# program saved as wolgui.py
from tkinter import *
Window = Tk()
Window.title("WolframAlpha")
Window.geometry("540x590")

'''menu = Menu(Window)
item = Menu(menu)
item.add_command(label='New')
menu.add_cascade(label='Execute once more', menu=item)
Window.config(menu=menu)'''
lbl = Label(Window, text = "Ask WolframAlpha")
lbl.grid()
txt = Entry(Window, width=10)
txt.grid(column =1, row =0)


def click():
    resu =  Entry(Window,bd=5)
    #Window.mainloop()
    import wolframalpha
    client = wolframalpha.Client('YOUR_CLIENT_ID')
    result = client.query(resu)
    output = next(result.results).text
    

# button widget with blue color text inside
# Set Button.grid
btn = Button(Window, text = "Click me for the answer" ,fg = "blue",command=click)
btn.grid(column=2, row=0)

lbl2 = Label(Window, text = "Answer: ")
lbl2.grid()
txt2 = Entry(output, width=10)
txt2.grid(column =1, row =0)
lbl2.grid()

Window.mainloop()

为什么我得到这个traceback？？

Traceback (most recent call last):
  File "wolgui.py", line 38, in <module>
    txt2 = Entry(output, width=10)
NameError: name 'output' is not defined

***Repl Closed***

我想我已经导入了这个函数-那么我应该重写/再次导入它吗？？还是压痕问题？原谅我的无知-我在Python中不是太多产...