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MySQLdb won't connect to my MySQL 5.1 on on Windows 7.
This worked on Windows 2000, but of course I've had to
reinstall everything.

The MySQL command line client, "mysql", connects
to the database without problems.

Installed:

ActiveState Python 2.6 (Win32)
"mysql-essential-5.1.47.win32.msi"
"MySQL-python-1.2.2.win32.py2.6.exe"

MySQL is configured for connections over named pipes only; it's
not running as a TCP server. Is MySQLdb trying to use TCP for a local
connection? The MySQLdb documentation says that connections to
"localhost" on Windows will be made over named pipes. Does that
not work?

my.cnf reads

skip-networking
enable-named-pipe

# The Pipe the MySQL Server will use
socket=mysql

Error messages:

\python26\python
ActivePython 2.6.5.12 (ActiveState Software Inc.) based on
Python 2.6.5 (r265:79063, Mar 20 2010, 14:22:52) [MSC v.1500 32 bit
(Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import MySQLdb
C:\python26\lib\site-packages\MySQLdb\__init__.py:34:
DeprecationWarning: the sets module is deprecated
from sets import ImmutableSet
>>> db = MySQLdb.connect("localhost","root","????","???")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\python26\lib\site-packages\MySQLdb\__init__.py", line 74, in
Connect
return Connection(*args, **kwargs)
File "C:\python26\lib\site-packages\MySQLdb\connections.py", line 170,
in __init__
super(Connection, self).__init__(*args, **kwargs2)
_mysql_exceptions.OperationalError:
(2003, "Can't connect to MySQL server on 'localhost' (10061)")
>>>

John Nagle

On Thu, 10 Jun 2010 14:15:21 -0700, John Nagle <>
declaimed the following in gmane.comp.python.general:


> MySQL is configured for connections over named pipes only; it's
> not running as a TCP server. Is MySQLdb trying to use TCP for a local
> connection? The MySQLdb documentation says that connections to
> "localhost" on Windows will be made over named pipes. Does that
> not work?
>
I wouldn't be a tad surprised if M$ Win7 has implemented some
security/privilege scheme on named pipes such that cross process/user
access is blocked.

A quick Google shows that a similar problem crops up for users of M$
SQL Server
--
Wulfraed Dennis Lee Bieber AF6VN
HTTP://wlfraed.home.netcom.com/

On 6/10/2010 11:58 PM, Dennis Lee Bieber wrote:
> On Thu, 10 Jun 2010 14:15:21 -0700, John Nagle<>
> declaimed the following in gmane.comp.python.general:
>
>
>> MySQL is configured for connections over named pipes only; it's
>> not running as a TCP server. Is MySQLdb trying to use TCP for a local
>> connection? The MySQLdb documentation says that connections to
>> "localhost" on Windows will be made over named pipes. Does that
>> not work?
>>
> I wouldn't be a tad surprised if M$ Win7 has implemented some
> security/privilege scheme on named pipes such that cross process/user
> access is blocked.

The MySQL command line client can connect with the same privileges.
So that may not be the problem.

John Nagle

I reconfigured MySQL to allow local network connections, and
now MySQLdb works over TCP. It doesn't seem to be able to use
Windows 7 named pipes, although the "mysql" command line client can.
There may be a bug. This wouldn't be noticed unless MySQL
was configured without network connections, which is rare. I set
up MySQL that way on a development machine with a local MySQL instance.

John Nagle

On 6/11/2010 9:32 AM, John Nagle wrote:
> On 6/10/2010 11:58 PM, Dennis Lee Bieber wrote:
>> On Thu, 10 Jun 2010 14:15:21 -0700, John Nagle<>
>> declaimed the following in gmane.comp.python.general:
>>
>>
>>> MySQL is configured for connections over named pipes only; it's
>>> not running as a TCP server. Is MySQLdb trying to use TCP for a local
>>> connection? The MySQLdb documentation says that connections to
>>> "localhost" on Windows will be made over named pipes. Does that
>>> not work?
>>>
>> I wouldn't be a tad surprised if M$ Win7 has implemented some
>> security/privilege scheme on named pipes such that cross process/user
>> access is blocked.
>
> The MySQL command line client can connect with the same privileges.
> So that may not be the problem.
>
> John Nagle

On Fri, 11 Jun 2010 09:32:54 -0700, John Nagle <>
declaimed the following in gmane.comp.python.general:

> The MySQL command line client can connect with the same privileges.
> So that may not be the problem.
>
Was that client built with the exact same configuration as the
MySQLdb adapter?
--
Wulfraed Dennis Lee Bieber AF6VN
HTTP://wlfraed.home.netcom.com/