如何保存条目小部件中的输入并以* json格式再次加载它们？

如何解决如何保存条目小部件中的输入并以* json格式再次加载它们？

我想保存我当前的输入和程序结果。有人告诉我（。* json）格式作为字典是最好的方法。

这是我的程序的工作方式。输入输入（使用寿命，折扣率，维护程序和维护成本），然后单击“计算”。

我的问题：如何使用文件菜单中的保存按钮来保存输入结果？然后，如何使用打开按钮再次将结果加载到输入中？

这是我的代码：

from tkinter import *
from tkinter import ttk,StringVar,messagebox
import numpy as np


root = Tk()
root.title("Maintenance")
root.geometry('500x300')

#-------------------------- Functions
def iExit():
    qExit = messagebox.askyesno("Quit System","Do you want to quit?")
    if qExit > 0:
        root.destroy()
    return

def Calculate():
    global Lvariable,Pvariable

    if len(var1.get()) == 0 or len(var2.get()) == 0:
        if Lvariable != None and Pvariable != None:
            Lvariable.grid_forget()
            Pvariable.grid_forget()

        Lvariable = LNE
        Lvariable.grid(row=9,column=1,padx=10,columnspan=6,sticky=W)
        Pvariable = btn6
        Pvariable.grid(row=9,column=0,sticky=W,padx=5,ipadx=5)
        Sealer_Maint_Cost.set("")

    elif len(var1.get()) != 0 and len(var2.get()) != 0:
        if Lvariable != None and Pvariable != None:
            Lvariable.grid_forget()
            Pvariable.grid_forget()

        Lvariable = LE
        Lvariable.grid(row=9,sticky=W)
        Pvariable = LE
        Pvariable.grid(row=9,ipadx=5)

        x = var3.get()
        y = var1.get()
        z = float(var4.get())
        a = (float(var2.get())) / 100
        xList = np.arange(int(x),int(y),int(x))
        result = np.array([])
        total_array = np.array([])
        for t in xList:
            total = (0.5 + 0.5 * 0.75 * z) / (1 + a) ** t
            total_array = np.append(total_array,total)
            result = np.cumsum(total_array,dtype=float)
            final = np.sum(result[-1])
            Sealer_Maint_Cost.set('%0.2f' % final)

#------------------------------Menu
menubar = Menu(root)
filemenu = Menu(menubar,tearoff = 0)
menubar.add_cascade(label = "File",menu = filemenu)
filemenu.add_command(label="Save")
filemenu.add_command(label="Open")
root.config(menu = menubar)
#-------------------------- Frames
Tops = Frame(root,width=300,height=200,relief=RAISED,bd=3)
Tops.pack(side=TOP,expand=1,fill="both")

bottom = Frame(root,width=500,height=100,bd=3)
bottom.pack(side=BOTTOM,anchor=S,fill="both")
#-------------------------- Variables
var1 = StringVar()
var2 = StringVar()
var3 = StringVar()
var4 = StringVar()
Sealer_Maint_Cost = StringVar()

#-------------------------------- Tops
space1 = Label(Tops,font=('Times New Roman',13,'bold'),text=" ")
space1.grid(row=0,sticky=W)

lbl1 = Label(Tops,'bold','underline'),text="Sealer Maintenance Cost:")
lbl1.grid(row=1,sticky=W)

space2 = Label(Tops,text=" ")
space2.grid(row=2,sticky=W)

lbl2 = Label(Tops,font=('arial',12),text="Service life (yrs):",bd=5,anchor=W)
lbl2.grid(row=3,sticky=W)
entry1 = Entry(Tops,textvariable=var1,width=10,bg="powder blue",justify='right')
entry1.grid(row=3,sticky=W)

lbl3 = Label(Tops,text="Discount rate (%):",justify='left')
lbl3.grid(row=4,sticky=W)
entry2 = Entry(Tops,textvariable=var2,justify='right')
entry2.grid(row=4,sticky=W)

lbl4 = Label(Tops,text="Maintenance routine (yrs):",anchor=W)
lbl4.grid(row=5,sticky=W)
entry3 = Entry(Tops,textvariable=var3,justify='right')
entry3.grid(row=5,sticky=W)

lbl5 = Label(Tops,text="Maintenance cost ($):",anchor=W)
lbl5.grid(row=6,padx=10)
entry4 = Entry(Tops,textvariable=var4,justify='right')
entry4.grid(row=6,sticky=W)

space3 = Label(Tops,text=" ")
space3.grid(row=7,sticky=W)

lbl6 = Label(Tops,text="Results ($):",anchor=W)
lbl6.grid(row=8,padx=10)
entry5 = Entry(Tops,textvariable=Sealer_Maint_Cost,justify='right')
entry5.grid(row=8,sticky=W)

LNE = Label(Tops,fg="red",text="Please,enter a valid service "
                                                                      "life or a discount rate number")
LE = Label(Tops,1),text=" ")
photo6 = PhotoImage(file='warning.png')
btn6 = Button(Tops,relief=FLAT)
btn6.image = photo6
btn6.config(image=photo6,compound=LEFT)
Lvariable = None
Pvariable = None

#----------------------- Buttons
btnCalculate_Exp = Button(bottom,text="Calculate",12,fg="Steel Blue",borderwidth=2,command=Calculate)
btnCalculate_Exp.grid(row=0,padx=(160,10))


btnExit = Button(bottom,text="Exit",command=iExit)
btnExit.grid(row=0,column=4,ipadx=20)

root.mainloop()

感谢您的帮助，并预先感谢。