在 Tkinter Python 中的第一次迭代后，销毁函数没有有效地销毁帧

Question

我已经构建了一个代码，在 for 循环中保存每次迭代时计算的数据，结果存储在 3 个不同的 csv 文件中。这些保存的结果在另一个 python 代码中读取，该代码使用 GUI tkinter 在包含三个不同帧的窗口上显示结果。这三帧完美地每 3 秒更新一次。

我在三个框架中的每一个上都添加了一个“关闭”按钮，按下该按钮时应该只销毁/关闭特定框架。在第一次迭代中，当我按下三个框架中的任何一个上的关闭按钮时，框架的破坏/关闭就完美地完成了。但是，当时间移动并且完成超过 1 次迭代时，关闭按钮不会立即关闭。

例如，假设已经完成了 3 次迭代和计算，所以当我按下关闭按钮时，它将在第四次按下时关闭，而在此之前，当按下它时，框架将显示之前显示的 PREVIOUS 结果迭代..如何编辑？我在下面附上了我的代码。

import random
from tkinter import*
import tkinter as tk
import csv
import numpy as np
import time
base = tk.Tk()
base.geometry("500x300")

frame1 = tk.LabelFrame(base, text="MVs ", width=240, height=330, bd=15)
frame2 = tk.LabelFrame(base, text="CVs ", width=240, height=330, bd=15)
frame3 = tk.LabelFrame(base, text="DVs ", width=240, height=330, bd=15)

def MVs():
    #read files from saved excel sheets

    MV=np.empty(8)

    with open("MVs.csv","r") as csv_file:

        count=0

        csv_reader=csv.reader(csv_file)
        for row in csv_reader:
            i=row[0]#change from string to float type
            MV[count]=i #update y array
            count +=1 # increment of 1 to get the number of total values

        MV=MV.reshape(8,1)


    frame1 = tk.LabelFrame(base, text="MVs", width=240, height=330, bd=15)


    frame1.grid(row=1, column=0,  padx=8)

    #Display row titles
    def exit_btn():

        frame1.destroy()
        #frame1.update()

    btn1_c=Button(frame1,text="Close",command=exit_btn).grid(column=1,columnspan=1,row=10,rowspan=1, sticky=W)    
    Label(frame1,text="Tc Measured").grid(column=0,columnspan=1,row=2,rowspan=1, sticky=W)
    Label(frame1,text="Tc Optimum").grid(column=0,columnspan=1,row=3,rowspan=1, sticky=W)
    Label(frame1,text="Tc Cost").grid(column=0,columnspan=1,row=4,rowspan=1, sticky=W)
    Label(frame1,text="Tc Weight").grid(column=0,columnspan=1,row=5,rowspan=1, sticky=W)

    Label(frame1,text="Q Measured").grid(column=0,columnspan=1,row=6,rowspan=1, sticky=W)
    Label(frame1,text="Q Optimum").grid(column=0,columnspan=1,row=7,rowspan=1, sticky=W)
    Label(frame1,text="Q Cost").grid(column=0,columnspan=1,row=8,rowspan=1, sticky=W)
    Label(frame1,text="Q Weight").grid(column=0,columnspan=1,row=9,rowspan=1, sticky=W)

    for i in range(8):
        Label(frame1,text= str(round(MV[i,0],5))).grid(column=1 ,columnspan=1,row=i+2,rowspan=1, sticky=W)


def CVs():

    CV=np.empty(8)

    with open("CVs.csv","r") as csv_file:

        count=0

        csv_reader=csv.reader(csv_file)
        for row in csv_reader:
            i=row[0]#change from string to float type
            CV[count]=i #update y array
            count +=1 # increment of 1 to get the number of total values

        CV=CV.reshape(8,1)

    frame2 = tk.LabelFrame(base, text="CVs", width=240, height=330, bd=15)

    frame2.grid(row=1, column=3,  padx=8)

    def exit_btn():

        frame2.destroy()
       # frame2.update()

    #Display row titles
    btn2_c=Button(frame2,text="Close",command=exit_btn).grid(column=3,columnspan=1,row=10,rowspan=1, sticky=W)    
    Label(frame2,text="T Measured").grid(column=3,columnspan=1,row=2,rowspan=1, sticky=W)
    Label(frame2,text="T Optimum").grid(column=3,columnspan=1,row=3,rowspan=1, sticky=W)
    Label(frame2,text="T Revenue").grid(column=3,columnspan=1,row=4,rowspan=1, sticky=W)
    Label(frame2,text="T Weight").grid(column=3,columnspan=1,row=5,rowspan=1, sticky=W)

