Building Calculator using PyQt6 in Python

In this article we will see how we can create a calculator using PyQt6.
A calculator is something used for making mathematical calculations, in particular a small electronic device with a keyboard and a visual display. Below is the how the calculator will looks like

GUI implementation steps 

• Create a label to show the numbers and the output and set its geometry 
• Align the label text fro right side and increase the font size of it 
• Create push buttons for the numbers from 0 to 9 and set their geometry in the proper order 
• Create operator push button example for addition, subtraction etc 

Back end implementation steps

• Add action to each button 
• Inside the actions of each button except the equals to action, append the text of the label with the respective number or the operator 
• Inside the equals to action get the text of the label and start the try except block 
• Inside the try block use eval method on the label text to get the ans and set the answer to the label 
• Inside the except block set “ERROR” as text 
• For delete action make the last character removed from the label and for the clear action set the whole text to blank.

Here, you can download the code sources.