python venv flask

1. Create a virtual environment:

python -m venv venv

1. Activate the virtual environment:

2. On Windows:

bash venv\Scripts\activate

• On macOS and Linux:

bash source venv/bin/activate

1. Install Flask within the virtual environment:

pip install Flask

1. Create a Flask application file, e.g., app.py.

2. Open the app.py file and define a Flask application:

from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run(debug=True)

1. Save the file.

2. Run the Flask application:

python app.py

1. Open a web browser and go to http://127.0.0.1:5000/ to see the "Hello, World!" message.

2. To stop the Flask application, press Ctrl+C in the terminal where it's running.

3. Deactivate the virtual environment:

deactivate