How to use the aexpect.ShellSession.__init__ function in aexpect

% (ssh_cmd, virsh_exec, self.uri))
        else:  # setting up a local session or re-using a session
            self.virsh_exec = virsh_exec
            if self.uri:
                self.virsh_exec += " -c '%s'" % self.uri
            ssh_cmd = None  # flags not-remote session

        if readonly:
            self.virsh_exec += " -r"

        if unprivileged_user:
            self.virsh_exec = "su - %s -c '%s'" % (unprivileged_user,
                                                   self.virsh_exec)

        # aexpect tries to auto close session because no clients connected yet
        aexpect.ShellSession.__init__(self, self.virsh_exec, a_id,
                                      prompt=prompt, auto_close=auto_close)

        # Handle remote session prompts:
        # 1.remote to remote with ssh
        # 2.local to remote with "virsh -c uri"
        if ssh_remote_auth or self.uri:
            # Handle ssh / password prompts
            remote.handle_prompts(self, self.remote_user, self.remote_pwd,
                                  prompt, debug=True)

        # fail if libvirtd is not running
        if self.cmd_status('list', timeout=60) != 0:
            logging.debug("Persistent virsh session is not responding, "
                          "libvirtd may be dead.")
            self.auto_close = True
            raise aexpect.ShellStatusError(virsh_exec, 'list')

self.virtadmin_exec = ("%s \"%s -c '%s'\""
                                       % (ssh_cmd, virtadmin_exec, self.uri))
            else:
                self.virtadmin_exec = ("%s \"%s\"" % (ssh_cmd, virtadmin_exec))
        else:  # setting up a local session or re-using a session
            self.virtadmin_exec = virtadmin_exec
            if self.uri:
                self.virtadmin_exec += " -c '%s'" % self.uri
            ssh_cmd = None  # flags not-remote session

        if unprivileged_user:
            self.virtadmin_exec = "su - %s -c '%s'" % (unprivileged_user,
                                                       self.virtadmin_exec)

        # aexpect tries to auto close session because no clients connected yet
        aexpect.ShellSession.__init__(self, self.virtadmin_exec, a_id,
                                      prompt=prompt, auto_close=auto_close)

        # Handle remote session prompts:
        # 1.remote to remote with ssh
        # 2.local to remote with "virtadmin -c uri"
        if ssh_remote_auth or self.uri:
            # Handle ssh / password prompts
            remote.handle_prompts(self, self.remote_user, self.remote_pwd,
                                  prompt, debug=True)

        # fail if libvirtd is not running
        if check_libvirtd:
            if self.cmd_status('uri', timeout=60) != 0:
                logging.debug("Persistent virt-admin session is not responding, "
                              "libvirtd may be dead.")
                self.auto_close = True