A browser copy of the RobotPy libraries

The Python exercises on the wiki run in the browser with Pyodide. The real RobotPy libraries are C++ with Python bindings, so they cannot load there. This folder is a small copy of them in plain Python. It has only the parts that the lesson 7 exercises use, and each part behaves like RobotPy 2026.

Folder	Copy of
wpilib/	Timer, SmartDashboard, SendableChooser, DriverStation, XboxController, TimedRobot, RobotController, Field2d
wpimath/	geometry, units, controller.PIDController, kinematics.ChassisSpeeds
commands2/	Command, Subsystem, CommandScheduler, the command groups, WaitCommand, button.Trigger
phoenix6/	hardware, configs, controls, signals (devices that do nothing, as in simulation)
wpilibextra/	An exact copy of robot/wpilibextra from Robot-2026 (tracking-hub), without remote_shell.py
cz_sim.py	Helpers for the checks: move time, press buttons, run a robot. Not part of RobotPy

An exercise uses it with library: robotpy in its YAML file. The page then loads every file in manifest.json before it runs the code, and loads them again for each run, so each run starts with a new scheduler and a clock at 0.

If you add a file here, add it to manifest.json.

How we know it behaves like RobotPy

tools/validate-robotpy-browser.py runs the checks of each lesson 7 exercise two times: one time with this copy, and one time with the real RobotPy 2026. tools/robotpy-browser/real/cz_sim.py gives the checks the same helpers on top of the real wpilib.simulation. Both runs must pass. Run it after you change this folder or a lesson 7 exercise.