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 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.
Let’s create a GUI based Compound Interest Calculator application :
Below is the implementation :
# 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() |
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Output :
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