python - Ansible - 按最后一个参数(IP 地址)对命令列表进行排序

Question

我有一个要发送到 Juniper 路由器的命令列表。如何按命令末尾的 IP 地址对列表进行排序？

由此，使用 set_fact 和 with_items 生成

"command_list": [
    "show bgp neighbor 1.1.1.1",
    "show bgp neighbor 2.2.2.2",
    "show bgp neighbor 3.3.3.3",
    "show route receive-protocol bgp 1.1.1.1",
    "show route receive-protocol bgp 2.2.2.2",
    "show route receive-protocol bgp 3.3.3.3",
    "show route advertising-protocol bgp 1.1.1.1",
    "show route advertising-protocol bgp 2.2.2.2"
    "show route advertising-protocol bgp 3.3.3.3"
]

为此，按目标IP排序。

"command_list": [
    "show bgp neighbor 1.1.1.1",
    "show route receive-protocol bgp 1.1.1.1",
    "show route advertising-protocol bgp 1.1.1.1",
    "show bgp neighbor 2.2.2.2",
    "show route receive-protocol bgp 2.2.2.2",
    "show route advertising-protocol bgp 2.2.2.2"
    "show bgp neighbor 3.3.3.3",   
    "show route receive-protocol bgp 3.3.3.3",        
    "show route advertising-protocol bgp 3.3.3.3"
]

Answer 1

在list上使用sorted操作，并利用其key参数来指定在创建之前对每个列表元素调用的函数比较。

command_list = [
    "show bgp neighbor 1.1.1.1",
    "show bgp neighbor 2.2.2.2",
    "show bgp neighbor 3.3.3.3",
    "show route receive-protocol bgp 1.1.1.1",
    "show route receive-protocol bgp 2.2.2.2",
    "show route receive-protocol bgp 3.3.3.3",
    "show route advertising-protocol bgp 1.1.1.1",
    "show route advertising-protocol bgp 2.2.2.2",
    "show route advertising-protocol bgp 3.3.3.3"
]
def last(a):
    for i in reversed(a.split()):
        return i
print(sorted(command_list, key=last))

输出:

 ['show bgp neighbor 1.1.1.1',
 'show route receive-protocol bgp 1.1.1.1',
 'show route advertising-protocol bgp 1.1.1.1',
 'show bgp neighbor 2.2.2.2', 
 'show route receive-protocol bgp 2.2.2.2', 
 'show route advertising-protocol bgp 2.2.2.2',
 'show bgp neighbor 3.3.3.3',
 'show route receive-protocol bgp 3.3.3.3',
 'show route advertising-protocol bgp 3.3.3.3']