Please, do you know of a Python library which provides mutable strings? Google returned surprisingly few results. The only usable library I found is http://code.google.com/p/gapbuffer/ which is in C but I would prefer it to be written in pure Python.
Edit: Thanks for the responses but I'm after an efficient library. That is, ''.join(list)
might work but I was hoping for something more optimized. Also, it has to support the usual stuff regular strings do, like regex and unicode.