Discount App

Here is a simple Discount App made with tkinter. This program will run only in Python 3. To run this program in Python 2, you will need to modify it accordingly.

Code:

	import tkinter as tk
	from tkinter import messagebox
	class myApp:
	def __init__(self):
	self.root = tk.Tk()
	self.e1 = tk.StringVar()
	self.e2 = tk.StringVar()
	self.e3 = tk.StringVar()
	label1 = tk.Label(self.root, text='Price:')
	label2 = tk.Label(self.root, text='Discount:')
	label3 = tk.Label(self.root, text='%')
	label4 = tk.Label(self.root, text='Amount:')
	entry1 = tk.Entry(self.root, textvariable=self.e1)
	entry2 = tk.Entry(self.root, textvariable=self.e2)
	entry3 = tk.Entry(self.root, textvariable=self.e3, state='readonly')
	btn1 = tk.Button(self.root, text='Calculate',command=button_click)
	label1.grid(row=0,column=0,padx=(10,5),pady=(10,5),sticky=tk.W)
	entry1.grid(row=0,column=1,padx=(5,5),pady=(10,5))
	label2.grid(row=1,column=0,padx=(10,5),pady=(5,5),sticky=tk.W)
	entry2.grid(row=1,column=1,padx=(5,5),pady=(5,5))
	label3.grid(row=1,column=2,padx=(5,10),pady=(5,5))
	btn1.grid(row=2,column=1,padx=(5,5),pady=(5,5),sticky=tk.W)
	label4.grid(row=3,column=0,padx=(10,5),pady=(5,10),sticky=tk.W)
	entry3.grid(row=3,column=1,padx=(5,5),pady=(5,10),sticky=tk.W)
	self.root.resizable(False,False)
	self.root.title('Discount App')
	def button_click():
	try:
	price = float(app.e1.get())
	discount = float(app.e2.get())
	except:
	messagebox.showwarning('Invalid Input','Please enter numbers only.')
	else:
	amount = price*(1-discount/100)
	app.e3.set(str(f'{amount:0.2f}'))
	app = myApp()
	app.root.mainloop()

view raw DiscountApp.py hosted with ❤ by GitHub

Output:

To know more about TkInter, please visit tkinter documentation page here.