为什么我的Tkinter的部件得到存储为无? [英] Why do my Tkinter widgets get stored as None?

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问题描述

我把我的按钮到一个数组,但是当我打电话给他们,他们不存在。如果我打印出数组我得到:

  {0:无,1:无,2:无,3:无,4:无,5:无,6:无,7:没有,...}

我不知道我做错了。

 从Tkinter的进口*高清的main():
    通过如果__name__ =='__main__':
    主要()B = {}应用= TK()
app.grid()F =帧(应用程序,BG =橙色,宽度= 500,高度= 500)
f.pack(边=底部,展开= 1)
DEF颜色(X):
   B〔X] .configure(BG =红)#错误NoneType'对象有没有属性'配置'
   打印(二)#0:无,1:无,2:无,3:无,4:无,5:....等
高清genABC():
    对于在范围r(3):
        对中的c的范围(10):
            如果(C +(R * 10)→25):
                打破
            打印(C +(R * 10))
            B〔C +(R * 10)] =按钮(F,文本= CHR(97 + C +(R * 10)),命令=拉姆达一个= C +(R * 10):颜色(a)中,边框宽度= 1,宽度= 5,BG =白)。格(行= R,列= C)genABC()
app.mainloop()


解决方案

电网 地方 每一个部件的Tkinter方法​​就地操作的 的并始终返回。这意味着,当你创建一个小部件,你不能叫他们在同一行。相反,他们应该叫下面的一行:

 部件= ...
widget.grid(...)小部件= ...
widget.pack(...)小部件= ...
widget.place(...)

所以,在你的code,这将是:

  B [C +(R * 10)] =按钮(F,文本= CHR(97 + C +(R * 10)),命令=拉姆达A = C +(R * 10 ):颜色(a)中,边框宽度= 1,宽度= 5,BG =白色)
B〔C +(R * 10)]。电网(行= R,列= C)

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()

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)

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