Dungeon Crawl - Map

Alot of the tutorials on the web instruct me on how to create a randomly generated map with varying sized rooms etc. I dont want this, I want a Binding of Isaac style map where each room is the same size and is the only thing on the screen.

Therefore, Im trying to find a way to generate a map where a group of say 8-10 randomly selected rooms out of the room pool are picked and grouped together to create a map.

Ive tried doing this but havent managed to get very far. This is the code that I used to try and make things random

def main():

rooms = []

room = Room1()
rooms.append(room)

room = Room2()
rooms.append(room)

room = Room3()
rooms.append(room)

room = Room4()
rooms.append(room)

current_room_no = random.randint(0, 2)
current_room = rooms[current_room_no]




# Game Logic

player.move(current_room.wall_list)

if player.rect.x < -15:
    if current_room_no == 0:
        current_room_no = random.randint(0, 3)
        current_room = rooms[current_room_no]
        player.rect.x = 790
    elif current_room_no == 3:
        current_room_no = random.randint(0, 3)
        current_room = rooms[current_room_no]
        player.rect.x = 790
    elif current_room_no == 2:
        current_room_no = random.randint(0, 3)
        current_room = rooms[current_room_no]
        player.rect.x = 790
    else:
        current_room_no = 0
        current_room = rooms[current_room_no]
        player.rect.x = 790

if player.rect.x > 801:
    if current_room_no == 0:
        current_room_no = random.randint(0, 3)
        current_room = rooms[current_room_no]
        player.rect.x = 0
    elif current_room_no == 1:
        current_room_no = random.randint(0, 3)
        current_room = rooms[current_room_no]
        player.rect.x = 0
    elif current_room_no == 2:
        current_room_no = random.randint(0, 3)
        current_room = rooms[current_room_no]
        player.rect.x = 0
    else:
        current_room_no = 0
        current_room = rooms[current_room_no]
        player.rect.x = 0

Let me know if any more code is needed!