cx_oracle is installed still python gives an impor

问题:

I have been having a hard time with this. I have the cx_oracle file installed:cx_Oracle-5.3-12c.win-amd64-py3.6-2 Earlier I had Python 3.6.4 and this cx_oracle file was not getting installed,Then I removed that version of python installed python 3.6 and then the cx_oracle file got installed successfully. But now that I am trying to import cx_oracle from python it is not working. Why? I am using Windows 10. All my python executables and cx_oracle and oracle11g files are on the disk partition E:.