PEP8 compliance required. Indentation is four spaces. Install SublimeLinter and drop these exceptions to PEP8 in `SublimeLinter.sublime-settings` (Sublime Text -> Preferences -> Package Settings -> SublimeLinter -> Settings - User):

```json
{
    "pep8_ignore":
    [
        "E501",
        "E128",
        "E123",
        "E124"
    ]
}
```