Temp. Conversation

import tkinter as tk
from functools import partial


# app gui
root = tk.Tk()

tempVal = "Celsius"

# getting dropdown


def store_temp(sel_temp):
    global tempVal
    tempVal = sel_temp

# main conversion


def call_convert(rlabel1, rlabel2, inputn):
    tem = inputn.get()
    if tempVal == 'Celsius':
        f = float((float(tem) * 9 / 5) + 32)
        k = float((float(tem) + 273.15))
        rlabel1.config(text="%.2f Fahrenheit" % f)
        rlabel2.config(text="%.2f Kelvin" % k)
    if tempVal == 'Fahrenheit':
        c = float((float(tem) - 32) * 5 / 9)
        k = c + 273
        rlabel1.config(text="%.2f Celsius" % c)
        rlabel2.config(text="%.2f Kelvin" % k)
    if tempVal == 'Kelvin':
        c = float((float(tem) - 273.15))
        f = float((float(tem) - 273.15) * 1.8000 + 32.00)
        rlabel1.config(text="%.2f Celsius" % c)
        rlabel2.config(text="%.2f Fahrenheit" % f)
    return


# label entry
numberInput = tk.StringVar()
var = tk.StringVar()


input_label = tk.Label(root, text="Enter temperature")
input_entry = tk.Entry(root, textvariable=numberInput)
input_label.grid(row=0, column=0)
input_entry.grid(row=0, column=1)
# dropdown
dropDownList = ["Celsius", "Fahrenheit", " Kalvin"]
dropDown = tk.OptionMenu(root, var, *dropDownList, command=store_temp)
var.set(dropDownList[0])
dropDown.grid(row=0, column=2)


# result

result_label1 = tk.Label(root)
result_label2 = tk.Label(root)
result_label1.grid(row=2, column=1)
result_label2.grid(row=3, column=1)


# button

call_convert = partial(call_convert, result_label1, result_label2, numberInput)
result_button = tk.Button(root, text="Convert", command=call_convert)
result_button.grid(row=1, column=1)


root.mainloop()