无法配置tkinter对象列表框

Question

当我运行此代码创建一个列表框并更改其外观时，我收到错误＆＃34;＆＃39; NoneType＆＃39;对象没有属性＆＃39; configure＆＃39;＆＃34;：

listbox = Listbox(myscreen).grid(row=1, column=0, sticky=NSEW, rowspan=2)
listbox.config(border=2, relief=SUNKEN)

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Answer 1

在放置列表框之前尝试配置它。

listbox = Listbox(myscreen)
listbox.config(border=2, relief=SUNKEN)
listbox.grid(row=1, column=0, sticky=NSEW, rowsoan=2)