Python Tutorial: ORM Connection to SQLite database, software Architecture basics

Python language because of its simple and easy to learn grammar, and high-efficiency applications, in recent years, rapid development, once entered the top six programming language rankings. This tutorial is written to enable programmers to learn the Python language faster. Can also be said to be a summary of their own learning. But the article tries to use the tone of teaching. Hope to help more of you who want to learn python.

Many of the conceptual things in this tutorial may not be burdensome, based on what you already know. If you do not understand a bit, please learn by yourself. Dedicated programmers are quick to get started with the Python language.

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Previous article: Getting Started with Python Tutorial: database operations, connecting to the MySQL database mainly explains the connection operation database using three kinds of connection client engines. This time only explains the use of the SQLAlchemy ORM operation database.

This article was built on the basis of previous articles. If you do not have a learning colleague, please click on the Python Development Tutorial Series-Link summary, continuous update.

What is ORM?

ORM, relational mapping, the popular point is to talk about the database of business data in the form of objects expressed. Organize these objects in an object-oriented manner.

ORM Benefits

Hide the database and let the business logic access the object

Simple operation and Rich interface.

Dynamic table data mapping, when the table structure changes, reduce code modification.

SQLAlchemy

SQLAlchemy is the most popular ORM framework in the Python community, known for stability and performance.

Installation of the SQLAlchemy module

1. Install by using Easy_install. Easy_install is a Python expansion pack that is primarily used to simplify the installation of third-party installation packages.

1. Install Easy_install: Download py file: Https://yunpan.cn/ckgHupUUZvCPH access password 595d

2. Navigate to the directory where ez_setup.py is located and execute the Python ez_setup.py on the command line

3. The scripts directory will be generated in the Python installation directory, with Easy_install.exe

4. Add the script directory to the environment variable path.

2. Installing the SQLAlchemy module

CMD command line, Run command: Easy_install sqlalchemy

Specific code shows:

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Python Tutorial: ORM Connection to SQLite database, software Architecture basics