hydrogen-next

A package provide an interactive coding environment that supports Python, R, JavaScript and other Jupyter kernels.

Installation

To install hydrogen-next search for hydrogen-next in the Install pane of the Pulsar settings or run ppm install hydrogen-next. Alternatively, you can run ppm install asiloisad/pulsar-hydrogen-next to install a package directly from the GitHub repository.

Useful links

• https://github.com/nteract/hydrogen
• https://nteract.gitbooks.io/hydrogen/content/
• https://blog.nteract.io/hydrogen-interactive-computing-in-atom-89d291bcc4dd

Features

Features of hydrogen & hydrogen-next:

• Execute a line, selection, or block at a time.
• Rich media support for plots, images, and video.
• Watch expressions let you keep track of variables and re-run snippets after every change.
• Completions from the running kernel, just like autocomplete in the Chrome dev tools.
• Code can be inspected to show useful information provided by the running kernel.
• One kernel per language (so you can run snippets from several files, all in the same namespace).
• Interrupt or restart the kernel if anything goes wrong.
• Use a custom kernel connection (for example to run code inside Docker), read more in the "Custom kernel connection (inside Docker)" section.
• Cell marker are compatible with navigation-panel.

Features of hydrogen-next:

• Package works well in Pulsar and PulsarNext without rebuilding.
• Dependencies jmp & zeromq updated to latest version.
• Socket monitors fixed.
• Converted .ts and .tsx libs to java script.
• All configuration hydrogen. renamed to hydrogen-next..
• All commands hydrogen: renamed to hydrogen-next:.
• All styles hydrogen. renamed to hydrogen-next..
• Text editor context menu removed.
• Integrated hydrogen-run package.
• Integrated cell-navigation package.
• Evaluation of Python if|elif|else and try|except|else|finally fixed.
• Command Run supports multiple cursors & selections.
• Command Run is not trimmed to cell range.
• New command :open-examples added.
• Inspector workflow changed.
• Fixed notebook import command.

Alternative keymaps

You can disable the predefined keymap and use your own in keymap.cson. An example:

"atom-text-editor:not([mini])":
  "ctrl-enter" : "hydrogen-next:run"
  "shift-enter": "hydrogen-next:run-and-move-down"
  "f5"         : "hydrogen-next:run-all"
  "alt-f5"     : "hydrogen-next:recalculate-all"
  "shift-f5"   : "hydrogen-next:run-all-above"
  "ctrl-f5"    : "hydrogen-next:recalculate-all-above"
  "f6"         : "hydrogen-next:run-all-inline"
  "alt-f6"     : "hydrogen-next:recalculate-all-inline"
  "shift-f6"   : "hydrogen-next:run-all-above-inline"
  "ctrl-f6"    : "hydrogen-next:recalculate-all-above-inline"
  "f7"         : "hydrogen-next:run"
  "ctrl-f7"    : "hydrogen-next:run-cell"
  "alt-f7"     : "hydrogen-next:clear-and-center"
  "shift-f7"   : "hydrogen-next:interrupt-kernel"
  "f8"         : "hydrogen-next:run-and-move-down"
  "ctrl-f8"    : "hydrogen-next:run-cell-and-move-down"
  "alt-f8"     : "hydrogen-next:clear-and-restart"
  "shift-f8"   : "hydrogen-next:shutdown-kernel"

TODO

• Add Variable Explorer (like hydrogen-python).
• Fix Editor is not responsible when loading package.
• Add setting to swap keymaps set.
• Extend Python code to decorators.
• Fix line number of evaluation.

Contributing

Got ideas to make this package better, found a bug, or want to help add new features? Just drop your thoughts on GitHub — any feedback’s welcome!

Thanks to @mauricioszabo for showing me a way to get hydrogen to work in the latest Electron.