Introduction to Flask and Blueprints
Flask is a very popular web framework in Python, known for its simplicity and flexibility, which has garnered a lot of attention. One of the key features of Flask that allows developers to create complex applications efficiently is the use of Blueprints. Blueprints let you modularize your code and organize it effectively, making this approach especially useful in larger applications. In version 3.0 of Flask, we encounter new improvements in Blueprints that make using them easier and more efficient.
The role of template_folder in Blueprint
In Flask, it is common to use templates, pages, and web content. In larger applications, organizing and structuring these templates is very important. Blueprints, with their template_folder capability, allow you to store templates related to a specific part of your application in a structured manner. This capability plays a vital role in maintaining better organization and reducing file interdependencies.
How to use template_folder?
To use this capability, you can specify the name of the folder where the templates reside in the Blueprint. This action tells Flask to look for templates in this folder when searching for templates. Using template_folder can lead to better separation of concerns and easier navigation in your application.
Code Example
from flask import Blueprint, render_template
admin_bp = Blueprint('admin', __name__, template_folder='templates/admin')
@admin_bp.route('/dashboard')
def dashboard():
return render_template('dashboard.html')
Line-by-line explanation of the code
from flask import Blueprint, render_template
This line imports blueprint and render_template from Flask, which are used to create a Blueprint and render templates respectively.
admin_bp = Blueprint('admin', __name__, template_folder='templates/admin')
We define a Blueprint named 'admin', and specify 'templates/admin' as the directory where the templates for this Blueprint are stored.
@admin_bp.route('/dashboard')
This is a route definition for the path '/dashboard', which will trigger the execution of the dashboard function when the user navigates to this path.
def dashboard():
This function is defined to handle the code related to displaying the dashboard page.
return render_template('dashboard.html')
This line renders the 'dashboard.html' template and returns the result to the user.