i am trying to connect my oracle 11g database to django but it didn't connect it show some error like
return Database.connect(
django.db.utils.DatabaseError: DPI-1047: Cannot locate a 32-bit Oracle Client library: "C:\oraclexe\app\oracle\product\11.2.0\server\bin\oci.dll is not the correct architecture". See https://cx-oracle.readthedocs.io/en/latest/user_guide/installation.html for help
i sucessfully install 32 bit oracle client library but it still shows same error.
i am new to django and this error pops up when i use command python manage.py makemigrations it didn't create migration instead it shows this error.
it would be pleasure if someone helps me.
thankyou :)
The error is because you have a 64-bit Oracle Database installed, and its libraries are first in PATH so Python cx_Oracle tries to load them. Unfortunately your Python is 32-bit so there is a clash, which is shown by the error.
You choices are to set PATH to have your 32-bit Oracle client libraries first when you run Python. You probably don't want to do this globally since that might affect other Oracle DB tools, so you would need to do it in a cmd terminal, or set up a script that sets PATH and then calls python. You would call your new script anytime you wanted to run Python.
Overall, it's probably easier to uninstall Python, and install a 64-bit Python.
Related
I have a flask app running on Apache server using mod_wsgi. Everything works fine until I try to access the database using cx_Oracle. At that moment I get the following error:
sqlalchemy.exc.DatabaseError: (cx_Oracle.DatabaseError) DPI-1047: Cannot locate a 64-bit Oracle Client library: "The specified module could not be found". See https://oracle.github.io/odpi/doc/installation.html#windows for help.
I have added the client library path to the os environment variables.
It works well if I start the application from Pycharm IDE.
I have even added the following line in my .wsgi file.
sys.path.append('D:\FlaskDev\instantclient_11_2')
Can anyone help? Thanks in advance
If your python is 64Bits you must to use an 64 instant client too.
Try to follow this instructions.
I am unable to connect to our enterprise Oracle Db using python 3/cx_Oracle.
Installed are:
python 3 -32 bit
cx_Oracle
Oracle Client 12.1.0.2.0
My connection string attempt is:
import cx_Oracle
conn = cx_Oracle.connect(user='user', password='pwd', dsn='working_dsn')
My PATH variable includes the direct path to my working Oracle library (works using SQL Dev
Error message is:
cx_Oracle.DatabaseError: DPI-1050: Oracle Client library is at version 0.0 but must be at version 11.2 or higher
I have researched the Orcale installation instructions and have found no way to connect. I have previously tried with no success, had my computer reimaged and Oracle reinstalled to ensure only one version of Oracle and still no success. I need to move from R to Python and this is the last piece I need to make the switch. I am able to connect with R using JDBC driverclass/dbConnect.
If cx_Oracle wont work, is there another option for connecting to Oracle from Python3?
Any thoughts suggestions or places to look? Other connection types used?
Thanks in advance.
pip3 install cx_Oracle
first method：
db = cx_Oracle.connect('root/root#localhost: 1523/orcl')
Second method：
db = cx_Oracle.connect('root/root#localhost: 1523/orcl')
Third method
makedsn(IP/HOST, PORT, TNSNAME)
dsn = cx_Oracle.makedsn('localhost','1523','orcl')
db = cx_Oracle.connect('root','root',dsn)
The error you are getting suggests that you have an older version of the Oracle client installed on your machine. Search the directories of your PATH environment variable for OCI.DLL. If you find an older version you'll need to remove or rename it -- just be aware that whatever application put the file there will stop working!
Another possibility is to go to a command prompt and do the following
PATH=my_path_to_instant_client;%PATH%
python test_connect.py
Finally, make sure that if your Python is 32-bit, so is your instant client installation, and if your Python is 64-bit, make sure that your instant client installation is also 64-bit.
