MySQLdb in Python: "Can't connect to MySQL server on 'localhost'"

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I have installed MySQLdb for Python and I am able to import MySQLdb. Now I try to connect to the MySQL Community Server on my local machine, using this code:

db=MySQLdb.connect(
    host="localhost",
    user="br_admin",
    passwd="blabla",
    db="br_brain"
)

This code fails with this error:

Traceback (most recent call last):
  File "<pyshell#22>", line 5, in <module>
  db="brainse_brain"
File "C:\Python27\lib\site-packages\MySQLdb\__init__.py", line 81, in Connect
return Connection(*args, **kwargs)
File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 187, in __init__
super(Connection, self).__init__(*args, **kwargs2)
OperationalError: (2003, "Can't connect to MySQL server on 'localhost' (10061)")

How do I resolve this error?

Make sure to provide the proper host and port:

'default': {
    'ENGINE': 'django.db.backends.mysql', 
    'NAME': 'yourdbname',                      
    'USER': 'root',                      
    'PASSWORD': 'your password',         
    'HOST': '127.0.0.1',                 
    'PORT': '3306',                      
},

This is my settings.py file config for my django app.

Same for you please take host "127.0.0.1" and port "3306".

This might solve your problem. And for python idle I've tested like...

>>> import MySQLdb
>>> Con = MySQLdb.Connect(host="127.0.0.1", port=3306, user="yoruname", passwd="yourpwd", db="test")
>>> Cursor = Con.cursor()
>>> sql = "SELECT * FROM test.testing"
>>> Cursor.execute(sql)
2L

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I had the same trouble too, I'm working on a Windows of 64 bits, and the solution just was changing the host variable value. I had set "localhost" when the correct value have to be "127.0.0.1". However, when I'm working on Windows of 32 bits. I can set "localhost" or "127.0.0.1" in the host variable value and no matter, my django's project runs perfectly.

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This will work fine :

    db = MySQLdb.connect(host="127.0.0.1",user="db_username",passwd="db_password",db="db_name") 

or

   db=  MySQLdb.connect("127.0.0.1","db_username","db_password","db_name")

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In Windows 32, if you set host as 127.0.01 it gives the down error:

OperationalError: (2005, "Unknown MySQL server host '127.0.01' (0)")

But if you set host as 127.0.0.1 then you get no error.

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If you are using windows you should specify the IP to "127.0.0.1", using "localhost" will give you that error 2003. On Ubuntu I had no problem.

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MySQL Python tutorial - programming MySQL in Python, 5.1 Connecting to MySQL Using Connector/Python. The connect() constructor creates a connection to the MySQL server and returns a MySQLConnection object. ALSO - Replace MySQLdb in existing code quickly and transparently. If you have existing code that uses MySQLdb, you can easily replace it with pymysql using this simple process: # import MySQLdb << Remove this line and replace with: import pymysql pymysql.install_as_MySQLdb() All subsequent references to MySQLdb will use pymysql transparently.

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Comments
  • Can you connect to the server on localhost outside of python?
  • NO.The problem is.. Im not able to figure out the host name from my cpanel. In my phpmyadmin in variables i have the hostname as "XXXXXXX"... but when I try its effectless.....
  • Actually the problem in my case was that I was using "localhost" instead of "127.0.0.1". Anyway, the simple test you provided was a very welcome help.
  • In my case, I accidently supplied the username as the password. Check that all your credentials are correct (instead of assuming they are).
  • Documentation for mysqldb says it defaults to 3306 however at least as of 1.2.3rc1 under python 2.6 I can't connect remotely unless explicitly setting port to 3306.
  • great, helped me a lot!
  • That's because 127.0.01 isn't a valid IP address.
  • couldn't get when i give 127.0.01. But got by giving host as 127.0.0.1
  • Of course, that's a typo. IP address consists of 4 (1-byte) integers.