小编Noo*_*3rd的帖子

当我尝试将焦点设置在条目小部件上时，我收到错误，

Traceback (most recent call last):
  File "C:/PythonPrograms/Tkinter/test_case.py", line 13, in <module>
    entSearch.focus()
AttributeError: 'NoneType' object has no attribute 'focus'

通过在堆栈溢出上搜索此错误的其他出现情况，修复似乎是在单独的行上调用网格方法。

entSearch = Entry(main, textvariable = text, width = 50, font='arial 12')
entSearch = entSearch.grid(row = 0, column = 1, sticky=W)

而不是

entSearch = Entry(main,
                  textvariable = text,
                  width = 50, 
                  font='arial 12').grid(row = 0, column = 1, sticky=W)

不幸的是这个修复对我不起作用。

from tkinter import *

main = Tk()
main.title("Test Case")
main.geometry('750x750')
main.configure(background='ivory3')

text = StringVar()

entSearch = Entry(main, textvariable = text, …