Basic knowledge of Django web programming: from getting started with Python to building web applications

Python is currently one of the most popular programming languages ​​and one of the mainstream languages ​​in the field of Web programming. In Python, Django is a widely used web framework. It provides many convenient functions and powerful ORM database operation functions, allowing developers to quickly build web applications.

This article will introduce the basic knowledge of Django web programming, including the basics of Python language, the basics of Django framework, Django application development and deployment, etc. I hope it will be helpful to beginners.

1. Python Language Basics

The Python language is an interpreted language. It is easy to learn, has concise code, and is easy to read. It is very suitable for Web programming development. Basic concepts that need to be mastered in Python language learning include:

1. Variables and data types: Python variable names do not need to be declared in advance and support multiple data types, such as integers, floating point numbers, strings, etc. .
2. Operators: Operators in Python include arithmetic operators, comparison operators, logical operators, etc.
3. Control flow statements: Control flow statements in Python include conditional statements and loop statements, such as if statements, while statements, for statements, etc.
4. Functions and modules: Functions and modules are conventional ways of organizing code in Python. Functions can accept parameters and return values, while modules are ways of organizing functions and variables.

2. Django Framework Basics

Django is a web framework written in Python. It provides a series of simple and easy-to-use APIs, making web development very easy. The basic concepts that need to be mastered in learning the Django framework include:

1. Installation and configuration: Use the pip command to install the Django framework, and Django needs to be configured at the same time.
2. MVC pattern: Django is a framework based on the MVC pattern. MVC is the abbreviation of Model-View-Controller, which refers to the three components of the application.
3. URL configuration: Django's URL configuration is very convenient. You only need to map the URL and the corresponding view function.
4. Template system: Django provides a template system that can separate HTML pages and Python code, allowing developers to focus more on business logic.

3. Django application development

After mastering the basic knowledge of Python and the basics of the Django framework, you can start developing Django applications. A regular Django application requires the following steps:

1. Create a Django project: Use the command django-admin startproject to create a new Django project.
2. Write a view function: Write a view function to process the request, and the function returns an HttpResponse object.
3. Configure URL routing: Configure URL routing in the urls.py file and map the URL to the corresponding view function.
4. Writing templates: Write HTML template files, which may require the use of Django template tags and template variables.
5. ORM operation: Django supports ORM to operate the database, and the database can be easily operated by defining model classes.

4. Django application deployment

After completing Django application development, application deployment needs to be carried out. Regular Django applications can be deployed using the following steps:

1. Set DEBUG to False: In a production environment, Django's DEBUG needs to be set to False to avoid security issues and performance issues.
2. Deploy static files: Use the collectstatic command to deploy static files to a static file server or CDN service.
3. Use Wsgi server: Use WSGI server to integrate Django application with Web server to provide services in production environment.

Conclusion

This article introduces the basic knowledge of Django Web programming, including the basics of Python language, the basics of Django framework, Django application development and deployment, etc. I hope it can help beginners, thereby speeding up learning and improving development efficiency.

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