如何在 Windows 上的 Python 3 中连接到 MySQL？

Question

I am using ActiveState Python 3 on Windows and wanted to connect to my MySQL database. I heard that mysqldb was the module to use. I can't find mysqldb for Python 3.

Is there a repository available where the binaries exist for mysqldb ? How can I connect to MySQL in Python 3 on Windows?

Answer 1

There are currently a few options for using Python 3 with mysql:

https://pypi.python.org/pypi/mysql-connector-python

• Officially supported by Oracle
• Pure python
• A little slow
• Not compatible with MySQLdb

https://pypi.python.org/pypi/pymysql

• Pure python
• Faster than mysql-connector
• Almost completely compatible with MySQLdb , after calling pymysql.install_as_MySQLdb()

https://pypi.python.org/pypi/cymysql

• fork of pymysql with optional C speedups

https://pypi.python.org/pypi/mysqlclient

• Django's recommended library.
• Friendly fork of the original MySQLdb, hopes to merge back some day
• The fastest implementation, as it is C based.
• The most compatible with MySQLdb, as it is a fork
• Debian and Ubuntu use it to provide both python-mysqldb and python3-mysqldb packages.

benchmarks here: https://github.com/methane/mysql-driver-benchmarks

Answer 2

You should probably use pymysql - Pure Python MySQL client instead.
It works with Python 3.x, and doesn't have any dependencies.

This pure Python MySQL client provides a DB-API to a MySQL database by talking directly to the server via the binary client/server protocol.

Example:

 import pymysql conn = pymysql.connect(host='127.0.0.1', unix_socket='/tmp/mysql.sock', user='root', passwd=None, db='mysql') cur = conn.cursor() cur.execute("SELECT Host,User FROM user") for r in cur: print(r) cur.close() conn.close()

Answer 3

if you want to use MySQLdb first you have to install pymysql on your pc by typing in cmd of windows

    pip install pymysql

then in python shell, type

    import pymysql
    pymysql.install_as_MySQLdb()
    import MySQLdb
    db = MySQLdb.connect("localhost" , "root" , "password")

this will establish the connection.

Answer 4

I also tried using pymysql (on my Win7 x64 machine, Python 3.3), without too much luck. I downloaded the .tar.gz, extract, ran "setup.py install", and everything seemed fine. Until I tried connecting to a database, and got "KeyError [56]". An error which I was unable to find documented anywhere.

So I gave up on pymysql, and I settled on the Oracle MySQL connector .

It comes as a setup package, and works out of the box. And it also seems decently documented.

Answer 5

Summary

Mysqlclient is the best alternative(IMHO) because it works flawlessly with Python 3+ , follows expected conventions (unlike mysql connector), uses the object name mysqldb which enables convenient porting of existing software and is used by Django for Python 3 builds

Is there a repository available where the binaries exist for mysqldb?

Yes. mysqlclient allows you to use mysqldb functions. Though, remember this is not a direct port by mysqldb, but a build by mysqlclient

How can I connect to MySQL in Python 3 on Windows?

pip install mysqlclient

Example

#!/Python36/python
#Please change above path to suit your platform.  Am running it on Windows
import MySQLdb
db = MySQLdb.connect(user="my-username",passwd="my-password",host="localhost",db="my-databasename")
cursor = db.cursor()
cursor.execute("SELECT * from my-table-name")
data=cursor.fetchall()
for row in data :
    print (row)
db.close()

I can't find mysqldb for Python 3.

mysqldb has not been ported yet

Answer 6

Untested, but there are some binaries available at:

Unofficial Windows Binaries

Answer 7

PyMySQL gives MySQLDb like interface as well. You could try in your initialization:

import pymysql
pymysql.install_as_MySQLdb()

Also there is a port of mysql-python on github for python3.

https://github.com/davispuh/MySQL-for-Python-3

Answer 8

Oracle/MySQL provides an official, pure Python DBAPI driver: http://dev.mysql.com/downloads/connector/python/

I have used it with Python 3.3 and found it to work great. Also works with SQLAlchemy.

See also this question: Is it still too early to hop aboard the Python 3 train?

