How to write your first online programme in Python
- 1. How to Write an Online Application in Python A Beginner's Guide to Building Web Applications
- 2. Introduction to Online Applications • Online applications are web-based tools accessible through a browser. • Python, with frameworks like Flask and Django, makes creating these applications straightforward.
- 3. Step 1: Install Necessary Tools • 1. Install Python from the official website (python.org). • 2. Use pip to install required packages: Flask or Django. • Example: pip install flask • 3. Set up a code editor like VS Code or PyCharm.
- 4. Step 2: Set Up the Project • 1. Create a new project directory. • 2. Inside the directory, create a virtual environment: • python -m venv venv • 3. Activate the virtual environment and install dependencies.
- 5. Step 3: Write the Application Code • 1. Create a file (e.g., app.py). • 2. Import the required modules: • from flask import Flask • 3. Initialize Flask and define routes: • app = Flask(__name__) • @app.route('/') • def home(): • return 'Hello, World!'
- 6. Step 4: Run and Test the Application • 1. Run the application with the command: • python app.py • 2. Access the application in your browser at: • http://127.0.0.1:5000 • 3. Test your application to ensure it works as expected.
- 7. Step 5: Deploy the Application • 1. Choose a hosting platform like Heroku or AWS. • 2. Prepare your application for deployment by adding required files like requirements.txt. • 3. Follow the platform-specific steps to deploy your application online.