Home > Article > Backend Development > Python Flask framework building blog tutorial

Python Flask framework building blog tutorial

王林Original: 2023-06-17 15:06:122037browse

Python Flask framework is a lightweight web application framework suitable for small to medium-sized web applications. This article will introduce how to use the Flask framework to build a simple blog application.

Prerequisites

Before you begin, you need to know the following:

Python programming language
Python virtual environment (virtualenv)
Flask Framework

If you are not familiar with the above knowledge, please study the relevant tutorials first.

Step 1: Create a virtual environment

First, we need to create a virtual environment to ensure that our application will not be affected by the local Python environment.

Open a terminal and run the following command:

virtualenv venv

This will create a virtual environment directory named "venv".

Now, we need to activate the virtual environment. Run the following command:

source venv/bin/activate

If you are prompted to install virtualenv, please use the following command to install it:

pip install virtualenv

Step 2: Install Flask

In the virtual environment, run the following command Let’s install Flask:

pip install Flask

Now that we have the Flask framework installed, we can start creating our blogging application.

Step 3: Create a Flask application

Create a new folder in the virtual environment and create the Python file "app.py" in it.

Add the following code to the file:

from flask import Flask

app = Flask(__name__)

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

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

This is a minimal Flask application with the root route returning a simple "Hello, World!" message for testing our application Whether the program is working properly.

Step 4: Run the application

Run the application using the following command:

export FLASK_APP=app
flask run

The Flask application is now running and can be opened in the browser at http://localhost :5000/, see the "Hello, World!" message.

Step 5: Create a blog

Now we will create a simple blog. Add the following code to the app.py file:

from flask import Flask, render_template

app = Flask(__name__)

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

@app.route('/blog')
def blog():
    posts = [
        {'title': 'First Post', 'content': 'This is my first post.'},
        {'title': 'Second Post', 'content': 'This is my second post.'}
    ]
    return render_template('blog.html', posts=posts)

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

In this new route, we create a list called "posts" that contains our blog posts.

We also used the render_template function to link this function with the blog.html file.

Step 6: Create Template

Now we need to create a template to display our blog posts. Create a folder called "templates" in the root directory of your application and a file called "blog.html" inside it.

Add the following code in blog.html:

<!DOCTYPE html>
<html>
<head>
    <title>Blog</title>
</head>
<body>
    {% for post in posts %}
        <h2>{{ post.title }}</h2>
        <p>{{ post.content }}</p>
    {% endfor %}
</body>
</html>

In this template, we use a for loop to iterate over the "posts" list and display the title and content of each blog post.

Step 7: Run the application

Run the application again using the following command:

export FLASK_APP=app
flask run

Now you can open http://localhost:5000/blog in your browser, See our blog post already shown.

Summary

In this article, we learned how to use Python’s Flask framework to build a simple blogging application. We cover Python virtual environments, installing the Flask framework, and creating Flask applications, routing, templates, and more. This is just a simple example, but you can extend this sample application into a more complex application.

The above is the detailed content of Python Flask framework building blog tutorial. For more information, please follow other related articles on the PHP Chinese website!

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：Flask-RESTful-Swagger: Documented best practices for building RESTful APIs in PythonNext article：Flask-RESTful-Swagger: Documented best practices for building RESTful APIs in Python

See more

Python Flask framework building blog tutorial

Related articles