I don't know the law on this but I have the feeling that no-one can complain if you have guests staying with you in the flat you rent.
However, by implication at least, there's a slight difference between 'ten days' and 'a week or two', which can easily mean three weeks!
Especially if the house is usually very quiet and if you can communicate with your (Swiss) neighbours, I would suggest you tell them, without making any big deal about it, that you are expecting guests so there will be slightly more coming and going than usual. Then it is quite clear from the start that the folk are not moving in with you and that any extra noise etc. is only temporary.
Hope you have a great time.