Python - 根据已处理的验证检查确保客户收到准确的月度发票

Question

我大学的一种 Python 作业。 问题如下：-

一家公司正在寻求建立一个计费系统，以确保其所有客户都能收到基于已处理的验证（或“支票”）的准确月度发票。

您有以下结构的两个表：

| Check type              | Price | Currency |
|-------------------------|-------|----------|
| document_photo          | 0.5   | USD      |
| document_video          | 0.9   | USD      |
| facial_similarity_photo | 0.3   | USD      |
| facial_similarity_video | 0.8   | USD      |
| right_to_work           | 1.25  | USD      |
 
| client   | Check Type              | Result    |
|----------|-------------------------|-----------|
| ABC Bank | facial_similarity_video | pass      |
| ABC Bank | facial_similarity_video | fail      |
| XYCoin   | document_photo          | bad_input |
| XYCoin   | facial_similarity_photo | pass      |
| XYCoin   | document_photo          | pass      |
 

给定以下输入，计算给定供应商的发票。 为了简化问题，您不必关注任何特定时间段：

Input:
pricing = [{"check_type": "document_photo", "price":0.5, "currency":"USD"},
    {"check_type": "document_video", "price":0.9, "currency":"USD"},
    {"check_type": "facial_similarity_photo", "price":0.3, "currency":"USD"},
    {"check_type": "facial_similarity_video", "price":0.8, "currency":"USD"},
    {"check_type": "right_to_work", "price":1.25, "currency":"USD"}]
 
checks = [{"client": "ABC Bank", "check_type": "facial_similarity_video", "result": "pass"},
    {"client": "ABC Bank", "check_type": "facial_similarity_video", "result": "fail"},
    {"client": "XYCoin", "check_type": "document_photo", "result": "bad_input"},
    {"client": "XYCoin", "check_type": "facial_similarity_photo", "result": "pass"},
    {"client": "XYCoin", "check_type": "document_photo", "result": "pass"}]    


  Test cases:     
    calculate_invoice("ABC Bank") == 1.6    
    calculate_invoice("XYCoin") == 0.8 

我试过在下面这样做：-

counts = [pricing, checks]
calculate_invoice = 0

for key in set(pricing).intersection(set(checks)):
    for i in counts:
        if i[key] == 'pass':
            calculate_invoice += i[key].get('price')
            

print(calculate_invoice)

但是我在下面收到了这个错误：

Traceback (most recent call last): 
    File "main.py", line 17, in for key in set(pricing).intersection(set(checks)): 
TypeError: unhashable type: 'dict'