PYTHON TKINTER CALCULATOR.

In this a simple GUI(graphical user interface) calculator built with Python and Tkinter. It is developed as a learning project to explore Object-Oriented Programming (OOP).It performs basic arithmetic operations such as addition, subtraction, multiplication, and division. The user can input expressions and see the results displayed on the screen.

Objectives

Learn the basics of python programming Build a simple working application Use AI tools to guide through development Document the learning process for beginners

Features

GUI interface: Built using Tkinter library, a python built-in library Basic operations: addition, subtraction, multiplication, division, percentage OOP Architecture: Logic encapsulated within a Calculator class for better state management Clear button: To reset display Handles decimals and chained operations Error handling for invalid expressions

Technology summary

What is python?

Python is a high-level, interpreted, general-purpose programming language known for its simple readable syntax that emphasizes code clarity. It supports object-oriented, structured, and functional programming, making it highly versatile for web development, data science, AI, and automation.

What is tkinter?

Tkinter is the standard Python library for creating graphical user interfaces. It provides an object-oriented interface to the cross-platform Tk GUI toolkit, and is included with most standard Python installations, making it easily accessible for beginners without requiring additional setup. It lets you create windows, buttons, labels, input fields and layout containers to build desktop applications Real-world-use: Simple data entry forms,

System requirements

Os: Windows, macOS, Linux Python: Python 3.7 or higher tkinter: built-in python library Editor: VS code

Setup and Installation

1. Verify python is installed:

   • Open terminal and run: python --version
   • If not installed, download it from: https://www.python.org/downloads/
     • For windows:
       • Check the box that says Add python.exe to PATH. This allows you to run Python from any command prompt window.
       • Select Install Now, which includes essential features like pip (package manager) and IDLE (integrated development environment).
     • For macOS:
       • The installer places the Python executable and libraries in the /Library/Frameworks/Python.framework directory.
       • You can also use the Homebrew package manager for installation by running brew install python in the terminal.
     • For linux:
       • Python is usually pre-installed, but you may need to update to a newer version using your system's package manager(e.g., sudo apt install python3 on Ubuntu/Debian).

2. Verify tkinter is available:

   • Run: python -m tkinter

3. Download the project:

   • Option A - clone with git git clone https://github.com/KiokoB/python-calculator-project/ cd python-calculator-project
   • Option B - download the zip file from github, extract it and open the folder

4. Run the program: python calculator.py

   • The calculator window will open immediately, no additional dependencies are required

Python structure

python-calculator-project |__calculator.py - main application file |__README.md

How it works

A user inputs numbers and an operator, the calculator performs the operation and displays the results

Common issues and fixes

1. python: command not found
   • Means python is not installed. Download it from python.org
2. Display shows error
   • Majorly due to entry of invalid expressions. Use the "C" to clear and re-enter.