NerdTree-like behavior for Sublime Text 2

NerdTree.py

import sublime, sublime_plugin

class NerdTreeCommand(sublime_plugin.WindowCommand):
    def run(self):
        self.window.run_command("toggle_side_bar")
        self.window.run_command("focus_side_bar")

I use 'nt' in Vim to toggle NerdTree; in ST2, to avoid any conflict, use 'nt' to open and 'tn' to close the sidebar (and return focus to group 0).

import sublime, sublime_plugin

class NerdTreeCommand(sublime_plugin.WindowCommand):
    def run(self):
        was_visible = self.window.is_sidebar_visible()
        self.window.run_command("toggle_side_bar")
        if was_visible:
          self.window.run_command("focus_group", { "group": 0 })
        else:
          self.window.run_command("focus_side_bar")