Introduction

Flask templates are a fundamental part of creating dynamic web pages. They allow you to render HTML pages with dynamic content, making your web applications more interactive and user-friendly. In this guide, we'll explore Flask templates and how to use them to create dynamic web pages.


Step 1: Setting Up Your Flask Application

Before working with templates, make sure you have a Flask application. If not, you can create a basic Flask app like this:

from flask import Flask, render_template
app = Flask(__name)

Step 2: Creating a Template

Flask uses the Jinja2 template engine, which allows you to create templates with dynamic placeholders. Create a "templates" folder in your project directory and save your template as an HTML file. Here's a sample template, "hello.html":

<!DOCTYPE html>
<html>
<head>
    <title>Hello, Flask!</title>
</head>
<body>
    <h1>Hello, {{ name }}!</h1>
</body>
</html>

The double curly braces {{ name }} indicate a dynamic placeholder that Flask will fill with data when rendering the template.


Step 3: Rendering a Template

In your Flask application, you can use the render_template function to render your HTML template. Pass data as keyword arguments to the function. Here's an example:

@app.route('/')
def hello():
    user_name = "Flask"
    return render_template('hello.html', name=user_name)

Here, we pass the "user_name" variable to the template as "name." When you visit the route, the template will display "Hello, Flask!" based on the data provided.


Conclusion

Flask templates are a powerful tool for creating dynamic web pages. You can build interactive and data-driven web applications by combining templates with Flask's routing and views. Continue to explore Flask's capabilities to take your web development to the next level.