Prerequisites : Introduction to tkinter | Program to calculate compound interest
Python offers multiple options for developing a GUI (Graphical User Interface). Out of all the GUI methods, Tkinter is the most commonly used method. In this article, we will learn how to create a Compound Interest GUI Calculator application using Tkinter, with a step-by-step guide.
To create a Tkinter:
- Importing the module – tkinter
- Create the main window (container)
- Add any number of widgets to the main window.
- Apply the event Trigger on the widgets.
Below is what the GUI will look like:
Let’s create a GUI based Compound Interest Calculator application.
Below is the implementation :
Python3
# import all classes / functions from the tkinter from tkinter import * # Function for clearing the # contents of all entry boxes def clear_all() : # whole content of entry boxes is deleted principle_field.delete( 0 , END) rate_field.delete( 0 , END) time_field.delete( 0 , END) compound_field.delete( 0 , END) # set focus on the principle_field entry box principle_field.focus_set() # Function to find compound interest def calculate_ci(): # get a content from entry box principle = int (principle_field.get()) rate = float (rate_field.get()) time = int (time_field.get()) # Calculates compound interest CI = principle * ( pow (( 1 + rate / 100 ), time)) # insert method inserting the # value in the text entry box. compound_field.insert( 10 , CI) # Driver code if __name__ = = "__main__" : # Create a GUI window root = Tk() # Set the background colour of GUI window root.configure(background = 'light green' ) # Set the configuration of GUI window root.geometry( "400x250" ) # set the name of tkinter GUI window root.title( "Compound Interest Calculator" ) # Create a Principle Amount : label label1 = Label(root, text = "Principle Amount(Rs) : " , fg = 'black' , bg = 'red' ) # Create a Rate : label label2 = Label(root, text = "Rate(%) : " , fg = 'black' , bg = 'red' ) # Create a Time : label label3 = Label(root, text = "Time(years) : " , fg = 'black' , bg = 'red' ) # Create a Compound Interest : label label4 = Label(root, text = "Compound Interest : " , fg = 'black' , bg = 'red' ) # grid method is used for placing # the widgets at respective positions # in table like structure . # padx keyword argument used to set paading along x-axis . # pady keyword argument used to set paading along y-axis . label1.grid(row = 1 , column = 0 , padx = 10 , pady = 10 ) label2.grid(row = 2 , column = 0 , padx = 10 , pady = 10 ) label3.grid(row = 3 , column = 0 , padx = 10 , pady = 10 ) label4.grid(row = 5 , column = 0 , padx = 10 , pady = 10 ) # Create a entry box # for filling or typing the information. principle_field = Entry(root) rate_field = Entry(root) time_field = Entry(root) compound_field = Entry(root) # grid method is used for placing # the widgets at respective positions # in table like structure . # padx keyword argument used to set paading along x-axis . # pady keyword argument used to set paading along y-axis . principle_field.grid(row = 1 , column = 1 , padx = 10 , pady = 10 ) rate_field.grid(row = 2 , column = 1 , padx = 10 , pady = 10 ) time_field.grid(row = 3 , column = 1 , padx = 10 , pady = 10 ) compound_field.grid(row = 5 , column = 1 , padx = 10 , pady = 10 ) # Create a Submit Button and attached # to calculate_ci function button1 = Button(root, text = "Submit" , bg = "red" , fg = "black" , command = calculate_ci) # Create a Clear Button and attached # to clear_all function button2 = Button(root, text = "Clear" , bg = "red" , fg = "black" , command = clear_all) button1.grid(row = 4 , column = 1 , pady = 10 ) button2.grid(row = 6 , column = 1 , pady = 10 ) # Start the GUI root.mainloop() |
Output :
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