def __init__(self, flist=None, filename=None, key=None, root=None):
        if EditorWindow.help_url is None:
            dochome = os.path.join(sys.prefix, 'Doc', 'index.html')
            if sys.platform.count('linux'):
                pyver = 'python-docs-' + '%s.%s.%s' % sys.version_info[:3]
                if os.path.isdir('/var/www/html/python/'):
                    dochome = '/var/www/html/python/index.html'
                else:
                    basepath = '/usr/share/doc/'
                    dochome = os.path.join(basepath, pyver, 'Doc', 'index.html')
            elif sys.platform[:3] == 'win':
                chmfile = os.path.join(sys.prefix, 'Doc', 'Python%s.chm' % _sphinx_version())
                if os.path.isfile(chmfile):
                    dochome = chmfile
            elif macosxSupport.runningAsOSXApp():
                dochome = os.path.join(sys.prefix, 'Resources/English.lproj/Documentation/index.html')
            dochome = os.path.normpath(dochome)
            if os.path.isfile(dochome):
                EditorWindow.help_url = dochome
                if sys.platform == 'darwin':
                    EditorWindow.help_url = 'file://' + EditorWindow.help_url
            else:
                EditorWindow.help_url = 'http://docs.python.org/%d.%d' % sys.version_info[:2]
        currentTheme = idleConf.CurrentTheme()
        self.flist = flist
        root = root or flist.root
        self.root = root
        try:
            sys.ps1
        except AttributeError:
            sys.ps1 = '>>> '

        self.menubar = Menu(root)
        self.top = top = WindowList.ListedToplevel(root, menu=self.menubar)
        if flist:
            self.tkinter_vars = flist.vars
            self.top.instance_dict = flist.inversedict
        else:
            self.tkinter_vars = {}
            self.top.instance_dict = {}
        self.recent_files_path = os.path.join(idleConf.GetUserCfgDir(), 'recent-files.lst')
        self.text_frame = text_frame = Frame(top)
        self.vbar = vbar = Scrollbar(text_frame, name='vbar')
        self.width = idleConf.GetOption('main', 'EditorWindow', 'width')
        text_options = {'name': 'text',
           'padx': 5,
           'wrap': 'none',
           'width': self.width,
           'height': idleConf.GetOption('main', 'EditorWindow', 'height')
           }
        if TkVersion >= 8.5:
            text_options['tabstyle'] = 'wordprocessor'
        self.text = text = MultiCallCreator(Text)(text_frame, **text_options)
        self.top.focused_widget = self.text
        self.createmenubar()
        self.apply_bindings()
        self.top.protocol('WM_DELETE_WINDOW', self.close)
        self.top.bind('<<close-window>>', self.close_event)
        if macosxSupport.runningAsOSXApp():
            text.bind('<<close-window>>', self.close_event)
            text.bind('<Control-Button-1>', self.right_menu_event)
        else:
            text.bind('<3>', self.right_menu_event)
        text.bind('<<cut>>', self.cut)
        text.bind('<<copy>>', self.copy)
        text.bind('<<paste>>', self.paste)
        text.bind('<<center-insert>>', self.center_insert_event)
        text.bind('<<help>>', self.help_dialog)
        text.bind('<<python-docs>>', self.python_docs)
        text.bind('<<about-idle>>', self.about_dialog)
        text.bind('<<open-config-dialog>>', self.config_dialog)
        text.bind('<<open-module>>', self.open_module)
        text.bind('<<do-nothing>>', lambda event: 'break')
        text.bind('<<select-all>>', self.select_all)
        text.bind('<<remove-selection>>', self.remove_selection)
        text.bind('<<find>>', self.find_event)
        text.bind('<<find-again>>', self.find_again_event)
        text.bind('<<find-in-files>>', self.find_in_files_event)
        text.bind('<<find-selection>>', self.find_selection_event)
        text.bind('<<replace>>', self.replace_event)
