title: Python regex matching Unicode properties
body: <p>Perl and some other current regex engines support Unicode properties, such as the category, in a regex. E.g. in Perl you can use <code>\p{Ll}</code> to match an arbitrary lower-case letter, or <code>p{Zs}</code> for any space separator. I don't see support for this in either the 2.x nor 3.x lines of Python (with due regrets). Is anybody aware of a good strategy to get a similar effect? Homegrown solutions are welcome.</p>