This content originally appeared on DEV Community and was authored by Ingeborg Adolfs
Flask is a lightweight yet powerful web framework for Python that makes building web applications simple. Whether you're developing a small project or a more complex application, Flask provides the flexibility needed for both beginners and experienced developers.
A Brief History:
Flask was created by Armin Ronacher in 2010. It was originally meant as an April Fool's joke, but it became so surprisingly popular that it is now one of Python's most popuar web framworks.
Why Choose Flask?
Flask is lightweight and minimalistic; it doesn’t impose a rigid structure, allowing developers to build applications with more freedom.
Flask's intent was to be minimalistic and simple. Using extensions allows a developer to really custoize their program.
Flask's simplicity also makes it easy to learn with a small learning curve to get your first project started. Flask is a great choice for beginners entering web development.
Developers can also add libraries and extensions as needed, making it highly customizable.
Setting Up Flask:
To get started, install Flask using pip:
pip install flask
Creating a Simple Flask Application
Let’s create a basic web app that returns “Hello, World!” when accessed.
from flask import Flask
app = Flask(__name__)
@app.route('/')
def home():
return "Hello, World!"
if __name__ == '__main__':
app.run(debug=True)
Save this as app.py and run it using:
python app.py
This starts a local web server, and visiting http://127.0.0.1:5000/, or Localhost with the given port number, will display “Hello, World!”.
That's it! A very simple Flask application. Of course, there are plenty of ways to make it much more complex, but the barrier to entry is quite low.
Flask allows you to handle dynamic routes, integrate databases, and use templates for rendering HTML pages. Here’s an example of handling dynamic URLs:
@app.get('/user/<name>')
def user(name):
return f"Hello, {name}!"
Conclusion
Flask is an excellent choice for developers who want a simple yet flexible framework for web development. Its ease of use and extensive community support make it a go-to solution for projects of all sizes. Flask is also great for beginners as it is quite easy to learn the basics. Give it a try, you never know where a little joke might take you!
This content originally appeared on DEV Community and was authored by Ingeborg Adolfs
Ingeborg Adolfs | Sciencx (2025-02-13T17:18:55+00:00) Flask Applications. Retrieved from https://www.scien.cx/2025/02/13/flask-applications/
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