访问字典组件中列表的元素

# 定义一个包含列表的字典
data = {
    "users": [
        {"name": "Alice", "age": 25},
        {"name": "Bob", "age": 30},
        {"name": "Charlie", "age": 35}
    ]
}

# 访问字典中列表的元素
first_user_name = data["users"][0]["name"]
print(first_user_name)  # 输出: Alice

user_name = data.get("users", [{}])[0].get("name", "Default Name")
print(user_name)  # 如果键不存在，输出: Default Name

if len(data["users"]) > 0:
    first_user_name = data["users"][0]["name"]
else:
    first_user_name = "No users found"
print(first_user_name)

try:
    first_user_name = data["users"][0]["name"]
except (KeyError, IndexError, TypeError) as e:
    first_user_name = "Error accessing data"
print(first_user_name)