January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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数据格式与数据模型
｜
131
interface GigabitEthernet0/0
ip address 192.168.0.1 255.255.255.0
interface GigabitEthernet0/1
ip address 172.16.31.1 255.255.255.0
interface GigabitEthernet0/2
ip address 10.3.2.1 255.255.254.0
如你所见，可以使用
XSLT
生成网络配置。但是必须承认，它确实有点儿麻烦。你可能会
发现
Jinja
是一种更适用于创建网络配置的模板语言
，它拥有许多有助于网络自动化的特
性。第
6
章会介绍
Jinja
。
5.3.4
使用
XQuery
搜索
XML
上一节提到了在
XSLT
文档中使用
XPath
来具体定位
XML
文档中的特定节点。但是，如
果要执行更高级的查找，那么需要的就不止是简单的坐标系统了。
XQuery
利用
XPath
之类的工具从
XML
文档中查找和提取数据
。如果你正在使用
Python
访问路由器或交换机的
RESTful
API
，则可能需要再额外编写一些代码才能得到所需那部
分
XML
输出
。或者，可以对接收到的数据立即使用
XQuery
，仅显示与
Python
程序相关
的数据。
XQuery
是一个功能强大的工具
，几乎就像是一种编程语言。有关
XQuery
的更多信息，可
以参见
W3C
规范。
5.4
JSON
到目前为止，本章已经讨论过
YAML
，这是一种非常适合于人类交互的工具，可以轻松导
入到常见的编程语言数据结构中。我们还讨论了 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.