Parse each returned registry value.

def Parse(self, stat, knowledge_base):
    """Parse each returned registry value."""
    _ = knowledge_base  # Unused.
    sid_str = stat.pathspec.Dirname().Basename()

    if SID_RE.match(sid_str):
      kb_user = rdf_client.User()
      kb_user.sid = sid_str
      if stat.pathspec.Basename() == "ProfileImagePath":
        if stat.resident:
          # Support old clients.
          kb_user.homedir = utils.SmartUnicode(stat.resident)
        else:
          kb_user.homedir = stat.registry_data.GetValue()

        kb_user.userprofile = kb_user.homedir
        try:
          # Assume username is the last component of the path. This is not
          # robust, but other user artifacts will override it if there is a
          # better match.
          kb_user.username = kb_user.homedir.rsplit("\\", 1)[-1]
        except IndexError:
          pass

      yield kb_user