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uPyMySQL

.. contents:: Table of Contents :local:

This package contains a pretty rough hack of the pure-Python MySQL client library. The goal of uPyMySQL is to be a drop-in replacement for MySQLdb and work on uPython.

NOTE: PyMySQL doesn't support low level APIs _mysql provides like data_seek, store_result, and use_result. You should use high level APIs defined in PEP 249. But some APIs like autocommit and ping are supported because PEP 249 doesn't cover their usecase. Ditto for uPyMySQL

.. _PEP 249: https://www.python.org/dev/peps/pep-0249/

Requirements

• uPython_

• MySQL Server -- one of the following:

  • MySQL_ >= 4.1 (tested with only 5.5~)
  • MariaDB_ >= 5.1

.. _uPython: https://micropython.org/ .. _MySQL: http://www.mysql.com/ .. _MariaDB: https://mariadb.org/

Installation

Clone from Git and copy the upymysql folder onto your microcontroller
Most likely directly copying onto your microcontroller will fail.  
You will likely need to re-compile micropython including upymysql into the firmware

Documentation

You're pretty much looking at it

Example

No Guarantees that these work yet:

The following examples make use of a simple table

.. code:: sql

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 ;

.. code:: python

import upymysql
import upymysql.cursors

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

try:
    with connection.cursor() as cursor:
        # Create a new record
        sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"
        cursor.execute(sql, ('webmaster@python.org', 'very-secret'))

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

    with connection.cursor() as cursor:
        # Read a single record
        sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"
        cursor.execute(sql, ('webmaster@python.org',))
        result = cursor.fetchone()
        print(result)
finally:
    connection.close()

This example will print:

.. code:: python

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

Resources

DB-API 2.0: http://www.python.org/dev/peps/pep-0249

MySQL Reference Manuals: http://dev.mysql.com/doc/

MySQL client/server protocol: http://dev.mysql.com/doc/internals/en/client-server-protocol.html

PyMySQL mailing list: https://groups.google.com/forum/#!forum/pymysql-users

PyMySQL Github site: https://github.com/PyMySQL/PyMySQL

uPython: https://micropython.org/

License

PyMySQL is released under the MIT License. See LICENSE for more information.