如何删除画布、分隔符和滚动条？

Question

1. 我使用pythontkinter进行设计目的。在我的用户界面，我有一个 画布、分隔符和滚动条。更新时，新画布 附加到上一个。你能告诉我怎么把 上一个画布、分隔符和滚动条？在

   我试了separator.destroy()，canvas.delete('all')， self.canvas.delete('all')、self.canvas.update_idletasks()等。

2. 代码：

       from tkinter import *
       import matplotlib
       import pandas as pd
       from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
       import matplotlib.pyplot as plt
       from wordcloud import WordCloud
       from matplotlib.figure import Figure
   
       master = Tk()
       separator3 = Frame(height=618,width=180, bd=4, bg='dodgerblue')
       separator6 = Frame(height=250,width=240, bd=4, bg='dodgerblue')
       separator1 = Frame(height=100,width=100, bd=1,bg='dodgerblue')
   
       def get():
         Disp_pos =10
         Disp_neg =-12
         w = Scale(separator6, from_=10, to=0,orient=VERTICAL)
         w.set(Disp_pos)
         w.pack(anchor=CENTER,side=TOP,ipady=10,ipadx=10)
   
         Label1 = Label(separator6, text="")
         Label1.pack(anchor=CENTER, side=TOP)
         f3 = Figure(figsize=(2, 3), dpi=100)
         canvas2 = FigureCanvasTkAgg(f3, master=separator3)
         Label1 = Label(separator3,text="  WORD  CLOUD ")
         Label1.pack(anchor=CENTER, side=TOP)
         ax3 = f3.add_subplot(111)
         text = 'sample'
         print(type(text))
         ax3.set_wordcloud = WordCloud().generate(text)
         ax3.imshow(ax3.set_wordcloud, interpolation='bilinear')
         ax3.axis("off")
         canvas2.show()
         canvas2.get_tk_widget().pack( side=BOTTOM,fill=BOTH, expand=1)
         canvas2.draw()
         separator2 = Frame(height=150, width=280, bd=4, bg='dodgerblue')
         scrollbar = Scrollbar(separator2)
         scrollbar.pack(side=RIGHT, ipady=270, fill=Y)
         Label1 = Label(separator2, text=" TEXT ",font=('Times', 12))
         Label1.pack(anchor=CENTER, side=TOP)
         i = 'sample sample sample'
         Re=Listbox(separator2,yscrollcommand=scrollbar.set)                      
         Re.insert(END, i)
         Re.pack()
         scrollbar.config(command=Re.yview)
         separator2.pack(side=TOP, padx=10, pady=10, fill=BOTH)
   
       Button1 = Button(separator1, text='  GET  ', font=('Times', 
                        15,'bold'),command=get,  bg="wheat2",relief=RAISED)
       Button1.pack(anchor=CENTER,pady=5)
       separator1.pack(fill=BOTH,side=LEFT, padx=5, pady=5)
       separator6.pack(fill=BOTH,side=RIGHT, padx=5, pady=5)
       separator3.pack(side=BOTTOM,fill=BOTH,padx=5, pady=5)
       master.config(bg='white')
       master.title('sample')
       mainloop()
   

Answer 1

要清除框架的内容，其思想是销毁其所有子对象。框架的所有子级都存储在dictionary frame.children（格式为{name:widget}）

children = list(frame.children.values())
for child in children:
    child.destroy()

{&；可以在cd2>的开头使用分隔符。separator2只在get()内本地定义，这与其他帧的定义不一致，意味着每次运行{}时都会创建一个新的{}。所以我把它移到函数之外，用其他的框架。在

以下是修改后的代码：

^{pr2}$