![]() The db_connect(self) method connects to the MySQL server and return a connection using the return db_con statement. The DatabaseGateway class has three methods: The DatabaseGateway is the only class in the database_gateway.py file. Save and close the database_gateway.py file. Return json.dumps(json.loads(json_object), indent = 2)ĭef db_execute(self, query_string, data): import nnectorįor (column_name, column_value) in enumerate(row): $ nano database_gateway.pyĮnter the following information into the file and replace EXAMPLE_PASSWORD with the correct value depending on the database user account credentials. Open a new database_gateway.py file in a text editor. Follow the steps below to create a separate database_gateway module for performing database operations: A module can have one or several classes that you can reuse in your project. After creating all the source code files, you should have the following files in the project directory. Review the layout of the source code files from the illustration below. This directory helps to keep your application organized. Create the source code files by following the steps below:Ĭreate a new project directory for the sample application. This step focuses on creating the necessary modules for accepting data and passing it to the MySQL server through some Python code. The customers table later receives data from a Python script. Query OK, 0 rows affected (0.01 sec)ĭon't insert any records into the customers table. mysql> CREATE TABLE customers (Ĭustomer_id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY, Use the AUTO_INCREMENT keyword to allow MySQL to assign a new customer_id every time you insert a new record. mysql> USE e_commerce Ĭreate a customers table with three columns. GRANT ALL PRIVILEGES ON e_commerce.* TO PRIVILEGES mysql> CREATE DATABASE e_commerce ĬREATE USER IDENTIFIED WITH mysql_native_password BY 'EXAMPLE_PASSWORD' Replace EXAMPLE_PASSWORD with a strong password. Then, issue the SQL commands below to create a sample e_commerce database and an e_commerce_user account. $ sudo mysql -u root -pĮnter the password when prompted and press ENTER to proceed. Log in to the MySQL server as a root user. Execute the steps below to set up the database: For this project, you require a sample database and a table. You now have the correct Python environment and a driver for connecting to the MySQL server. ![]() The mysql-connector-python library is a self-contained driver for communicating to MySQL from Python. Use the pip package to install the mysql-connector-python library. Install pip, a tool for installing Python modules/libraries. Follow the steps below to verify your Python version and download the necessary dependency package and libraries required to run this application: Verify the Python Version and Install Dependency Packages and Librariesīy default, Ubuntu 20.04 ships with Python. This guide focuses on implementing a CRUD application with Python and MySQL on the Ubuntu 20.04 server. You can use Python to interact with most database management systems. Update: A function that modifies the details of a record using the UPDATE command.ĭelete: A function that removes a record from a database table using the DELETE command. Read: A function that retrieves data from a database using the SELECT command The Create, Read, Update, and Delete (CRUD) operations refer to the following functions for implementing persistent data storage applications:Ĭreate: A function that adds data to a database using the INSERT command. It's suitable for web development, API design, command-line tools, and more. Python is a general-purpose programming language that focuses on code readability.
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