Guido van Rossum

Mypy. I built a tool that finds type mistakes in Python code automatically.

Python Enhancement Proposals. I built a public record of how Python gets designed and improved.

Typeagent. I made a way to organize documents so AI can search and understand them.

Faster CPython. I'm tracking work to make Python's core engine run faster.

ABC. I preserved the original ABC language that directly inspired Python.

Mypy Extensions. I wrote extensions that add missing type-checking features to Python.

Guido's Site. I made a website to share my thoughts and projects.

Pythonlabs. I reconstructed the source code for pythonlabs.com.

Pegen. I made a text parser generator that powers Python's own code reader.

C Parser. I wrote a tool that reads and breaks down C code into usable pieces.

Pattern Matching. I built pattern matching for Python to simplify how developers handle data.

Typed AST. I made a code parser that extracts type hints from Python comments.

Python Demos. I rescued old Python example programs that were removed from the official repository.

Ctok. I exposed Python's built-in code tokenizer as a simple tool.

PEP 550. I documented early ideas about Python's approach to concurrent context.

Ballot Box. I built a voting tool that collects and counts group decisions automatically.

Pythonlabs Azure. I set up a Python website running on Microsoft Azure's cloud.

Guido's Time Machine. I built a tool that lets you rewind and replay Python code execution.

Mypy Dummy. I made a test version of a Python code checker.