Why do my Tkinter widgets get stored as None?
button, dictionary, python, tkinter
Solution
The `grid`, `pack`, and `place` methods of every Tkinter widget operate in-place and always return `None`. This means that you cannot call them on the same line as you create a widget. Instead, they should be called on the line below:
widget = ...
widget.grid(...)
widget = ...
widget.pack(...)
widget = ...
widget.place(...)
So, in your code, it would be:
b[c+(r*10)] = Button(f, text=chr(97+c+(r*10)), command=lambda a=c+(r*10): color(a), borderwidth=1,width=5,bg="white")
b[c+(r*10)].grid(row=r,column=c)
Problem
I'm putting my buttons into an array but when I call them they are not there. If I print out the array I get: ``` {0: None, 1: None, 2: None, 3: None, 4: None, 5: None, 6: None, 7: None, ...} ``` I just don't know what I am doing wrong. ``` from tkinter import * def main(): pass if __name__ == '__main__': main() b={} app = Tk() app.grid() f = Frame(app, bg = "orange", width = 500, height = 500) f.pack(side=BOTTOM, expand = 1) def color(x): b[x].configure(bg="red") # Error 'NoneType' object has no attribute 'configure' print(b) # 0: None, 1: None, 2: None, 3: None, 4: None, 5:.... ect def genABC(): for r in range(3): for c in range(10): if (c+(r*10)>25): break print(c+(r*10)) b[c+(r*10)] = Button(f, text=chr(97+c+(r*10)), command=lambda a=c+(r*10): color(a), borderwidth=1,width=5,bg="white").grid(row=r,column=c) genABC() app.mainloop() ```