473,890 Members | 1,157 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

PYTHONPATH breaks MySQLdb

i have a working MySQLdb module (/usr/lib/python2.4/site-packages/
MySQL_python-1.2.2-py2.4-linux-i686.egg), using it without problems.

"clean shell" after login:
python -c "import MySQLdb" reports no errors

if i export PYTHONPATH:
export PYTHONPATH=/var/www/projects/uv_portal/portal

python -c "import MySQLdb" reports no errors as in previous case

if i export PYTHONPATH:
export PYTHONPATH=/var/www/projects/uv_portal/portal/apps

i get this:
python -c "import MySQLdb"
Traceback (most recent call last):
File "<string>", line 1, in ?
ImportError: No module named MySQLdb

is there any reason why this happens?

Aljosa Mohorovic
Jun 27 '08 #1
1 1712
Aljosa Mohorovic schrieb:
i have a working MySQLdb module (/usr/lib/python2.4/site-packages/
MySQL_python-1.2.2-py2.4-linux-i686.egg), using it without problems.

"clean shell" after login:
python -c "import MySQLdb" reports no errors

if i export PYTHONPATH:
export PYTHONPATH=/var/www/projects/uv_portal/portal

python -c "import MySQLdb" reports no errors as in previous case

if i export PYTHONPATH:
export PYTHONPATH=/var/www/projects/uv_portal/portal/apps

i get this:
python -c "import MySQLdb"
Traceback (most recent call last):
File "<string>", line 1, in ?
ImportError: No module named MySQLdb

is there any reason why this happens?
Yes. You found a secret that nobody was supposed to know: Python doesn't
allow portal applications te be written! So it scans the pythonpath for
a suffix of "portal/apps", and refuses to import anything if it finds it.

Seriously: yes, there must be a reason, but nobody can tell because we
don't know & see what is beyond the apps-dir that might cause trouble.
Generally speaking, given that you can properly import MySQLdb without
any path set, you need to see if there is anything in your path that
somehow gets imported first and e.g. alters the sys.path.

Try

python -vc 'import MySQLdb'

and if that doesn't make things clearer, use strace.

Diez
Jun 27 '08 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
2103
by: Dave Harrison | last post by:
Hi all, got a problem combinging mx and MySQLdb, when I build and install both for my Python2.1 install on a Solaris 9 box I can import mx fine, but importing MySQLdb causing python to core dump. I am using egenenix 2.0.4 and MySQLdb 0.9.2. I have also replaced the -shared flag in the Makefile is /usr/local/lib/Python2.1/config with -G (a recommended solaris change to let the build of the modules work in the first place) -> notably I also...
1
2594
by: Peter Nikolaidis | last post by:
Greetings, I am attempting to get MySQLdb 0.9.2 installed on Mac OS 10.2 with a Fink distribution of Python 2.2.2. I have seen only a few posts on the subject, some of them relate to "conflicting header files," but I don't know what to do about conflicting header files, or where I would find them, and once I found them, which ones to remove. I have compiled MySQL 4.1 and installed into /usr/local/mysql, but since have moved to a Fink...
1
3012
by: Derek Fountain | last post by:
I was trying to use MySQLdb to connect to a database. All is OK, except I can't figure out how to get the details of an error. Suppose I try to connect to a non existant server, or with the wrong password - how do I get a meaningful error message which I can present to my user?
8
3055
by: Tero Pihlajakoski | last post by:
Hi, I've been experimenting on embedding Python to a C software, and ran into a little problem with PYTHONPATH (I'm running on linux). Here's the deal: When trying to call PyImport_Import("xyz"), Python returns an error "No module named xyz". The problem _seems_ to be that I had no PYTHONPATH variable defined (though python-shell works ok regardless), since the following in bash helps:
2
5069
by: Tim Williams | last post by:
I'm trying to write a simple python program to access a MySQL database. I'm having a problem with using MySQLdb to get the results of a SQL command in a cursor. Sometimes the cursor.execute works, sometimes not. From mysql: mysql> show databases; +-----------+ | Database |
1
2753
by: Steve | last post by:
Darwin steve.local 8.3.0 Darwin Kernel Version 8.3.0: Mon Oct 3 20:04:04 PDT 2005; root:xnu-792.6.22.obj~2/RELEASE_PPC Power Macintosh powerpc MacOSX 10.4.3 mysql Ver 14.7 Distrib 4.1.14, for apple-darwin8.2.0 (powerpc) using readline 4.3 runing the software gives me steve:~/MySQL-python-1.2.0 steve$ python setup.py build
0
1762
by: Michael Yanowitz | last post by:
Hello: Someone on my team tried out installing my Python code and found that setting PYTHONPATH does not work, but setting PATH environment variable works the way PYTHONPATH should. Is that how it supposed to be, or is that a bug or feature? -----Original Message----- (parts deleted) Subject: question on Python for windows
1
702
by: Yi Xing | last post by:
Hi, I met the following error when I tried to install MySQLdb. I had no problem installing numarray, Numeric, Rpy, etc. Does anyone know what's the problem? Thanks! running install running build running build_py creating build
0
314
by: Steve Holden | last post by:
Vaibhav.bhawsar wrote: imported The point here is that MySQLdb is a package, not a module. Some packages have their top-level __init__.py import the package's sub-modules or sub-packages to make them immediately available within the package namespace (which is why, for example, you can access os.path.* when you have imported os) and others don't. MySQLdb clearly doesn't need to import the cursors module for its own
0
9978
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9821
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
11229
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
1
10923
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10462
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
1
8016
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6042
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4676
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
4271
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.