Question

我似乎遇到了代码或概念，在使用Python渲染Jinja2模板时需要一些帮助来迭代基于YAML的dict / list。我在编程方面有点新（3周），所以要提前为任何错误道歉。

例如，我在YAML中定义了以下字典。

---
- hostname: R1
  interfaces:
    - name: f0/0
      description: This is FastEth 0/0 connected to R2 FastEth 0/0
    - name: f0/1
      description: This is FastEth 0/1 connected to Local Host Loopback
- hostname: R2
  interfaces:
    - name: f0/0
      description: This is FastEth 0/0 connected to R2 FastEth 0/0
    - name: f0/1
      description: This is FastEth 0/1 connected to Local Host Loopback

以下是我正在呈现的Jinja模板：

{% for iface in config.interfaces %}
int {{ config.name }}
description {{ config.description }}
{% endfor %}

.... 我有两个路由器R1和R2，我只想根据它们的字典发送渲染的配置。我想生成两个配置集，每个路由器一个。因此，我认为这样做是Python，但没有运气。

env = Environment(loader=FileSystemLoader('./templates'),trim_blocks=True)
with open('./YAML/configuration.yml') as _:
    config_commands_var = yaml.load(_)

for device in range(len(devices)):
    print "\nStart time: " + str(datetime.now())
    username = devices[device]['username']
    password = devices[device]['password']
    ip = devices[device]['ip']
    device_type = devices[device]['device_type']
    secret = devices[device]['secret']
    hostname = devices[device]['hostname']

    config_commands = template.render(config=config_commands_var)
    push_config_commands(username, password, ip, device_type, secret, config_commands)

这里＆＃34;设备＆＃34;是一个设备词典列表。和＆＃34; push_config_commands＆＃34;函数立即向任何设备发送命令列表。

我希望能在这里真正解决我的问题，所以会感激任何帮助。提前谢谢。

Answer 1

我想我已经开始工作了。但是仍然欢迎任何建议。

将YAML文件更改为：

<button class="btn btn-warning" ng-click="postToDatabase(dataXYZ)">Send to Databse</button>

我将模板更改为：

---
interfaces:
  R1:
    f0/0:
      description: This is FastEth 0/0 connected to R2 FastEth 0/0
    f0/1:
      description: This is FastEth 0/1 connected to Local Host Loopback
  R2:
    f0/0:
      description: This is FastEth 0/0 connected to R2 FastEth 0/0
    f0/1:
      description: This is FastEth 0/1 connected to Local Host Loopback

在渲染时我传递了键来查看：

{% for iface in config %}
interface {{ iface }}
description {{ config[iface]['description'] }}
{% endfor %}

任何改进都受到欢迎。

感谢。

如何在Python中使用Jinja2模板迭代YAML列表/字典项目

1 个答案: