Advice on regexp - Non word characters

[ssimop]

I am sorry, but I am in need to ask again question on regexp. I am afraid I am still studying and learning this issue. The question : I need to replace non word characters. I failed using \w in that it cannot detect unicode characters in greek character set. Therefore, I by-passed this problem using the following expression :

st.replacerx("\d|\,|\.|\\|\: |\(|\)|\_|\%|\$" " ")

I wonder whether there exists a simpler way to do it. Many thanks in advance.