Tkinter: AttributeError: NoneType object has no attribute <attribute name> Tkinter: AttributeError: NoneType object has no attribute <attribute name> tkinter tkinter

Tkinter: AttributeError: NoneType object has no attribute <attribute name>


The grid, pack and place functions of the Entry object and of all other widgets returns None. In python when you do a().b(), the result of the expression is whatever b() returns, therefore Entry(...).grid(...) will return None.

You should split that on to two lines like this:

entryBox = Entry(root, width=60)entryBox.grid(row=2, column=1, sticky=W)

That way you get your Entry reference stored in entryBox and it's laid out like you expect. This has a bonus side effect of making your layout easier to understand and maintain if you collect all of your grid and/or pack statements in blocks.


Change this line:

entryBox=Entry(root,width=60).grid(row=2, column=1,sticky=W)

into these two lines:

entryBox=Entry(root,width=60)entryBox.grid(row=2, column=1,sticky=W)

Just as you already correctly do for grabBtn!


For entryBox.get() to access get() method you need Entry object but Entry(root, width=60).grid(row=2, column=1, sticky=W) returns None.

entryBox = Entry(root, width=60) creates a new Entry Object.

Moreover, you won't needentryBox = entryBox.grid(row=2, column=1, sticky=W) as it will rewrite entryBox with None


Just replace entryBox = entryBox.grid(row=2, column=1, sticky=W)with

entryBox = Entry(root, width=60)entryBox.grid(row=2, column=1, sticky=W)