How do I connect to a MySQL Database in Python?

Question

How do I connect to a MySQL database using a python program?

Answer 1

you can connect your python code to mysql in this way.

import MySQLdb
db = MySQLdb.connect(host="localhost",
                 user="appuser",
                 passwd="",
                 db="onco")

cursor = db.cursor()

Answer 2

For python 3.3

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

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

(you don't need cython) quick and painless

Answer 3

Here's one way to do it, using MySQLdb, which only supports Python 2:

#!/usr/bin/python
import MySQLdb

# Connect
db = MySQLdb.connect(host="localhost",
                     user="appuser",
                     passwd="",
                     db="onco")

cursor = db.cursor()

# Execute SQL select statement
cursor.execute("SELECT * FROM location")

# Commit your changes if writing
# In this case, we are only reading data
# db.commit()

# Get the number of rows in the resultset
numrows = cursor.rowcount

# Get and display one row at a time
for x in range(0, numrows):
    row = cursor.fetchone()
    print row[0], "-->", row[1]

# Close the connection
db.close()

Reference here

Answer 4

As a db driver, there is also oursql. Some of the reasons listed on that link, which say why oursql is better:

• oursql has real parameterization, sending the SQL and data to MySQL completely separately.
• oursql allows text or binary data to be streamed into the database and streamed out of the database, instead of requiring everything to be buffered in the client.
• oursql can both insert rows lazily and fetch rows lazily.
• oursql has unicode support on by default.
• oursql supports python 2.4 through 2.7 without any deprecation warnings on 2.6+ (see PEP 218) and without completely failing on 2.7 (see PEP 328).
• oursql runs natively on python 3.x.

So how to connect to mysql with oursql?

Very similar to mysqldb:

import oursql

db_connection = oursql.connect(host='127.0.0.1',user='foo',passwd='foobar',db='db_name')
cur=db_connection.cursor()
cur.execute("SELECT * FROM `tbl_name`")
for row in cur.fetchall():
    print row[0]

The tutorial in the documentation is pretty decent.

And of course for ORM SQLAlchemy is a good choice, as already mentioned in the other answers.

Answer 5

Just a modification in above answer. Simply run this command to install mysql for python

sudo yum install MySQL-python
sudo apt-get install MySQL-python

remember! It is case sensitive.

Answer 6

Try using MySQLdb. MySQLdb only supports Python 2.

There is a how to page here: http://www.kitebird.com/articles/pydbapi.html

---

From the page:

# server_version.py - retrieve and display database server version

import MySQLdb

conn = MySQLdb.connect (host = "localhost",
                        user = "testuser",
                        passwd = "testpass",
                        db = "test")
cursor = conn.cursor ()
cursor.execute ("SELECT VERSION()")
row = cursor.fetchone ()
print "server version:", row[0]
cursor.close ()
conn.close ()