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 tkinterfrom tkinter import *# Function for clearing the # contents of all entry boxes def clear_all() : # whole content of entry boxes is deleted principal_field.delete(0, END) rate_field.delete(0, END) time_field.delete(0, END) compound_field.delete(0, END) # set focus on the principal_field entry box principal_field.focus_set() # Function to find compound interest def calculate_ci(): # get a content from entry box principal = int(principal_field.get()) rate = float(rate_field.get()) time = int(time_field.get()) # Calculates compound interest CI = principal * (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 Principal Amount : label label1 = Label(root, text = "Principal 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 padding along x-axis . # pady keyword argument used to set padding 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. principal_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 padding along x-axis . # pady keyword argument used to set padding along y-axis . principal_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 :
