why am I getting this TypeError: () got an unexpected keyword argument error?

I was trying to add tkinter graphics to a small part of my code for some reason and want the output(calculated sum) on window.How did I make this code working please help!

my code:

import tkinter as tk
from tkinter import *

window = tk.Tk()
window.geometry('400x600')
window.resizable(0, 0)
window.title("HACKER-simple interest setup")

# define entry variables
n1 = StringVar()
n2 = StringVar()
n3 = StringVar()


def simple_interest(*x):
    global principal, time
    principal = float(principal.get())
    time = float(time.get())
    interest_rate = float(ir.get())

    # simple interest calculating engine
    simple_interest(Simple_Interest=principal * (interest_rate / 100) * time)

    Output = Text(window, width=25, bg="light cyan")
    Output.grid(column=0, row=4)
    Output.place(x=150, y=300)
    Output.insert(END, "Simple_Interest:", simple_interest)


lbl = Label(window, text="Principal:", font=("Aerial Bold Italic", 15))
lbl.grid(column=0, row=4)
lbl.place(x=45, y=125)

lbl = Label(window, text="Time:", font=("Aerial Bold Italic", 15))
lbl.grid(column=0, row=4)
lbl.place(x=70, y=150)

lbl = Label(window, text="Interest rate:", font=("Aerial Bold Italic", 15))
lbl.grid(column=0, row=4)
lbl.place(x=12, y=170)

principal = tk.Entry(window, textvariable=n1, width=40)
principal.grid(column=0, row=4)
principal.place(x=130, y=130)

time = tk.Entry(window, textvariable=n2, width=40)
time.grid(column=0, row=4)
time.place(x=130, y=150)

ir = tk.Entry(window, textvariable=n3, width=40)
ir.grid(column=0, row=4)
ir.place(x=130, y=170)

btn = Button(window, text="Calculate", bg="red", fg="white", command=simple_interest)
btn.grid(column=0, row=5)
btn.place(x=220, y=200)

window.mainloop()

getting error:

C:UsersAnmolAppDataLocalProgramsPythonPython38python.exe "D:/Downloads/si test.py"
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:UsersAnmolAppDataLocalProgramsPythonPython38libtkinter__init__.py", line 1892, in __call__
    return self.func(*args)
  File "D:/Downloads/si test.py", line 22, in simple_interest
    simple_interest(Simple_Interest=principal * (interest_rate / 100) * time)
TypeError: simple_interest() got an unexpected keyword argument 'Simple_Interest'

Answer

I think you can use Simple_Interest=principal * (interest_rate / 100) * time at line 22.
And you should use the “if” statement in line 17-19

import tkinter as tk
from tkinter import *

window = tk.Tk()
window.geometry('400x600')
window.resizable(0, 0)
window.title("HACKER-simple interest setup")

# define entry variables
n1 = StringVar()
n2 = StringVar()
n3 = StringVar()


def simple_interest(*x):
    global principal, time
    principal = float(principal.get() if not isinstance(principal,float) else principal)
    time = float(time.get()) if not isinstance(time,float) else time
    interest_rate = float(ir.get()) if not isinstance(ir,float) else ir

    # simple interest calculating engine
    Simple_Interest=principal * (interest_rate / 100) * time

    Output = Text(window, width=25, bg="light cyan")
    Output.grid(column=0, row=4)
    Output.place(x=150, y=300)
    Output.insert(END, "Simple_Interest:n"+str(Simple_Interest))


lbl = Label(window, text="Principal:", font=("Aerial Bold Italic", 15))
lbl.grid(column=0, row=4)
lbl.place(x=45, y=125)

lbl = Label(window, text="Time:", font=("Aerial Bold Italic", 15))
lbl.grid(column=0, row=4)
lbl.place(x=70, y=150)

lbl = Label(window, text="Interest rate:", font=("Aerial Bold Italic", 15))
lbl.grid(column=0, row=4)
lbl.place(x=12, y=170)

principal = tk.Entry(window, textvariable=n1, width=40)
principal.grid(column=0, row=4)
principal.place(x=130, y=130)

time = tk.Entry(window, textvariable=n2, width=40)
time.grid(column=0, row=4)
time.place(x=130, y=150)

ir = tk.Entry(window, textvariable=n3, width=40)
ir.grid(column=0, row=4)
ir.place(x=130, y=170)

btn = Button(window, text="Calculate", bg="red", fg="white", command=simple_interest)
btn.grid(column=0, row=5)
btn.place(x=220, y=200)

window.mainloop()

It was worked!