Пытаюсь создать редактор кода

from tkinter import *
from tkinter.filedialog import askopenfile, asksaveasfile
from tkinter.messagebox import showerror
 
class Main(object):
 
    def __init__(self, event, *args):    
        """docstring for Main"""
        super(Main, self, event).__init__(*args)
        FILE_NAME = NONE
        self.Window = args
        self.button = args
        self.main = args
 
        self.open_file = args
        self.save_file = event
        self.SaveAs = args
        self.new_file = event
 
    def Window(self):
        self.root = Toplevel()
 
        self.label=Label(self.root, text="place for creating object :")
 
        self.text2 = Text(self.root, width=16,height=1)
 
        self.btn = Button(self.root,text="create")
 
        text2.grid(row=0,column=0)
        btn.grid(row=0,column=1)
        btn.bind("<Button-1>",button)
        self.menubar2 = Menu(root)
        self.btn2 = Menu(menubar2, tearoff = 0)
        btn2.add_command(title="close", command=root.quit)
 
        menubar2.add_cascade(title="close", menu=btn2)
 
        root.mainloop()
    
    def open_file(self):
        self.inp = askopenfile(mode="r")
        if inp is None:
            return
        FILE_NAME = inp.name
 
        self.data = inp.read()
        text.delete('1.0', END)
        text.insert('1.0', data)
 
    def save_file(self,event):
        self.data = text.get('1.0', END)
        self.out = open(FILE_NAME, 'w')
        out.write(data)
        out.close()
 
    def SaveAs(self):
        self.out = asksaveasfile(mode='w', defaultextension='.txt')
        self.data = text.get('1.0', END)
        try:
            out.write(data.rstrip())
        except Exception:
            self.showerror(title="Oops!", message="Unable to save file...."
 
    def new_file(self): # тут пишет ошибку(внизу напишу ошибку)
        FILE_NAME="Untitled"
        text.delete('1.0', tkinter.END)
 
    def main(self):
        self.mainw= Tk()
        mainw.title("TextEdit")
        mainw.geometry("600x700")
        
        self.text2 = Text(mainw)
 
        self.menubar = Menu(mainw)
        self.filemenu = Menu(menubar, tearoff = 0)
        filemenu.add_command(title="Open...", command=open_file)
        filemenu.add_command(title="Save...", command=save_file)
        filemenu.add_command(title="Save As...",command=SaveAs)
        filemenu.add_command(title="New...", command=new_file)
        filemenu.add_separator()
        filemenu.add_command(title="Shablon of PyQt5", command=Window)
        filemenu.add_separator()
        filemenu.add_command(title="Quit",command=mainw.quit)
        
        menubar.add_cascade(title="File...", menu=filemenu)
        mainw.mainloop()
 
    def button(self,event):
        pass
 
if __name__ == '__main__':
    Main()