django报错：multivaluedictkeyerror

代码

def save_player_data(request):
    if request.method == 'POST':
        requestBody = request.body
        print(requestBody)
        player_username = request.POST['player_username']
        player_health = request.POST['player_health']
        player_score = request.POST['player_score']
        print(player_username, player_health, player_score)
    return HttpResponse(None)

找了好久，最后居然是前端发送过来的数据名写错了。
player_username 写成了palyer_username。所以
一定要仔细检查这里的前后端的键值是否一致。