IDNA resolving is wrong

I own the Domain `κλαρα-σωλις.ευ`, i tried converting the domain via the encode method of string, it results in a wrong A-Label Form of my Domain.

```py
>>> domain = u"κλαρα-σωλις.ευ"
>>> domain.encode("idna")
b'xn----ylba7abgd9buc7d.xn--qxa6a'
```
My Browser and EURID the EU-Registrar converts `κλαρα-σωλις.ευ` to `xn----ylba7abgd9bnh0e.xn--qxa6a`.