Run python3.x script on server.
Python3.x will be downloaded inside desired path.
Update symbolic link to the required path by using following command:
ln -s /opt/source folder /user/bin/Destination Folder
.Source Folder- Path where python3.x has downloaded after running shell script of python.
.Destination Folder - Path where python3.x needs to be update to run python globally.
Example: ln -s /opt/py3/Python-3.7.4/python /usr/bin/python3