python yaml更新保留顺序和注释 [英] python yaml update preserving order and comments

问题描述

我正在使用 python 在 Yaml 中插入一个密钥，但我想保留 yaml 中的顺序和注释

Im inserting a key into Yaml using python but I would like to preserve order and comments in the yaml

#This Key is used for identifying Parent tests
    ParentTest:
       test:
         JOb1: myjob
         name: testjob
         arrive: yes

现在我使用下面的代码插入新密钥

Now Im using below code to insert new key

params['ParentTest']['test']['new_key']='new value'
yaml_output=yaml.dump(pipeline_params, default_flow_style=False)

如何保留准确的顺序和注释?

How to preserve the exact order and comments ?

下面到达移动了但我想保留订单&还有评论

Below arrive moved up but I want to preserve order & comments as well

输出是:

 ParentTest:
       test:
         arrive: yes
         JOb1: myjob
         name: testjob

推荐答案

pyyaml 不能保留评论，但是 ruamel 确实如此.

pyyaml cannot keep comments, but ruamel does.

试试这个:

doc = ruamel.yaml.load(yaml, Loader=ruamel.yaml.RoundTripLoader)
doc['ParentTest']['test']['new_key'] = 'new value'
print ruamel.yaml.dump(doc, Dumper=ruamel.yaml.RoundTripDumper)

键的顺序也将保留.

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