I get 'TypeError: 'float' object is not iterable, could someone help me please?

import os
import random

CELLS =[(0,0),(1,0),(2.0),(3.0),(4.0),
        (0,1),(1,1),(2.1),(3.1),(4.1),
        (0,2),(1,2),(2.2),(3.2),(4.2),
        (0,3),(1,3),(2.3),(3.3),(4.3),
        (0,4),(1,4),(2.4),(3.4),(4.4)]

def clear_screen():
    os.system("cls" if os.name =="nt" else "clear")

def get_positions():
    return random.sample(CELLS,3)


    return player, door, monster


player, door, monster = get_positions()


def move_player(player, move):
    x, y = player
    if move == "LEFT":
        x -= 1
    if move == "RIGHT":
        x += 1
    if move == "UP":
        y -= 1
    if move == "DOWN":
        y += 1
    return x, y

def get_moves(player):

    moves = ["LEFT","RIGHT","UP","DOWN"]
    x, y = player
    if x == 0:
        moves.remove("LEFT")
    if x == 4:
        moves.remove("RIGHT")
    if y == 0:
        moves.remove("UP")
    if y == 4:
        moves.remove("DOWN")
    return moves



while True:
    valid_moves = get_moves(player)
    clear_screen()
    print("Welcome to the Dungeon!")
    print("You are now in the {} room".format(player))
    print("You can move to {}".format(", ".join(valid_moves)))
    print("To quit type QUIT")

    move = input("> ")
    move = move.upper()

    if move == "QUIT":
        break
    if moves in valid_moves:
        player = move_player(player, move)
    else:
        print("\n You hit a wall!")
        continue