Answer 9

On my mac os maverick i try this:

• In Terminal type:

  1) mkdir -p ~/bin ~/tmp ~/lib/python3.3 ~/src 2) export TMPDIR=~/tmp
  3) wget -O ~/bin/2to3
  4) http://hg.python.org/cpython/raw-file/60c831305e73/Tools/scripts/2to3 5) chmod 700 ~/bin/2to3 6) cd ~/src 7) git clone https://github.com/petehunt/PyMySQL.git 8) cd PyMySQL/
  9) python3.3 setup.py install --install-lib=$HOME/lib/python3.3 --install-scripts=$HOME/bin

After that, enter in the python3 interpreter and type:

1. import pymysql . If there is no error your installation is ok. For verification write a script to connect to mysql with this form:

2. # a simple script for MySQL connection import pymysql db = pymysql.connect(host="localhost", user="root", passwd=" * ", db="biblioteca") #Sure, this is information for my db # close the connection db.close ()*

Give it a name ("con.py" for example) and save it on desktop. In Terminal type "cd desktop" and then $python con.py If there is no error, you are connected with MySQL server. Good luck!

Answer 10

This does not fully answer my original question, but I think it is important to let everyone know what I did and why.

I chose to continue using python 2.7 instead of python 3 because of the prevalence of 2.7 examples and modules on the web in general.

I now use both mysqldb and mysql.connector to connect to MySQL in Python 2.7. Both are great and work well. I think mysql.connector is ultimately better long term however.

Answer 11

CyMySQL https://github.com/nakagami/CyMySQL

I have installed pip on my windows 7, with python 3.3 just pip install cymysql

(you don't need cython) quick and painless

Answer 12

I'm using cymysql with python3 on a raspberry pi I simply installed by: sudo pip3 install cython sudo pip3 install cymysql where cython is not necessary but should make cymysql faster

So far it works like a charm and very similar to MySQLdb

Answer 13

This is a quick tutorial on how to get Python 3.7 working with Mysql
Thanks to all from who I got answers to my questions
- hope this helps somebody someday.
----------------------------------------------------
My System:
Windows Version: Pro 64-bit

REQUIREMENTS.. download and install these first...
1. Download Xampp..
https://www.apachefriends.org/download.html
2. Download Python
https://www.python.org/downloads/windows/

--------------
//METHOD
--------------
Install xampp first after finished installing - install Python 3.7.
Once finished installing both - reboot your windows system.
Now start xampp and from the control panel - start the mysql server.
Confirm the versions by opening up CMD and in the terminal type

c:\>cd c:\xampp\mysql\bin

c:\xampp\mysql\bin>mysql -h localhost -v
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 10.1.21-MariaDB mariadb.org binary distribution

Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.

This is to check the MYSQL version

c:\xampp\mysql\bin>python
Python 3.7.0b3 (v3.7.0b3:4e7efa9c6f, Mar 29 2018, 18:42:04) [MSC v.1913 64 bit (AMD64)] on win32

This is to check the Python version
Now that both have been confirmed type the following into the CMD...

c:\xampp\mysql\bin>pip install pymysql

After the install of pymysql is completed.
create a new file called "testconn.py" on your desktop or whereever for quick access.
Open this file with sublime or another text editor and put this into it.
Remember to change the settings to reflect your database.

#!/usr/bin/python
import pymysql
pymysql.install_as_MySQLdb() 

import MySQLdb
db = MySQLdb.connect(user="yourusernamehere",passwd="yourpasswordhere",host="yourhosthere",db="yourdatabasehere")
cursor = db.cursor()
cursor.execute("SELECT * from yourmysqltablehere")
data=cursor.fetchall()
for row in data :
    print (row)
db.close()

Now in your CMD - type

c:\Desktop>testconn.py

And thats it... your now fully connected from a python script to mysql...
Enjoy...

Answer 14

imports

import pymysql

open database connection

db = pymysql.connect("localhost","root","","ornament")

prepare a cursor object using cursor() method

cursor = db.cursor()

sql = "SELECT * FROM item"

cursor.execute(sql)

Fetch all the rows in a list of lists.

results = cursor.fetchall()
for row in results:
   item_title = row[1]
   comment = row[2]
   print ("Title of items are the following  = %s,Comments are the following = %s" % \
          (item_title, comment))