Environment data

VS Code version: 1.19.0-insider
Python Extension version: 0.8.0
Python Version: 2.7.12, 3.5.2, 3.6.3
OS and version: Ubuntu 16.04

Actual behavior

As I mention above, I have three python version installed on my computer, but the only python that shows up when running command python: select interpreter is python 2.7.12. See picture bellow.
Extension also will only list python 2.7.12 + the one that I already set on workspace configuration file (manually).

Expected behavior

It should list all three python version, including those that running on virtual environment