代碼如下所示，但未重新定位條目小部件位置，也未創(chuàng)建標簽。在輸入此代碼之前 [ e1.grid(row=1,column=1) ] 程序工作正常，輸入代碼后不工作，如何處理這個問題..該程序是try :import tkinter as tk # Python 3except :import Tkinter as tk # Python 2def update_sum() :# Sets the sum of values of e1 and e2 as val of e3try : sum_tk.set((float(e1_tk.get().replace(' ', '')) + float(e2_tk.get().replace(' ', ''))))except : passroot.after(10, update_sum) # reschedule the eventreturnroot = tk.Tk()root.geometry('850x450')e1_tk = tk.StringVar(root) # Initializes a text variable of tk to use to get e1's val.e2_tk = tk.StringVar(root) # Initializes a text variable of tk to use to get e2's val.sum_tk = tk.StringVar(root) # Initializes a text variable of tk to use to set e3's val.# Entriese1 = tk.Entry(root, textvariable = e1_tk)e1.grid(row=1,column=1)e2 = tk.Entry(root, textvariable = e2_tk)e2.grid(row=1,column=2)e3 = tk.Entry(root, textvariable = sum_tk)e3.grid(row=1,column=3)e1=Label(root,text="SL")e1.grid(row=1,column=0)e1.pack()e2.pack()e3.pack()# Will update the sum every second 10 ms = 0.01 second it takes ms as arg.root.after(10, update_sum)root.mainloop()提前致謝..
1 回答
慕少森
TA貢獻2019條經(jīng)驗 獲得超9個贊
您對 2 個小部件使用相同的變量并在其上使用網(wǎng)格函數(shù)
Grid 和 pack 是兩個內(nèi)置布局管理器，包括 place
我們只能在單個元素上使用其中之一
在您的程序中，您正在打包e1、e2、e3并嘗試為它們提供網(wǎng)格布局。
此外，您還使用了e1.grid()兩次不同的列值。
try :
import tkinter as tk # Python 3
except :
import Tkinter as tk # Python 2
def update_sum() :
# Sets the sum of values of e1 and e2 as val of e3
try :
sum_tk.set((float(e1_tk.get().replace(' ', '')) + float(e2_tk.get().replace(' ', ''))))
except :
pass
root.after(10, update_sum) # reschedule the event
return
root = tk.Tk()
root.geometry('850x450')
e1_tk = tk.StringVar(root) # Initializes a text variable of tk to use to get e1's val.
e2_tk = tk.StringVar(root) # Initializes a text variable of tk to use to get e2's val.
sum_tk = tk.StringVar(root) # Initializes a text variable of tk to use to set e3's val.
# Entries
e1 = tk.Entry(root, textvariable = e1_tk)
e1.grid(row=1,column=1)
e2 = tk.Entry(root, textvariable = e2_tk)
e2.grid(row=1,column=2)
e3 = tk.Entry(root, textvariable = sum_tk)
e3.grid(row=1,column=3)
e4=tk.Label(root,text="SL")
e4.grid(row=1,column=0)
# Will update the sum every second 10 ms = 0.01 second it takes ms as arg.
root.after(10, update_sum)
root.mainloop()
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