        text.bind('<<goto-line>>', self.goto_line_event)
        text.bind('<<smart-backspace>>', self.smart_backspace_event)
        text.bind('<<newline-and-indent>>', self.newline_and_indent_event)
        text.bind('<<smart-indent>>', self.smart_indent_event)
        text.bind('<<indent-region>>', self.indent_region_event)
        text.bind('<<dedent-region>>', self.dedent_region_event)
        text.bind('<<comment-region>>', self.comment_region_event)
        text.bind('<<uncomment-region>>', self.uncomment_region_event)
        text.bind('<<tabify-region>>', self.tabify_region_event)
        text.bind('<<untabify-region>>', self.untabify_region_event)
        text.bind('<<toggle-tabs>>', self.toggle_tabs_event)
        text.bind('<<change-indentwidth>>', self.change_indentwidth_event)
        text.bind('<Left>', self.move_at_edge_if_selection(0))
        text.bind('<Right>', self.move_at_edge_if_selection(1))
        text.bind('<<del-word-left>>', self.del_word_left)
        text.bind('<<del-word-right>>', self.del_word_right)
        text.bind('<<beginning-of-line>>', self.home_callback)
        if flist:
            flist.inversedict[self] = key
            if key:
                flist.dict[key] = self
            text.bind('<<open-new-window>>', self.new_callback)
            text.bind('<<close-all-windows>>', self.flist.close_all_callback)
            text.bind('<<open-class-browser>>', self.open_class_browser)
            text.bind('<<open-path-browser>>', self.open_path_browser)
        self.set_status_bar()
        vbar['command'] = text.yview
        vbar.pack(side=RIGHT, fill=Y)
        text['yscrollcommand'] = vbar.set
        fontWeight = 'normal'
        if idleConf.GetOption('main', 'EditorWindow', 'font-bold', type='bool'):
            fontWeight = 'bold'
        text.config(font=(idleConf.GetOption('main', 'EditorWindow', 'font'),
         idleConf.GetOption('main', 'EditorWindow', 'font-size'),
         fontWeight))
        text_frame.pack(side=LEFT, fill=BOTH, expand=1)
        text.pack(side=TOP, fill=BOTH, expand=1)
        text.focus_set()
        usespaces = idleConf.GetOption('main', 'Indent', 'use-spaces', type='bool')
        self.usetabs = not usespaces
        self.tabwidth = 8
        self.indentwidth = self.tabwidth
        self.set_notabs_indentwidth()
        self.context_use_ps1 = False
        self.num_context_lines = (50, 500, 5000000)
        self.per = per = self.Percolator(text)
        self.undo = undo = self.UndoDelegator()
        per.insertfilter(undo)
        text.undo_block_start = undo.undo_block_start
        text.undo_block_stop = undo.undo_block_stop
        undo.set_saved_change_hook(self.saved_change_hook)
        self.io = io = self.IOBinding(self)
        io.set_filename_change_hook(self.filename_change_hook)
        self.recent_files_menu = Menu(self.menubar)
        self.menudict['file'].insert_cascade(3, label='Recent Files', underline=0, menu=self.recent_files_menu)
        self.update_recent_files_list()
        self.color = None
        if filename:
            if os.path.exists(filename) and not os.path.isdir(filename):
                io.loadfile(filename)
            else:
                io.set_filename(filename)
        self.ResetColorizer()
        self.saved_change_hook()
        self.set_indentation_params(self.ispythonsource(filename))
        self.load_extensions()
        menu = self.menudict.get('windows')
        if menu:
            end = menu.index('end')
            if end is None:
                end = -1
            if end >= 0:
                menu.add_separator()
                end = end + 1
            self.wmenu_end = end
            WindowList.register_callback(self.postwindowsmenu)
        self.askyesno = tkMessageBox.askyesno
        self.askinteger = tkSimpleDialog.askinteger
        self.showerror = tkMessageBox.showerror
        return