Sublime Text plugin to add, remove, or toggle packages in the ignored_packages setting

AlterIgnoredPackages.py

#
# Save as AlterIgnoredPackages.py in your user packages directory.
# e.g. ~/.config/sublime-text-3/Packages/User/AlterIgnoredPackages.py
#
# Here are some key binding examples:
# 
# {
#     "keys": ["ctrl+k", "ctrl+z"],
#     "command": "alter_ignored_packages",
#     "args": {"add_list": ["PackageName1"], 
#              "remove_list": ["PackageName2", "PackageName3"] } 
# },
# {
#     "keys": ["ctrl+k", "ctrl+shift+z"],
#     "command": "alter_ignored_packages",
#     "args": {"toggle_list": ["PackageName"] }
# },
#

import sublime
import sublime_plugin

class AlterIgnoredPackagesCommand(sublime_plugin.ApplicationCommand):

    def run(self, add_list=[], remove_list=[], toggle_list=[]):

        preferences = sublime.load_settings("Preferences.sublime-settings")
        ignored_packages = preferences.get("ignored_packages", [])

        for package_name in add_list:
            if package_name not in ignored_packages:
                ignored_packages.append(package_name)

        for package_name in remove_list:
            if package_name in ignored_packages:
                ignored_packages.remove(package_name)

        for package_name in toggle_list:
            if package_name in ignored_packages:
                ignored_packages.remove(package_name)
            else:
                ignored_packages.append(package_name)

        preferences.set("ignored_packages", ignored_packages)
        sublime.save_settings("Preferences.sublime-settings")

        # Unfortunately the automatic ST reloading settings
        # message overwrites this message a bit too quickly.
        message = "ignored_packages: " + str(ignored_packages)
        sublime.status_message(message)

        # Code to overwrite the automatic ST reloading settings status
        # message with the plugin's status message. If using comment out
        # the sublime.status_message(message) line above and adjust the
        # delay as needed (e.g. 500 ms is not long enough on my system).
        #
        # timeout_in_milli_seconds = 1000
        # sublime.set_timeout_async(lambda: sublime.status_message(message),
        #                                   timeout_in_milli_seconds)