Python 3.x Python字典列表连接列表com

Python字典列表，如何打印其产品类别及其格式为“产品类别-产品描述”的产品描述，如：产品类别-产品描述，其中中止==1

对于格式，使用

join

，如

print（'-'.join（str1））

---

但是我不知道如何链接它们。

您可以通过一个简单的列表（使用

if

子句解释

中断的
），然后对列表中的每个元素执行
连接，如下所示：

products = [
    {
        "discontinued": 0,
        "lead_time_days": 4,
        "product_category": "Toy",
        "product_description": "Pull out a bock without crashing the stack ...",
        "product_id": 101,
        "product_name": "Jenga Classic Game",
        "reorder_level": 50,
        "unit_price": 14.99
    },
    {
        "discontinued": 0,
        "lead_time_days": 4,
        "product_category": "Wireless Phone Accessory",
        "product_description": "Display: 2.5 inches Camera: 2 MP Talk Time: 4.5 hours Weight: 3.3 ounces",
        "product_id": 102,
        "product_name": "AT&T Z431 GoPhone (AT&T)",
        "reorder_level": 14,
        "unit_price": 49.99
    },
    {
        "discontinued": 1,
        "lead_time_days": 4,
        "product_category": "Wireless Phone Accessory",
        "product_description": "Display: 4.5-inches Camera: 5-MP Input: Touchscreen OS: Android",
        "product_id": 103,
        "product_name": "AT&T Z998 LTE Android Go Phone (AT&T Prepaid)",
        "reorder_level": 29,
        "unit_price": 159.99
    },
    {
        "discontinued": 1,
        "lead_time_days": 4,
        "product_category": "Personal Computers",
        "product_description": "8 inch Display (1920x1200) ...",
        "product_id": 104,
        "product_name": "NVIDIA SHIELD Tablet (WiFi)",
        "reorder_level": 10,
        "unit_price": 299.0
    }
]

@如果答案对您有帮助，请将其标记为“已接受”（带有绿色的小“v”标志）。这样，其他人就会知道问题得到了回答。
print_messages = [' - '.join([product['product_name'], product['product_description']]) 
                  for product in products if product['discontinued']]

for message in print_messages:
    print(message)