Hydrogen 2.0 (H2O)
⚠️ Breaking Changes
Support multiple independent kernels #1008, #40
Three commands to start a new kernel:
- "Start Local Kernel" (default when executing code in a new file)
- "Connect to Existing Kernel" (replaces "Switch Kernel")
- "Connect to Remote Kernel"
Main Changes:
- Kernels are indexed by file path
- By default a new ZMQ kernel is started when users runs code in a new file
- Users can connect multiple files to the same kernel via "Connect to Existing Kernel". This also supports remote kernels
- "Switch Kernel" command is removed since it's now obsolete
- "Select Kernel" command is renamed to "Start Local Kernel"
- New "Kernel Monitor" panel to manage all running kernels (open with "Toggle Kernel Monitor") :
Don't rely on jupyter to discover kernel specs #1031, #1039, #1046
This removes jupyter as a dependency and will significantly decrease startup time.
Main Changes:
- Remove Kernelspec setting. This setting was introduced because we ran into some issues where
jupyterwas not available from Atom. Editing this setting is a horrible user experience and everything can be achived by properly installing the kernels too. - Remove support for old python installations, relying on deprecated
ipythonkernel directories. - The default Python installation won't be discovered anymore. The IPython kernel needs to be installed with:
python -m pip install ipykernel python -m ipykernel install --user
🎉 Features
- Make text in panes (inspector, output, watch) copyable #1017, #1029
- Add setting to view output in dock by default #1022, #995
🐛 Bugs
- Refactor ws kernel picker to remove UI flickering #1011
- Fix watch pane not scrollable #1037, #1032
- Fix compatibility with Atom 1.22 #1036, #1034
📝 Documentation
- Add
kotlin-jupyterto the list of supported kernels #1019