Python 为什么我的Tkinter小部件存储为None?
我将我的按钮放入一个数组中,但当我调用它们时,它们不在那里。如果我打印出阵列,我会得到:Python 为什么我的Tkinter小部件存储为None?,python,button,dictionary,tkinter,Python,Button,Dictionary,Tkinter,我将我的按钮放入一个数组中,但当我调用它们时,它们不在那里。如果我打印出阵列,我会得到: {0: None, 1: None, 2: None, 3: None, 4: None, 5: None, 6: None, 7: None, ...} 我只是不知道我做错了什么 from tkinter import * def main(): pass if __name__ == '__main__': main() b={} app = Tk() app.grid()
{0: None, 1: None, 2: None, 3: None, 4: None, 5: None, 6: None, 7: None, ...}
我只是不知道我做错了什么
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()
每个Tkinter小部件的、和方法在适当的位置运行,并始终返回None
。这意味着您不能在创建小部件时在同一行调用它们。相反,应在以下行调用它们:
widget = ...
widget.grid(...)
widget = ...
widget.pack(...)
widget = ...
widget.place(...)
因此,在您的代码中,应该是:
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)