I want to learn how to work with an Oracle Database using Python. If I understand correctly, you can use Oracle Instant Client to connect to an Oracle Database remotely, but I cannot connect. I suspect the issue is that I don't know what arguments to use for the localhost/instance combo. I believe localhost is simply my machine name, or it may be literally 'localhost' which I have tried, but I don't know how and can't find help to tell me how to locate the service name for the database instance.
In a prompt I opened python, imported cx_Oracle and used 'Easy Connect String' as specified in this sample code, using either "(my machine name)/orclpdb" or literally "localhost/orclpdb" for DEFAULT_CONNECT_STRING.
The sample code creates a variable MAIN_CONNECT_STRING which I used in a command prompt to attempt to connect to the remote database:
cnxn = cx_Oracle.connect(MAIN_CONNECT_STRING)
cx_Oracle.DatabaseError: ORA-12541: TNS:no listener
I find answers that seem to be based on this, or others referring to tnsnames.ora, or listener.ora which are files I don't have. I also tried using instantclient-sqlplus-nt-12.2.0.1.0.
Background:
Windows 7
I downloaded cx_Oracle-6.1-cp27-cp27m-win32.whl and
instantclient-basic-nt-12.2.0.1.0.zip
I put the .whl into "C:\Python27\Scripts\"
I used python -m pip
install cx_Oracle --upgrade to install cx_Oracle.
I unzipped the instant client zip and put the child folder here
"C:\instantclient_12_2"
I added ;C:\instantclient_12_2 to the end of PATH.
Maybe you can use the installation instructions found in the
cx_Oracle documentation for Windows, cx_Oracle for Windows
Uninstall first the cx_Oracle you are using then try to follow the instructions found in the link above.
I am using cx_Oracle to access the Oracle database for some time and it works fine. Now my co-worker wants to run my scripts and we run across a problem with cx_Oracle. Wile trying to connect to the database we got the error: InterfaceError: Unable to acquire Oracle environment handle.
I read on a stackoverflow post that the probable error is that there are multiple oci.dll files found on the path. In our case we have two instant clients installed,I installed instant client 12 and there is another, very old installed from before that is used by some other applications. How can I tell Python which instant client to use?
She is using Windows XP and I installed her instant client 12, python 3.4 and cx_oracle 5.2, all 32 bit.
You need to ensure the PATH and ORACLE_HOME environment variables are pointing to the same Oracle client install. In the case of PATH (which you imply may contain multiple Oracle client installations), you need to ensure the one you wish to use appears first.
Instead of relying on system-wide settings for these environment variables, you may want to wrap your Python script in a batch file that ensures these variables are set correctly before starting the interpreter. For example, assuming you installed the Oracle 12.1 instant client to C:\Oracle\instantclient_12_1:
#ECHO OFF
SET ORACLE_HOME=C:\Oracle\instantclient_12_1
SET PATH=C:\Oracle\instantclient_12_1;%PATH%
python path_to_my_script.py
At work we have Oracle 7. I would like to use python to access the DB.
Has anyone done that or knows how to do it?
I have Windows XP, Python 2.6 and the cx_oracle version for python 2.6
However, when I try to import cx_oracle i get the following error:
ImportError: DLL load failed the module could not be found
Any help is appreciated!
Matt
cx_Oracle is currently only being provided with linkage to the 9i, 10g, and 11i clients. Install one of these clients and configure it to connect to the Oracle 7 database using the proper ORACLE_SID.
Make sure you have the location of the oracle .dll (o files set in your PATH environment variable. The location containing oci.dll should suffice.
I was running into that same problem at work. I finally dropped trying to use cx_Oracle and went with adodbapi. It worked with Oracle 8.
If you have ODBC configured then you can use it. It is available with ActivePython or as win32 extensions. You will obtain connection with:
connection = odbc.odbc('db_alias/user/passwd')
Optionally you can use Jython and thin JDBC client. Instalation of client is not required. With Jython you have access to db via db url:
db = DriverManager.getConnection(db_url, usr, passwd)
where db_url looks like:
jdbc:oracle:thin:user/passwd#machine_ip:port:dbname