Python venv flask

Python venv flask is a combination of tools and technologies used in building web applications using Flask in a virtual environment created using python venv. Flask is a Micro web framework written in Python, which is generally used for small to medium scale web applications. The virtual environment created using python venv helps isolate the application environment from the system environment, which makes it easier to manage dependencies and run the application on different devices.

Setting up the virtual environment

To create a virtual environment using python venv, first, make sure python venv is installed:

python3 -m venv env

This will create a virtual environment called 'env'. Before installing flask and other packages, activate the virtual environment using:

source env/bin/activate

Installing Flask

To install Flask within the isolated environment, run the following command:

pip install Flask

Creating a simple Flask application

To create a basic Flask application, create a new file called app.py and add the following code:

from flask import Flask

app = Flask(__name__)

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

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

The app can be run by executing the following command:

python app.py

Conclusion

Python venv flask is an amazing combination of tools for creating web applications. Flask is a robust micro web framework that can be used for various types of web applications, and Python venv helps isolate the application environment from the system environment. Combining these two technologies makes it easier to manage dependencies and run your Flask application in different environments with ease.