Matching case sensitive unicode strings with regular expressions in Python

Question

Suppose I want to match a lowercase letter followed by an uppercase letter, I could do something like

re.compile(r"[a-z][A-Z]")

Now I want to do the same thing for unicode strings, i.e. match something like 'aÅ' or 'yÜ'.

Tried

re.compile(r"[a-z][A-Z]", re.UNICODE)

but that does not work.

Any clues?