python - 为什么我收到 AttributeError : "' NoneType' object has no attribute 'get' "with Python and Tkinkter?

Question

from tkinter import *

app=Tk()

app.title(" BRAIN SYNCRONIZATION SOFTWARE ")

e1=Entry(app).pack()
t1=Text(app).pack()

def InputFun():
        file=open("acad.txt","a")
        file.write("%s;%s"%(t1.get("0.1",END),e1.get()))
        file.close()
b1=Button(app,text="INPUT",command=InputFun,height=3,width=4).pack(side=LEFT,padx=30,pady=30)

这是我写的代码，但是当我按下输入按钮时，我反复出现以下错误:

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python31\lib\tkinter\__init__.py", line 1399, in __call__
    return self.func(*args)
  File "C:\Users\vonn\Desktop\brain syncronization.py", line 15, in InputFun
    file.write("%s"%t1.get("0.1",END))
AttributeError: 'NoneType' object has no attribute 'get'

为什么不写入文件？

Answer 1

t1=Text(app).pack()

应该是

t1=Text(app)
t1.pack()

Tkinkter pack() 方法返回 None，你不能在上面运行 .get()，但需要保持 t1引用文本对象本身。