Trying to install cx_Oracle for Python 3.4 on Centos. I have installed Oracle client 11.2.0.1 (actually has two copies, as one requires encrypted connection while the other doesn't, so I have /usr/lib/oracle/11.2/client64 and /usr/lib/oracle/11.2.99/client64)
$ echo $ORACLE_HOME
/usr/lib/oracle/11.2/client64
$ python3.4 --version
Python 3.4.3
I have the SDK installed:
$ ls -all $ORACLE_HOME/sdk/include
total 1640
drwxrwxr-x 2 root root 4096 Aug 15 2009 .
drwxrwxr-x 4 root root 4096 Aug 15 2009 ..
-r-xr-xr-x 1 root root 42534 Aug 15 2009 ldap.h
-r--r--r-- 1 root root 34157 Aug 15 2009 nzerror.h
-r--r--r-- 1 root root 74787 Aug 15 2009 nzt.h
-r--r--r-- 1 root root 11586 Aug 15 2009 occiAQ.h
-r--r--r-- 1 root root 34750 Aug 15 2009 occiCommon.h
-r--r--r-- 1 root root 70685 Aug 15 2009 occiControl.h
-r--r--r-- 1 root root 39751 Aug 15 2009 occiData.h
-r--r--r-- 1 root root 2115 Aug 15 2009 occi.h
-r--r--r-- 1 root root 24778 Aug 15 2009 occiObjects.h
-r-xr-xr-x 1 root root 7203 Aug 15 2009 oci1.h
-r--r--r-- 1 root root 10361 Aug 15 2009 oci8dp.h
-r--r--r-- 1 root root 431290 Aug 15 2009 ociap.h
-r-xr-xr-x 1 root root 6204 Aug 15 2009 ociapr.h
-r--r--r-- 1 root root 43001 Aug 15 2009 ocidef.h
-r-xr-xr-x 1 root root 4048 Aug 15 2009 ocidem.h
-r--r--r-- 1 root root 11339 Aug 15 2009 ocidfn.h
-r--r--r-- 1 root root 8953 Aug 15 2009 ociextp.h
-r--r--r-- 1 root root 170958 Aug 15 2009 oci.h
-r-xr-xr-x 1 root root 6494 Aug 15 2009 ocikpr.h
-r--r--r-- 1 root root 4670 Aug 15 2009 ocixmldb.h
-r--r--r-- 1 root root 94528 Aug 15 2009 ocixstream.h
-r--r--r-- 1 root root 23266 Aug 15 2009 odci.h
-r-xr-xr-x 1 root root 6540 Aug 15 2009 oratypes.h
-r--r--r-- 1 root root 15083 Aug 15 2009 orid.h
-r--r--r-- 1 root root 102775 Aug 15 2009 ori.h
-r--r--r-- 1 root root 157901 Aug 15 2009 orl.h
-r--r--r-- 1 root root 42626 Aug 15 2009 oro.h
-r--r--r-- 1 root root 116645 Aug 15 2009 ort.h
-r-xr-xr-x 1 root root 9892 Aug 15 2009 xa.h
I also have python-devel installed:
$ sudo yum install python34u-devel
Loaded plugins: security
Setting up Install Process
Package python34u-devel-3.4.3-2.ius.centos6.x86_64 already installed and latest version
Nothing to do
Still, the installation fails:
$ sudo pip3.4 install cx_oracle
Collecting cx-oracle
Using cached cx_Oracle-5.2.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 20, in <module>
File "/tmp/pip-build-zo2vjgvs/cx-oracle/setup.py", line 201, in <module>
includeDirs = FindInstantClientRPMInclude(instantClientRPMLib)
File "/tmp/pip-build-zo2vjgvs/cx-oracle/setup.py", line 144, in FindInstantClientRPMInclude
raise DistutilsSetupError("cannot locate Oracle Instant Client " \
distutils.errors.DistutilsSetupError: cannot locate Oracle Instant Client SDK RPM header files
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-zo2vjgvs/cx-oracle
Well, after lot of trial and errors it turns out the problem was that I had these two Oracle client libraries I used to separate an "encryption required" and "encryption not required" client. As soon as I removed the second one, the cx_Oracle installed just worked.
/usr/lib/oracle/11.2/client64
/usr/lib/oracle/11.2.99/client64
It is a shame, that Oracle doesn't have a way to set encryption PER CONNECTION, only can be set for the whole client, so I need two clients if I want to connection sometimes on an encrypted way and sometimes with no encryption.
来源：https://stackoverflow.com/questions/31435990/cx-oracle-distutils-errors-distutilssetuperror-cannot-locate-oracle-include-fi