    Label(frame2,text="Ca Measured").grid(column=3,columnspan=1,row=6,rowspan=1, sticky=W)
    Label(frame2,text="Ca Optimum").grid(column=3,columnspan=1,row=7,rowspan=1, sticky=W)
    Label(frame2,text="Ca Revenue").grid(column=3,columnspan=1,row=8,rowspan=1, sticky=W)
    Label(frame2,text="Ca Weight").grid(column=3,columnspan=1,row=9,rowspan=1, sticky=W)

    for i in range(8):
        Label(frame2,text= str(round(CV[i,0],5))).grid(column=4 ,columnspan=1,row=i+2,rowspan=1, sticky=W)

def DVs():

    dist=np.empty(1)

    with open("disturbance.csv","r") as csv_file:

        count=0

        csv_reader=csv.reader(csv_file)
        for row in csv_reader:
            i=row[0]#change from string to float type
            dist[count]=i #update y array
            count +=1 # increment of 1 to get the number of total values

        dist=dist.reshape(1,1)

    frame3 = tk.LabelFrame(base, text="DVs ", width=240, height=330, bd=15)

    frame3.grid(row=1, column=5,  padx=8)

    def exit_btn():

        frame3.destroy()
       # frame3.update()

    btn3_c=Button(frame3,text="Close",command=exit_btn).grid(column=5,columnspan=1,row=3,rowspan=1, sticky=W)    
    Label(frame3,text="Q Loss").grid(column=5,columnspan=1,row=2,rowspan=1, sticky=W)
    Label(frame3,text= str(round(dist[0,0],3))).grid(column=6 ,columnspan=1,row=2,rowspan=1, sticky=W)


btn1=Button(base,text='MVs',command=MVs)
btn2=Button(base,text='CVs',command=CVs)
btn3=Button(base,text='DVs',command=DVs)

btn1.grid(row=0,column=0)
btn2.grid(row=0,column=3)
btn3.grid(row=0,column=5)


i=0
show=True
#show results

while(show==True):

    #base.after(i, MVs) #in ms
    frame1.after(i, MVs)
    #frame1.after(i+100,frame1.destroy)
    #base.after(i, CVs) #in ms
    frame2.after(i, CVs)
    #frame2.after(i+100,frame2.destroy)
    #base.after(i, DVs) #in ms
    frame3.after(i, DVs)
    #frame3.after(i+100,frame3.destroy)

    base.update()#update display

    i=i+3000

base.mainloop()

Answer 1

我找到了解决这个问题的方法。然而，一个新的问题出现了..

基本上，我在 MVs 函数中定义了 frame1。我删除了它并仅在开始时保留它。对 frame2 和 frame3 采用了相同的方法。这样，当我按下关闭按钮时，相应的框架会立即关闭。但是，现在当我关闭 frame1 时，当我再次按下 MVs 按钮时，frame1 不会再次打开。它给了我一个错误：

_tkinter.TclError: bad window path name ".!labelframe"

如果我不按关闭按钮，则不会发生此问题。因此，问题肯定来自于销毁和关闭框架。

我在这里附上了我编辑的代码：

import random
from tkinter import*
import tkinter as tk
import csv
import numpy as np
import time
base = tk.Tk()
base.geometry("500x300")



frame1 = tk.LabelFrame(base, text="MVs ", width=240, height=330, bd=15)
frame1.grid(row=1, column=0,  padx=8)


frame2 = tk.LabelFrame(base, text="CVs ", width=240, height=330, bd=15)
frame2.grid(row=1, column=3,  padx=8)

frame3 = tk.LabelFrame(base, text="DVs ", width=240, height=330, bd=15)
frame3.grid(row=1, column=5,  padx=8)


z=False

def MVs():
    #read files from saved excel sheets

    global z
    global frame1

    if z==True:

        frame1 = tk.LabelFrame(base, text="MVs", width=240, height=330, bd=15)

        frame1.grid(row=1, column=0,  padx=8)

    MV=np.empty(8)

    with open("MVs.csv","r") as csv_file:

        count=0

        csv_reader=csv.reader(csv_file)
        for row in csv_reader:
            i=row[0]#change from string to float type
            MV[count]=i #update y array
            count +=1 # increment of 1 to get the number of total values

        MV=MV.reshape(8,1)


    #Display row titles
    def exit_btn():

        z=True
        frame1.destroy()
        frame1.update()

    if z==False:

        Label(frame1,text="Tc Measured").grid(column=0,columnspan=1,row=2,rowspan=1, sticky=W)
        Label(frame1,text="Tc Optimum").grid(column=0,columnspan=1,row=3,rowspan=1, sticky=W)
        Label(frame1,text="Tc Cost").grid(column=0,columnspan=1,row=4,rowspan=1, sticky=W)
        Label(frame1,text="Tc Weight").grid(column=0,columnspan=1,row=5,rowspan=1, sticky=W)

