python: weight conversion gui with tkinter

 # Python program to create a simple GUI

# weight converter using Tkinter

from tkinter import *

# Create a GUI window

window = Tk()

# Function to convert weight

# given in kg to grams, pounds

# and ounces

def from_kg():

# convert kg to gram

gram = float(e2_value.get())*1000

# convert kg to pound

pound = float(e2_value.get())*2.20462

# convert kg to ounce

ounce = float(e2_value.get())*35.274

# Enters the converted weight to

# the text widget

t1.delete("1.0", END)

t1.insert(END,gram)

t2.delete("1.0", END)

t2.insert(END,pound)

t3.delete("1.0", END)

t3.insert(END,ounce)

# Create the Label widgets

e1 = Label(window, text = "Enter the weight in Kg")

e2_value = StringVar()

e2 = Entry(window, textvariable = e2_value)

e3 = Label(window, text = 'Gram')

e4 = Label(window, text = 'Pounds')

e5 = Label(window, text = 'Ounce')

# Create the Text Widgets

t1 = Text(window, height = 1, width = 20)

t2 = Text(window, height = 1, width = 20)

t3 = Text(window, height = 1, width = 20)

# Create the Button Widget

b1 = Button(window, text = "Convert", command = from_kg)

# grid method is used for placing

# the widgets at respective positions

# in table like structure

e1.grid(row = 0, column = 0)

e2.grid(row = 0, column = 1)

e3.grid(row = 1, column = 0)

e4.grid(row = 1, column = 1)

e5.grid(row = 1, column = 2)

t1.grid(row = 2, column = 0)

t2.grid(row = 2, column = 1)

t3.grid(row = 2, column = 2)

b1.grid(row = 0, column = 2)

# Start the GUI

window.mainloop()