easy to change.

    This is you if
    Your programs work — but they break on bad input, or get hard to change.
    You'll finish able to
    Build a tested, maintainable tool that handles messy real-world input.
    Start Day 1 See the course
  3. 3 Advanced Pilot

    Designing Reliable Libraries

    Design code that other developers can use correctly.

    This is you if
    Other people use your code, and you decide what its API looks like.
    You'll finish able to
    Design a small library that is typed, documented, safe when things fail, and measured.
    Start Day 1 See the course

Between Beginner and Intermediate? Open the beginner capstone project. If you could have written it yourself — a dataclass, a JSON file, error handling and tests — you are ready for Intermediate.

Runnable, not readable

Every example is a live Python editor. Change the code, press Run, see what happens — the fastest way anyone has ever learned to program.

Nothing to install

Real CPython 3.14 compiled to WebAssembly runs inside your tab. No download, no PATH, no version conflicts — and nothing you write leaves your machine.

Essentials, in order

Twenty-eight lessons, each building on the last, chosen to cover what you actually need — and to leave out what you do not.

Exercises with answers

Each lesson ends with something to write yourself, and a worked solution that explains why it is written that way.

The beginner course, day by day

Each day is four short lessons and takes roughly two hours — a guess we're still checking with real learners. Do one a day for a week, or take each over two sittings: the order is what matters, not the pace. Lessons marked Explore are optional on a first pass.

The editor waits for you

These are not sandboxed toys. input() really blocks, tracebacks name real line numbers, and you can write files, import from the standard library, and split a program across several modules.

Run the program beside this and answer its questions — the prompt appears in the output, exactly as it would in a terminal.

  • Full standard library — json, csv, datetime, itertools
  • Real tracebacks with file names and line numbers
  • Multi-file projects with working imports
  • Nothing is uploaded; your code stays in the tab
Answer the question in the output Python
name = input("What is your name? ") year = int(input("What year were you born? ")) age = 2026 - year print(f"Hello {name}. You are about {age}.") if age >= 100: print("Which is impressive.")

Day 1 takes ninety minutes

Four lessons: printing, variables, strings, and reading input. By the end of them you will have written a program that asks a question and answers it.

Start with Hello, Python Just give me an editor