Pexpect 2.4 is only available at Pypi. Both the homepage of pexpect(http://www.noah.org/wiki/Pexpect) and download page (http://sourceforge.net/projects/pexpect/files/) are outdated. The repository on Github (http://github.com/noahspurrier/pexpect/) has been removed.
I ever contacted the author(n...@noah.org) but no response till now. I'm going to fork pexpect on Github and add some features... -- http://mail.python.org/mailman/listinfo/python-list