German Doors

I'm going to see assume most of Europe has the same doors, but for the moment I can only confirm German. I don't understand how to tell if the doors are in or out doors without getting up close and looking at them. Most of the time I just go for the quick push, if that doesn't work I go for the quick pull. If that doesn't work I assume I'm retarded and that the whole city of Kassel is laughing at me, and I walk away.

So if you see a dumb American trying to open doors in Germany, it's probably me.