访问两个不同的嵌套字典的键和值并计算值

Question

我是python的新手，我正在尝试检查每个用户的两个不同嵌套字典的书是否相同；如果相同，每本书的旧用户评分将乘以每本书的新用户评分，相应地对应于每本书。然后，我要添加为每个老用户乘以的所有图书评分。

这就是我想要做的：

books = ['book1', 'book2', 'book3','book4','book5','book6','book7','book8','book9','book10']

names = ['anas', 'jana', 'mo', 'farhan']

biglist = [{'anas':{'book1':0,'book2':-2,'book3':3,'book4':3,'book5':3,'book6':5,'book7':4,'book8':0,'book9':2,'book10':2}}, 

            {'jana':{'book1': 0,'book2':3,'book3':-3,'book4':2,'book5':4,'book6':0,'book7':-5,'book8':2,'book9':0,'book10':-3}}, 

            {'mo':{'book1': 0,'book2': 5,'book3': 3,'book4':3,'book5':3,'book6':2,'book7':2,'book8':3,'book9':5,'book10':-1}},

            {'farhan':{'book1':2,'book2':4,'book3':0,'book4':0,'book5':1,'book6':-5,'book7':0,'book8':1,'book9':-3,'book10':-2}}]

new_ratings = []
global new_name_list
new_name_list = []

shuffle = random.sample(books,3)

small_list = []

#THE USER IS GOING TO RATE 3 BOOKS
global z 
z = {}

def cool():
    global new_name
    new_name = input("name ")

    new_name_list.append(new_name)

    for i in range(3):

        books_buff = books[:]

        x = shuffle[i]

        print(x)

        user_rating = int(input(""))

        if user_rating != 0 and x in books_buff:

            books.remove(x)

        new_ratings.append(user_rating)

    global smalldict 

    smalldict = dict(zip(shuffle,new_ratings))

    z[new_name] = smalldict

    small_list.append(z)
    print(small_list)



def multi():
    result=[]

    for l in small_list:
        # print(l)
        for k, v in l.items():
            global k2
            global v2
            for k2 , v2 in v.items():
                # print(k2,v2)
                print(k2, v2)   



    for list_item in biglist: 
        # print(list_item)
        for key, value in list_item.items(): 
            global key2
            global value2
            for key2, value2 in value.items():
                # print(key2,value2)
                pass


    if k2 in v.items() == key2 in value.items():
        print(k2)
        for ratings1, ratings2 in zip(v2,value2):
            result.append(ratings1*ratings2)
    print(result)

但是作为输出，我得到了一个空字典。

例如，如果新用户对这三本书的评分如下：

book1 
1
book2 
3
book9
-5

我将其作为所需的输出：

{'anas':{'book1':0,'book2':-6,'book9':-10}} 
{'jana':{'book1':0,'book2':9,'book9':0}}      
{'mo':{'book1':0,'book2':15,'book9':-25}}    
{'farhan':{'book1':2,'book2':12,'book9':15}}  
[-16,9,-10,29]