打印列表中实例的属性，仅当该属性存在时

# 示例列表，包含多个实例
instances = [
    {"id": 1, "name": "Instance 1", "status": "running"},
    {"id": 2, "name": "Instance 2", "status": "stopped"},
    {"id": 3, "name": "Instance 3"}
]

# 遍历每个实例
for instance in instances:
    # 检查属性是否存在
    if "status" in instance:
        # 打印属性的值
        print("Instance ID:", instance["id"])
        print("Instance Name:", instance["name"])
        print("Instance Status:", instance["status"])
        print()