Trio-MySQL

Table of Contents

• Requirements
• Installation
• Documentation
• Example
• Resources
• License

This package contains a pure-Python and Trio-enhanced MySQL client library. It is a mostly-straightforward clone of PyMySQL, adding async methods compatible with the Trio framework.

NOTE: Trio-MySQL tries to adhere to (an async version of) the high level database APIs defined in PEP 249. Some differences, however, are unavoidable.

Requirements

• Python -- one of the following:
  • CPython >= 3.6
  • PyPy >= 5.5
• MySQL Server -- one of the following:
  • MySQL >= 5.5
  • MariaDB >= 5.5

Installation

Package is uploaded on PyPI.

You can install it with pip:

$ python3 -m pip install trio_mysql

To use "sha256_password" or "caching_sha2_password" for authenticate, you need to install additional dependency:

$ python3 -m pip install trio_mysql[rsa]

To use MariaDB's "ed25519" authentication method, you need to install additional dependency:

$ python3 -m pip install PyMySQL[ed25519]

Documentation

Documentation is available online: http://trio_mysql.readthedocs.io/

For support, please refer to the StackOverflow.

Example

The following examples make use of a simple table

CREATE TABLE `users` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `email` varchar(255) COLLATE utf8_bin NOT NULL,
    `password` varchar(255) COLLATE utf8_bin NOT NULL,
    PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin
AUTO_INCREMENT=1 ;

import trio_mysql.cursors

# Connect to the database
connection = trio_mysql.connect(host='localhost',
                             user='user',
                             password='passwd',
                             db='db',
                             charset='utf8mb4',
                             cursorclass=trio_mysql.cursors.DictCursor)

async with connection as conn:
    async with conn.cursor() as cursor:
        # Create a new record
        sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"
        await cursor.execute(sql, ('[email protected]', 'very-secret'))

    # connection is not autocommit by default. So you must commit to save
    # your changes.
    conn.commit()

    # You can set up a transaction:
    async with conn.transaction():
        async with conn.cursor() as cursor:
            # Create a new record
            sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"
            await cursor.execute(sql, ('[email protected]', 'totally-secret'))

    # ... or use a cursor directly, for autocommit:
    async with conn.cursor() as cursor:
        # Read a single record
        sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"
        await cursor.execute(sql, ('[email protected]',))
        result = await cursor.fetchone()
        print(result)

This example will print:

{'password': 'very-secret', 'id': 1}

Resources

• DB-API 2.0: https://www.python.org/dev/peps/pep-0249/
• MySQL Reference Manuals: https://dev.mysql.com/doc/
• MySQL client/server protocol: https://dev.mysql.com/doc/internals/en/client-server-protocol.html
• "Connector" channel in MySQL Community Slack: https://lefred.be/mysql-community-on-slack/

Trio chat: https://gitter.im/python-trio/general

License

Trio-MySQL is released under the MIT License. See LICENSE for more information.