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Flask is a web framework that allows developers to build lightweight web applications quickly and easily with Flask Libraries. It’s a Python module that lets you develop web applications easily. It has a small and easy-to-extend core: it’s a microframework that doesn’t include an ORM (Object Relational Manager) or such features. It does have many cool features like url routing, template engine. It is a WSGI web app framework.
It offers a plethora of features to developers looking forward to building complex web or mobile applications. With the help of Flask, you can build blogging platforms, content sites, and many more complex applications.
To start the flask application, we use the run() function:
app.run()
The above code is used to start the function, but while working on a code and making changes, the server must be reloaded on its own. But, the server does not reload on its own but manually. To avoid such minor inconvenience, we use the debug property.
Using the debug property, the server reloads on its own at every code change and will also help in tracking errors.
The debug property is added as follows:
app.debug = True
app.run()
app.run(debug = True)
Routing:
Another primary reason to use Flask is for its routing property.
For the users to not confuse with the URLs, web frameworks provide routing techniques helping the user remember the URLs.
Navigating directly to a web page without leaving the Home page by using routing is possible.
This is achieved by the route() decorator that binds the URL to a function:
@app.route('/hello')
def hello_world():
return 'hello world'
The hello-world() function is connected to the URL ‘/hello’ rule. As a result, when a visitor hits http://localhost:5000/hello, the browser will display the output of the hello world() function.
You may use it to construct complicated and straightforward web applications and applications that are integrated with machine learning algorithms. Developers can make use of their lightweight framework to:
Integrated support for unit testing
Support for secure cookies
Create APIs easily
Supports Visual Debugging
Can be integrated efficiently with all the major databases integrate easily with complex databases
Use Ninja Templating Engine
