Python and Django development: from entry to mastery

Python and Django Development: From Getting Started to Mastery

Python and Django are one of the most popular programming languages ​​and web frameworks currently. The Python language has a simple design, is easy to read and write, and is suitable for many fields. It has become the language of choice in artificial intelligence, data analysis, web development and other fields. The Django framework is an open source framework that helps developers build web applications efficiently. In this article, we will start with the basics of Python and getting started with Django, and gradually go deeper, leading readers to gradually master the development technology of Python and Django.

1. Python Basics

Python is a high-level programming language designed to be simple and clear. Python syntax is very simple and clear to write, and is often used for introductory learning of programs. The most commonly used application scenarios of Python include web development, scientific computing, data analysis, machine learning, and web crawling. In the process of learning Python, we need to master the following aspects of knowledge:

1.1 Basic Python syntax

Python code files usually end with .py, and you can use a text editor to write Python code. You can use the print function to print out information and the input function to obtain user input. Python also has basic syntax such as comments, variables, assignments, data types, operators, branch statements, and loop statements.

1.2 Python function

A function in Python is a block of code that can be used repeatedly. To define a function in Python, you can use the def keyword to define the function name, input parameter list, function body, and return value (optional).

1.3 Python modules and packages

A module in Python is a reusable block of code. You can use the import keyword to import the module to use its functions, methods and variables. Modules can be built-in modules or third-party modules. If multiple modules are combined together, they form a package. A package is a folder containing multiple modules, which must have an __init__.py file.

2. Getting started with Django

Django is an advanced web framework written in Python that can quickly build high-quality web applications. Django was originally developed for the news site The World Company to quickly build diverse web applications. Django is based on the MVC model, which mainly includes three parts: model, view and template. In the process of learning Django, we need to master the following aspects of knowledge:

2.1 Django basics

Django applications can be divided into multiple applications, all of which are located in Django projects. Every application contains parts such as views, templates, models, URL mappings, etc. Django has a powerful ORM framework that can easily store data in the database.

2.2 Django views and templates

Django views are functions or methods that handle HTTP requests and map HTTP requests to specific URLs in the application. A Django template is a file containing HTML, CSS, and JavaScript code that can be used to generate content that is displayed in a web page.

2.3 Django forms and user authentication

Django provides form functions for processing form data. Django also provides a user authentication system to control which users have what permissions to web applications.

3. Python and Django project practice

After completing the basic learning of Python and Django, we need to practice some practical projects to improve our programming skills. The following are 3 examples of Python and Django projects:

3.1 Douban Movie Crawler

Use Python to write a crawler to crawl Douban Movie data and store it locally or in a database.

3.2 Online voting system

Use Django to build an online voting system, and use Django templates and Django's ORM framework to store data.

3.3 Online Book Mall

Use Django to build an online book mall, use Django's ORM framework to store data, and use Django's user authentication system to control user login and permissions.

Summary

This article introduces the basic knowledge and project practice of Python and Django, and shows how to go from getting started to mastering Python and Django development technology. Python and Django have important applications in web development, web crawling, data analysis, artificial intelligence and other fields. These programming skills are also essential requirements for programmers. We encourage readers to continue learning Python and Django in depth and gain experience in practice.

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