Hello everybody, Welcome back to programminginpython.com! Now am going to show you how to make a simple Python GUI application, basically, the app is a simple calculator which adds two numbers. I used TKInter which is a standard GUI package for Python. In theprevious post, I covered the basic introduction to GUI programming in Python, here I will use those and also extend some other things to build this simple app. So get ready for a simple python GUI calculator using TKInter.
You can also watch the video on YouTubehere
Below are the screenshots, how what our basic app looks like,
Here I used, a grid layout for designing the layout, in theprevious post, I told about pack() which sets the widgets automatically based on available space in the window, but here we can set the widgets where we want to place them.
Firstly import and initialize TKInter,
import tkinter as tk....root = tk.Tk()
I also set the size of the app and its title,
root.geometry('400x200+100+200')root.title('Simple Calculator')I also added some labels and input fields to read the entered numbers,
labelTitle = tk.Label(root, text="Simple Calculator").grid(row=0, column=2)labelNum1 = tk.Label(root, text="Enter a number").grid(row=1, column=0)labelNum2 = tk.Label(root, text="Enter another number").grid(row=2, column=0)labelResult = tk.Label(root)labelResult.grid(row=7, column=2)entryNum1 = tk.Entry(root,textvariable=number1).grid(row=1, column=2)entryNum2 = tk.Entry(root,textvariable=number2).grid(row=2, column=2)
Then I add a button, when clicked, calculates the result and displays it in the labellabelResult I initialized the above.
So when the button is clicked, a function is called which calculates the sum of both the numbers.
call_result = partial(call_result, labelResult, number1, number2) buttonCal = tk.Button(root, text="Calculate", command=call_result).grid(row=3, column=0)
Thecommand parameter toButton function calls thecall_resultfunction, which does the simple logic.
Thecall_result function.
def call_result(label_result, n1, n2): num1 = (n1.get()) num2 = (n2.get()) result = int(num1)+int(num2) label_result.config(text="Result is %d" % result) return
Feel free to look at my previous posts onPython GUI programming.
Program
__author__ = 'Avinash'import tkinter as tkfrom functools import partialdef call_result(label_result, n1, n2): num1 = (n1.get()) num2 = (n2.get()) result = int(num1)+int(num2) label_result.config(text="Result is %d" % result) returnroot = tk.Tk()root.geometry('400x200+100+200')root.title('Simple Calculator')number1 = tk.StringVar()number2 = tk.StringVar()labelTitle = tk.Label(root, text="Simple Calculator").grid(row=0, column=2)labelNum1 = tk.Label(root, text="Enter a number").grid(row=1, column=0)labelNum2 = tk.Label(root, text="Enter another number").grid(row=2, column=0)labelResult = tk.Label(root)labelResult.grid(row=7, column=2)entryNum1 = tk.Entry(root, textvariable=number1).grid(row=1, column=2)entryNum2 = tk.Entry(root, textvariable=number2).grid(row=2, column=2)call_result = partial(call_result, labelResult, number1, number2)buttonCal = tk.Button(root, text="Calculate", command=call_result).grid(row=3, column=0)root.mainloop()That’s it for this post guys, also feel free to look at other Python tutorials onGUI Programming.
