Type: Jupyter Notebook Extension
Name: 2to3 Converter
Description: Converts python2 code in a notebook's code cell to python3 code
Link: README_2to3.md
Main: 2to3.js
Compatibility: Jupyter 4.x, 5.x
Parameters:

- name: 2to3.add_toolbar_button
  description: Add a toolbar button to convert the selected cell(s)
  input_type: checkbox
  default: true

- name: 2to3.button_icon
  description: |
    Toolbar button icon: a font-awesome class defining the icon used for the
    toolbar button. See https://fontawesome.com/icons for available icons.
  input_type: text
  default: 'fa-space-shuttle'

- name: 2to3.button_label
  description: Toolbar button label text
  input_type: text
  default: 'Code converter'

- name: 2to3.register_hotkey
  description: Register a hotkey to convert the selected cell(s)
  input_type: checkbox
  default: true

- name: 2to3.hotkeys.process_selected
  description: Hotkey to convert the selected cell(s) from python2 to python3
  input_type: hotkey
  default: 'Ctrl-M'

- name: 2to3.hotkeys.process_all
  description: Hotkey to convert the whole notebook
  input_type: hotkey
  default: 'Ctrl-Shift-M'

- name: 2to3.show_alerts_for_not_supported_kernel
  description: Show alerts if the kernel is not supported
  input_type: checkbox
  default: false

- name: 2to3.show_alerts_for_errors
  description: Show alerts for errors in the kernel converting calls
  input_type: checkbox
  default: true

- name: 2to3.kernel_config_map_json
  description: |
    kernel_config_map_json:
    json defining library calls required to load the kernel-specific
    converting modules, and the prefix & postfix for the json-format string
    required to make the converting call.
  input_type: textarea
  default: |
    {
      "python": {
        "library": "import lib2to3.refactor, json\n_2to3_refactoring_tool = lib2to3.refactor.RefactoringTool(\n    set(lib2to3.refactor.get_fixers_from_package('lib2to3.fixes')))\ndef _2to3_refactor_cell(src):\n    try:\n        tree = _2to3_refactoring_tool.refactor_string(src+'\\n', '<dummy_name>')\n    except (lib2to3.pgen2.parse.ParseError, lib2to3.pgen2.tokenize.TokenError):\n        return src \n    else:\n        return str(tree)[:-1]",
        "prefix": "print(json.dumps(refactor_cell(u",
        "postfix": ")))"
      }
    }