ImportError: No module named 'cx_Oracle'问题处理过程记录，安装python cx_Oracle库

错误如下：

E:\pargram>python
Python 3.5.2 |Anaconda 4.2.0 (64-bit)| (default, Jul  5 2016, 11:41:13) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>> import cx_Oracle

Traceback (most recent call last):  File "", line 1, in 

ImportError: No module named 'cx_Oracle'

执行过

　　pip install cx_Oracle

也试过离线包

E:\pargram>pip install cx_Oracle-7.1.3-cp35-cp35m-win_amd64.whl
Processing e:\pargram\cx_oracle-7.1.3-cp35-cp35m-win_amd64.whl
Installing collected packages: cx-Oracle
Successfully installed cx-Oracle-7.1.3

还是报错。

最后只能选择
安装cx_Oracle-7.1.3.tar.gz
执行python setup.py install
报错如下：

cxoModule.obj : warning LNK4197: export 'PyInit_cx_Oracle' specified multiple times; 

using first specification   Creating library build\temp.win-amd64-3.5\Release\src\cx_Oracle.cp35-win_amd64.lib 

and object build\temp.win-amd64-3.5

\Release\src\cx_Oracle.cp35-win_amd64.expGenerating codeFinished generating code

LINK : fatal error LNK1158: cannot run 'rc.exe'

error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 14.0\\VC\\BIN\\x86_amd64

\\link.exe' failed with exit status 1158

解决办法：
把目录C:\Program Files (x86)\Windows Kits\8.1\bin\x86目录下rc.exe(还是不行加上rcdll.dll)
拷贝到C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin目录下。
在执行python setup.py install后可以了。

可是import cx_Oracle

D:\>pythonPython 3.5.2 |Anaconda 4.2.0 (64-bit)| (default, Jul  5 2016, 11:41:13)

 [MSC v.1900 64 bit (AMD64)] on win32Type "help", "copyright", "credits" or "license" for 

more information.

>>> import cx_Oracle

但是

>>> conn=cx_Oracle.connect('scott/[email protected]:1521/orcl')

Traceback (most recent call last):  File "", line 1, in cx_Oracle.DatabaseError: 

Error while trying to retrieve text for error ORA-01804
>>>

发现应该是Oracle client问题。

安装了oracle11g client终于成功了

简单验证：

E:\>python

Python 3.5.2 |Anaconda 4.2.0 (64-bit)| (default, Jul  5 2016, 11:41:13) [MSC v.1900 64 bit (AMD64)] on win32

Type "help", "copyright", "credits" or "license" for more information.

>>> import cx_Oracle

>>> conn=cx_Oracle.connect('scott/[email protected]:1521/orcl')

>>> curs=conn.cursor()

>>> sql='select * from dept'

>>> curs.execute (sql)

>>> row=curs.fetchone()

>>> print(row[0])

10

>>> print(row[1])

ACCOUNTING

>>> curs.close()

>>> conn.close()