Why is requests module not found in pyev eclipse but available from command line

Question

pydev is looking inside the below path for module name requests and not able to find:

[msingh@centos eric6-19.04]$ ls /opt/rh
devtoolset-4  devtoolset-7  rh-java-common  rh-python36
[msingh@centos eric6-19.04]$ ls /opt/rh/rh-python36
enable  root
[msingh@centos eric6-19.04]$ 

but the same module is found on command-line when trying to install :

[msingh@centos safaribooks]$ sudo pip3.6 install requests
[sudo] password for msingh: 
Requirement already satisfied: requests in /usr/lib/python3.6/site-packages (2.19.1)
Requirement already satisfied: chardet<3.1.0,>=3.0.2 in /usr/lib/python3.6/site-packages (from requests) (3.0.4)
Requirement already satisfied: urllib3<1.24,>=1.21.1 in /usr/lib/python3.6/site-packages (from requests) (1.23)
Requirement already satisfied: certifi>=2017.4.17 in /usr/lib/python3.6/site-packages (from requests) (2018.4.16)
Requirement already satisfied: idna<2.8,>=2.5 in /usr/lib/python3.6/site-packages (from requests) (2.7)