linux系统安装了python中，但是为什么执行有问题

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<br>执行python命令  报错如下：nohup python -u py_write_excel.py >>nouhp2.out 2>&1 &<br><br>[analyse@host-192-168-1-24 batch]$ more nouhp2.out Traceback (most recent call last):   File "py_write_excel.py", line 5, in <module>     import cx_Oracle ImportError: No module named cx_Oracle Traceback (most recent call last):   File "py_write_excel.py", line 5, in <module>     import cx_Oracle ImportError: No module named cx_Oracle nohup: ignoring input Traceback (most recent call last):   File "py_write_excel.py", line 5, in <module>     import cx_Oracle ImportError: No module named cx_Oracle

　　

原因是python，命令  是默认用的python2，python2中默认是没有

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1	cx_Oracle这个模块的，，如果改成python3就可以执行了。因为python3中内置

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1	cx_Oracle这个模块