Random List Generation not working

I am working on a game where I need to randomly generate classes for a list. I use a self-made function randList to do this. The code for that function looks like this:

def randList(options, num): #RANDOMLY SELECTS NUM ITEMS FROM LIST OPTIONS
returnVal = [] #CREATE A LIST THAT IT RETURNS
for i in range(num - 1): #FOR DESIRED NUMBER OF RETURN ITEMS
    val = r.choice(options) #RANDOMLY SELECT ITEM FROM OPTIONS
    returnVal.append(val) #ADD THAT TO RETURNVAL
    options.remove(val) #REMOVE IT FROM OPTIONS.
return returnVal #RETURN GENERATED LIST

I am using that to randomly generate monsters and items in a room like so:

class roomParent: #ROOM CHARACTER FINDS
    def __init__(self, entities, floor): #INIT WITH ENEMIES IN ROOM, ITEMS ON FLOOR
        self.entities = entities #ENEMIES THERE ARE
        self.floor = floor #ON FLOOR THERE IS
    def generate(self):
        global enemiesBeat
        if enemiesBeat >= 500:
            self.entities = [dragon]
        else:
            self.entities = randList([goblin, dwarf, slime, naga, troll, beholder], 1)
        self.floor = randList([scrap, scrap, scrap, fireJar, ambrosia, sword, spearhead, armor, potion, slimeball], r.randint(0, 3))

room = roomParent([], [])

Just so you know, goblin, dwarf, slimeball, etc. are defined earlier in the code. I don't think they have anything to do with the problem. I generate the room later like this:

def main():
    room.generate()
    print("Enemies: " + str(room.entities))
main()

I want it to print out a list with two random monsters in it from room.generate(), but it always prints Enemies: []. There are no errors in the code, and after trying to troubleshoot for 10 minutes, I decided to consult he web with no fruits in result of that labor. Thank you in advance for any help you give.