Visual Studio Code Pylint AutoFix Not Showing Up On Ubuntu 17.04

I set up a python project in visual studio code and this is the debugging option I'm using in my launch.json:

  {
            "name": "External Terminal/Console",
            "type": "python",
            "request": "launch",
            "stopOnEntry": false,
            "pythonPath": "${config:python.pythonPath}",
            "program": "${file}",
            "cwd": "",
            "console": "externalTerminal",
            "env": {},
            "envFile": "${workspaceRoot}/.env",
            "debugOptions": [
                "WaitOnAbnormalExit",
                "WaitOnNormalExit"
            ]
        }

I installed pylint and created a settings.json file which looks exactly like this:

{
 "python.linting.pep8Enabled": true,
 "python.linting.pep8Path": "/usr/bin/pep8",
 "python.linting.pylintPath": "/usr/bin/pylint"
}

The pylint linter errors are being displayed but there is no lightbubble showing up which helps fixing linter errors automatically.

What is causing this and how can I enable the lightbubble which helps me to fix the linter errors e.g. Fix all autofixable errors.?