I am pretty sure that even in France, getting caught with possession of <1g of cannabis while nowhere near a vehicle won't be very likely to get you detained, fined 1000s of EUR-equivalent and having your drivers license restricted pending you showing up for regular urine samples.

This is roughly what you should expect if you get busted carrying one joint in Sweden.

Source: Some people around my social circle smoked back in uni.

Well, this is not that extreme indeed. Is what you are writing a true expectation, or rather an extreme case?

Let's say it's probably a more likely outcome than a police officer on patrol wiffing a smell looking the other way.

Aside: I'm curious what these numbers would be for other European countries:

https://news.ycombinator.com/item?id=37758402

> Sweden has about 8600 people in prison so about 37% of their prison population is in there for "drug offenses"

It's true. Took 18months fighting to get drivers license back.

Source: it happened to me.