install cx_oracle for python

Question

Am on Debian 5, I\'ve been trying to install cx_oracle module for python without any success. First, I installed oracle-xe-client and its dependency (followed tutorial in the fo

Answer 1

The alternate way, that doesn't require RPMs. You need to be root.

1. Dependencies

   Install the following packages:

   apt-get install python-dev build-essential libaio1
   

2. Download Instant Client for Linux x86-64

   Download the following files from Oracle's download site:

3. Extract the zip files

   Unzip the downloaded zip files to some directory, I'm using:

   /opt/ora/
   

4. Add environment variables

   Create a file in /etc/profile.d/oracle.sh that includes

   export ORACLE_HOME=/opt/ora/instantclient_11_2
   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME
   

   Create a file in /etc/ld.so.conf.d/oracle.conf that includes

   /opt/ora/instantclient_11_2
   

   Execute the following command

   sudo ldconfig
   

   Note: you may need to reboot to apply settings

5. Create a symlink

   cd $ORACLE_HOME 
   ln -s libclntsh.so.11.1 libclntsh.so
   

6. Install cx_Oracle python package

   • You may install using pip

     pip install cx_Oracle
     

   • Or install manually

     Download the cx_Oracle source zip that corresponds with your Python and Oracle version. Then expand the archive, and run from the extracted directory:

     python setup.py build 
     python setup.py install
     

Answer 2

I recommend that you grab the rpm files and install them with alien. That way, you can later on run apt-get purge no-longer-needed.

In my case, the only env variable I needed is LD_LIBRARY_PATH, so I did:

echo export LD_LIBRARY_PATH=/usr/lib/oracle/11.2/client/lib >> ~/.bashrc
source ~/.bashrc

I suppose in your case that path variable will be /usr/lib/oracle/xe/app/oracle/product/10.2.0/client/lib.

Answer 3

This just worked for me on Ubuntu 16:

Download ('instantclient-basic-linux.x64-12.2.0.1.0.zip' and 'instantclient-sdk-linux.x64-12.2.0.1.0.zip') from Oracle web site and then do following script (you can do piece by piece and I did as a ROOT):

apt-get install -y python-dev build-essential libaio1
mkdir -p /opt/ora/
cd /opt/ora/

## Now put 2 ZIP files:
# ('instantclient-basic-linux.x64-12.2.0.1.0.zip' and 'instantclient-sdk-linux.x64-12.2.0.1.0.zip') 
# into /opt/ora/ and unzip them -> both will be unzipped into 1 directory: /opt/ora/instantclient_12_2 

rm -rf /etc/profile.d/oracle.sh
echo "export ORACLE_HOME=/opt/ora/instantclient_12_2"  >> /etc/profile.d/oracle.sh
echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME"  >> /etc/profile.d/oracle.sh
chmod 777 /etc/profile.d/oracle.sh
source /etc/profile.d/oracle.sh
env | grep -i ora  # This will check current ENVIRONMENT settings for Oracle


rm -rf /etc/ld.so.conf.d/oracle.conf
echo "/opt/ora/instantclient_12_2" >> /etc/ld.so.conf.d/oracle.conf
ldconfig
cd $ORACLE_HOME  
ls -lrth libclntsh*   # This will show which version of 'libclntsh' you have... --> needed for following line:

ln -s libclntsh.so.12.1 libclntsh.so

pip install cx_Oracle   # Maybe not needed but I did it anyway (only pip install cx_Oracle without above steps did not work for me...)

Your python scripts are now ready to use 'cx_Oracle'... Enjoy!

Answer 4

Alternatively you can install the cx_Oracle module without the PIP using the following steps

1. Download the source from here https://pypi.python.org/pypi/cx_Oracle [cx_Oracle-6.1.tar.gz ]

2. Extract the tar using the following commands (Linux)

   gunzip cx_Oracle-6.1.tar.gz

   tar -xf cx_Oracle-6.1.tar

3. cd cx_Oracle-6.1

4. Build the module

   python setup.py build

5. Install the module

   python setup.py install

Answer 5

Try to reinstall it with the following code:

!pip install --proxy http://username:windowspwd@10.200.72.2:8080 --upgrade --force-reinstall cx_Oracle