Programming Tutorials

Free, open source, versioned

Learn a language as it is today, not as it was in 2014.

Every lesson names the release it was written against, marks the features that need a newer one, and is rechecked when a new version ships.

Start with PythonBrowse 644 languages
describe.py
def describe(point):
    match point:
        case (0, 0):
            return "origin"
        case (x, 0):
            return f"on the x axis at {x}"
        case _:
            return "somewhere else"
A lesson sample. Structural pattern matching arrived in Python 3.10, so the lesson says so next to the code, not in a changelog.

The path through a language

Every language follows the same four levels, so what you learn about reading one curriculum carries over to the next.

  1. Beginner

    Read and write small programs with confidence.

  2. Intermediate

    Structure larger programs and use the standard library well.

  3. Advanced

    Concurrency, performance, the type system and tooling.

  4. Expert

    Internals, design trade-offs and the corners of the spec.

Ideas that do not belong to one language, such as variables, control flow, recursion and what a type is, are taught once in the fundamentals track. Each language lesson links back to the ones it builds on and then teaches only what is specific to that language.

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The most widely used languages get the full curriculum first.

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