python tkinter界面如何创建一个新的以显示txt文件

我正在尝试相同的东西但有一个输出

import tkinter.ttk as ttk
import tkMessageBox

root = Tk()
root.geometry("500x300")
root.title("The Gatway company")

ivn = StringVar()
inputVarName = Entry(root, textvariable=str(ivn))
ivn.set(str("text1"))
inputVarName.grid(row=0, column=0,columnspan=2)
def writetofile():
    content_list = [ivn.get()]
    if any(content_list):


        with open("help.txt", 'r+') as inFile:
            for item in content_list:
                if ("%s\n" % item).encode('UTF-8') in inFile:
                    tkMessageBox.showwarning("Warning", "'%s': Already exists!" % item)
                    return

        with open("help.txt", "a") as f:
            for item in content_list:
                f.write( ("%s\n" % item).encode('UTF-8'))

    ivn.set('')

def showfile():
    top = Toplevel()
    top.title("help.txt")
    textArea = Text(top)

    scrollbar = ttk.Scrollbar(top, command=textArea.yview)
    scrollbar.grid(row=0, column=1, sticky='nsew')

    textArea['yscrollcommand'] = scrollbar.set

    with open("help.txt", "r") as infile:
        textArea.insert(END, infile.read())

    textArea.grid(row=0, column=0)
    textArea.config(state=DISABLED)

applyButton = Button(root, text="Apply", command=writetofile)
applyButton.grid(row=2, column=0, sticky=W+E)
applyButton.config( height = 5, width = 10 )

showButton = Button(root, text="Show", command=showfile)
showButton.grid(row=2, column=1, sticky=W+E)
showButton.config( height = 5, width = 10 ) 



root.mainloop()

它与您的代码相同，但是对于一个条目，我正在考虑以一种用户可以像文件请求者一样选择help.txt文件的方式对其进行编辑。