Choosing Python3 interpreter gives no Intellisense

[nikivdev]

Environment data

VS Code version: 1.20.1
Python Extension version: 2018.1.0
Python Version: 3.7.0b1
OS and version: 10.11.6

Actual behavior

I try to use any of Python 3 interpreters from this list:

And I get no Intellisense, no autocompletion, nothing.

Expected behavior

I get autocomplete and everything works. If I switch to 2.6.9 interpreter, everything starts working.

[DonJayamanne]

You haven't provided all the information requested when you created the issue.
Please do provide the missing information, without that it becomes almost possible to help.

Logs

Output from Python output panel

Output from Console window (Help->Developer Tools menu)

[nikivdev]

Output from Python output panel

##########Linting Output - pylint##########
No config file found, using default configuration

Output from Console window (Help->Developer Tools menu)

Can't find this.

[DonJayamanne]

Sorry, your trying to use 3.7 beta.
That isn't supported yet.
Please use Python 3.6