Getting AttributeError: 'list' object has no attribute 'split' on my python project

import constants
import copy


teams = copy.deepcopy(constants.TEAMS)
players= copy.deepcopy(constants.PLAYERS)

team1 = []
team2 = []
team3 = []
experienced = []
not_experienced = []
#amount of experienced and non experienced players
amt_exp = int(len(not_experienced) / len(teams))
amt_non_exp = int(len(experienced) / len(teams))


def clean_data():            
    for player_stats in players:
        if player_stats['experience'] == 'YES':
            player_stats['experience'] = True
        else:
            player_stats['experience'] = False
        player_stats['guardians'] = player_stats['guardians'].split(" and ")
        player_stats['height'] = int(player_stats['height'][:2])
    for player in players:
        if player['experience'] == True:
            experienced.append(player)
        else:
            not_experienced.append(player)



def sort_exp(team):
    exp_count = 0
    while exp_count < amt_exp and experienced != 0:
        exp_count += 1
        team.insert(0, experienced.pop(0))

def sort_not_exp(team):
    n_exp_count = 0
    while n_exp_count < amt_non_exp and experienced != 0:
        n_exp_count += 1
        team.append(not_experienced.pop(0))
def dict_team(team):
    index = 1
    team_dict = {}
    for players in team:
        team_dict[index] = players
        index += 1
    return team_dict


def display_team(option):
    clean_data()
    sort_exp(team1)
    sort_exp(team2)
    sort_exp(team3)
    sort_not_exp(team1)
    sort_not_exp(team2)
    sort_not_exp(team3)
    team_dict1 = dict_team(team1)
    team_dict2 = dict_team(team2)
    team_dict3 = dict_team(team3)
    if option == 1:
        print_name(team_dict1)


#player_guardians =[]
#player_guardians.append(player['guardians'])
def print_name(team):
    player_names = []

    for player in team:
        player_names.append(player['name'])

    player_names = ", ".join(player_names)
    print(player_names)