unable to close the tkinter after using destroy() - python-3.x

Question

Using tkinter window to get some user parameter and stored in dictionary, after the "SAVE" button pressed. But the tkinter is not closing in console..
How to close the tkinter after receiving the data...
import tkinter as tk
riskparams = {}
This is the simplified function with reproduce the issue here
def setriskmgmtparams():
risk = tk.Tk()
risk.title("Risk Management System")
w = 650
h = 450
ws = risk.winfo_screenwidth()
hs = risk.winfo_screenheight()
x = ws - w
y = hs - h
risk.geometry('%dx%d+%d+%d' % (w, h, x, y))
def savedata(*event):
global riskparams
riskparams['MaxQty'] = int(MQ_box.get())
#Setting Price % Range, if any not correct reset to defaults 7%
riskparams['PriceLowRange'] = float(pricerange1.get())/100
riskparams['PriceHighRange'] = float(pricerange2.get())/100
riskparams['MaxOrderVal'] = int(maxorderval.get())
riskparams['Norderpsec'] = int(norderval.get())
riskparams['MaxTurnover'] = int(maxturnover.get())
risk.destroy()
print(" TTAPI | RMS checks has been set ")
return
rows = 0
while rows < 11:
risk.rowconfigure(rows, weight=1)
risk.columnconfigure(rows, weight=1)
rows +=1
orderlevel = tk.Label(risk, text="RMS CHECKS PARAMS by API")
orderlevel.grid(row=0, column=1, sticky='NESW')
MaxQuantity = tk.Label(risk, text="Max Quantity per order:")
MaxQuantity.grid(row=1, column=1, sticky='E')
mqvar = tk.StringVar(risk, value='100000')
MQ_box = tk.Entry(risk, textvariable=mqvar)
MQ_box.bind("<Return>", savedata)
MQ_box.grid(row=1, column=2, sticky='W')
#price range
price1 = tk.Label(risk, text="Price Range % LOW:")
price1.grid(row=2, column=1, sticky='E')
pricevar1 = tk.StringVar(risk, value='-10')
pricerange1 = tk.Entry(risk, textvariable=pricevar1)
pricerange1.bind('<Return>', savedata)
pricerange1.grid(row=2, column=2, sticky='W')
price2 = tk.Label(risk, text="Price Range % HIGH:")
price2.grid(row=3, column=1, sticky='E')
pricevar2 = tk.StringVar(risk, value='10')
pricerange2 = tk.Entry(risk, textvariable=pricevar2)
pricerange2.bind('<Return>', savedata)
pricerange2.grid(row=3, column=2, sticky='W')
ordval = tk.Label(risk, text="Max Order Value per order :")
ordval.grid(row=4, column=1, sticky='E')
mxordval = tk.StringVar(risk, value='2000000')
maxorderval = tk.Entry(risk, textvariable=mxordval)
maxorderval.bind('<Return>', savedata)
maxorderval.grid(row=4, column=2, sticky='W')
norders = tk.Label(risk, text="No Orders allowed per Second/Client :")
norders.grid(row=5, column=1, sticky='E')
nordval = tk.StringVar(risk, value='2')
norderval = tk.Entry(risk, textvariable=nordval)
norderval.bind('<Return>', savedata)
norderval.grid(row=5, column=2, sticky='W')
maxturn = tk.Label(risk, text="Max TurnOver per day/Client :")
maxturn.grid(row=6, column=1, sticky='E')
maxturnval = tk.StringVar(risk, value='10000000')
maxturnover = tk.Entry(risk, textvariable=maxturnval)
maxturnover.bind('<Return>', savedata)
maxturnover.grid(row=6, column=2, sticky='W')
savebtn = tk.Button(risk,
text='SAVE',
bg = "yellow",
command=savedata)
savebtn.bind('<Return>', savedata)
savebtn.grid(row=8, column=2, sticky='NESW')
#Run the app
risk.mainloop()
Calling the function
But the tkinter window closes and loop not closed, how to close the loop
setriskmgmtparams()