This package contains a pure-Python MySQL client library. The goal of PyMySQL is to be a drop-in replacement for MySQLdb and work on CPython, PyPy and IronPython.

Requirements

Python -- one of the following:
- CPython >= 2.6 or >= 3.3
- PyPy >= 2.3
- IronPython 2.7
MySQL Server -- one of the following:
- MySQL >= 4.1
- MariaDB >= 5.1

Installation

The last stable release is available on PyPI and can be installed with pip:

$ pip install PyMySQL

Alternatively (e.g. if pip is not available), a tarball can be downloaded from GitHub and installed with Setuptools:

$ # X.X is the desired PyMySQL version (e.g. 0.5 or 0.6).
$ curl -L https://github.com/PyMySQL/PyMySQL/tarball/pymysql-X.X | tar xz
$ cd PyMySQL*
$ python setup.py install
$ # The folder PyMySQL* can be safely removed now.

Test Suite

If you would like to run the test suite, create database for test like this:

mysql -e 'create database test_pymysql  DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'
mysql -e 'create database test_pymysql2 DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'

Then, copy the file .travis.databases.json to pymysql/tests/databases.json and edit the new file to match your MySQL configuration:

$ cp .travis.databases.json pymysql/tests/databases.json
$ $EDITOR pymysql/tests/databases.json

To run all the tests, execute the script runtests.py:

$ python runtests.py

A tox.ini file is also provided for conveniently running tests on multiple Python versions:

$ tox

CRUD Exapmle

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 ;

Create new record

import pymysql
connection = pymysql.connect(host='localhost',
                             user='user',
                             passwd='passwd',
                             db='db')
with connection.cursor() as cursor:
    sql = ("INSERT INTO `users` "
           "(`email`, `password`) "
           "VALUES ('webmaster@python.org', 'very-secret');")
    cursor.execute(sql)
connection.commit()
connection.close()

Read records

import pymysql
connection = pymysql.connect(host='localhost',
                             user='user',
                             passwd='passwd',
                             db='db',
                             cursorclass=pymysql.cursors.DictCursor)
cursor = connection.cursor()

sql = ("SELECT `id`, `password` "
       "FROM `users` WHERE `email`='%s'") % 'webmaster@python.org'

try:
    cursor.execute(sql)
    result = cursor.fetchone()
finally:
    connection.close()
print(result)

prints

{'password': 'very-secret', 'id': 4}

assuming the first matching recording has id 4 and password 'very-secret'. If there is no match, None is printed.

Update records

import pymysql
connection = pymysql.connect(host='localhost',
                             user='user',
                             passwd='passwd',
                             db='db')
cursor = connection.cursor()

sql = ("UPDATE `users` SET `email`= 'maxmustermann@email.de' "
       "WHERE `id` = %i LIMIT 1") % 42

try:
    cursor.execute(sql)
    connection.commit()
finally:
    connection.close()

Delete records

import pymysql
connection = pymysql.connect(host='localhost',
                             user='user',
                             passwd='passwd',
                             db='db')
cursor = connection.cursor()

sql = ("DELETE FROM `users` WHERE `id` = %i") % 42

try:
    cursor.execute(sql)
    connection.commit()
finally:
    connection.close()

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

License

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