        Label(frame1,text="Q Measured").grid(column=0,columnspan=1,row=6,rowspan=1, sticky=W)
        Label(frame1,text="Q Optimum").grid(column=0,columnspan=1,row=7,rowspan=1, sticky=W)
        Label(frame1,text="Q Cost").grid(column=0,columnspan=1,row=8,rowspan=1, sticky=W)
        Label(frame1,text="Q Weight").grid(column=0,columnspan=1,row=9,rowspan=1, sticky=W)

        for i in range(8):
            Label(frame1,text= str(round(MV[i,0],5))).grid(column=1 ,columnspan=1,row=i+2,rowspan=1, sticky=W)

        btn1_c=Button(frame1,text="Close",command=exit_btn).grid(column=1,columnspan=1,row=10,rowspan=1, sticky=W)

def CVs():

    global z
    global frame2

    if z==True:

        frame2 = tk.LabelFrame(base, text="CVs", width=240, height=330, bd=15)

        frame2.grid(row=1, column=3,  padx=8)

    CV=np.empty(8)

    with open("CVs.csv","r") as csv_file:

        count=0

        csv_reader=csv.reader(csv_file)
        for row in csv_reader:
            i=row[0]#change from string to float type
            CV[count]=i #update y array
            count +=1 # increment of 1 to get the number of total values

        CV=CV.reshape(8,1)

    #frame2 = tk.LabelFrame(base, text="CVs", width=240, height=330, bd=15)

    #frame2.grid(row=1, column=3,  padx=8)

    def exit_btn():

        z=True
        frame2.destroy()
        frame2.update()

    #Display row titles

    Label(frame2,text="T Measured").grid(column=3,columnspan=1,row=2,rowspan=1, sticky=W)
    Label(frame2,text="T Optimum").grid(column=3,columnspan=1,row=3,rowspan=1, sticky=W)
    Label(frame2,text="T Revenue").grid(column=3,columnspan=1,row=4,rowspan=1, sticky=W)
    Label(frame2,text="T Weight").grid(column=3,columnspan=1,row=5,rowspan=1, sticky=W)

    Label(frame2,text="Ca Measured").grid(column=3,columnspan=1,row=6,rowspan=1, sticky=W)
    Label(frame2,text="Ca Optimum").grid(column=3,columnspan=1,row=7,rowspan=1, sticky=W)
    Label(frame2,text="Ca Revenue").grid(column=3,columnspan=1,row=8,rowspan=1, sticky=W)
    Label(frame2,text="Ca Weight").grid(column=3,columnspan=1,row=9,rowspan=1, sticky=W)

    for i in range(8):
        Label(frame2,text= str(round(CV[i,0],5))).grid(column=4 ,columnspan=1,row=i+2,rowspan=1, sticky=W)

    btn2_c=Button(frame2,text="Close",command=exit_btn).grid(column=3,columnspan=1,row=10,rowspan=1, sticky=W)   

def DVs():

    dist=np.empty(1)

    with open("disturbance.csv","r") as csv_file:

        count=0

        csv_reader=csv.reader(csv_file)
        for row in csv_reader:
            i=row[0]#change from string to float type
            dist[count]=i #update y array
            count +=1 # increment of 1 to get the number of total values

        dist=dist.reshape(1,1)

    #frame3 = tk.LabelFrame(base, text="DVs ", width=240, height=330, bd=15)

    #frame3.grid(row=1, column=5,  padx=8)

    def exit_btn():

        frame3.destroy()
        frame3.update()

    btn3_c=Button(frame3,text="Close",command=exit_btn).grid(column=5,columnspan=1,row=3,rowspan=1, sticky=W)    
    Label(frame3,text="Q Loss").grid(column=5,columnspan=1,row=2,rowspan=1, sticky=W)
    Label(frame3,text= str(round(dist[0,0],3))).grid(column=6 ,columnspan=1,row=2,rowspan=1, sticky=W)


btn1=Button(base,text='MVs',command=MVs)
btn2=Button(base,text='CVs',command=CVs)
btn3=Button(base,text='DVs',command=DVs)

btn1.grid(row=0,column=0)
btn2.grid(row=0,column=3)
btn3.grid(row=0,column=5)


i=0
show=True
#show results

while(show==True):

    #base.after(i, MVs) #in ms
    frame1.after(i, MVs)
    #frame1.after(i+100,frame1.destroy)
    #base.after(i, CVs) #in ms
    frame2.after(i, CVs)
    #frame2.after(i+100,frame2.destroy)
    #base.after(i, DVs) #in ms
    frame3.after(i, DVs)
    #frame3.after(i+100,frame3.destroy)

    base.update()#update display

    i=i+3000

base.mainloop()