python写入yanl文件之前添加注释

注释的方法

yaml_set_comment_before_after_key(key,before='123',after='123',after_indent=2) 某个key上面和下面（注意缩进）添加注释

yaml_set_start_comment('123') 在某key的开始添加注释

yaml_add_eol_comment('123',column=12) 在某个key后面添加注释

yaml格式示例
groups:
- name: alertgroupname
  rules:
  - alert: alertname
    expr: expression
    for: 1s
    labels:
      isMerge: 'true'
    annotations:
      summary: "summary"
      value: '{{$value}}'

#尝试给yaml添加注释
yml_data = yaml.round_trip_load(yaml.round_trip_dump(tempDic))
for data in yml_data:
    #在标题后添加注释
    #yml_data[data].yaml_add_eol_comment('外部接入告警', column=12)
    #在标题下面加入
    #yml_data[data][0]['rules'].yaml_set_start_comment('外部接入告警', indent=2)
    rule = yml_data[data][0]['rules']
    length = len(rule)
    start_num = new_or_old_flag + length
    for i in range(start_num):
        if desc[i] != '':
            rule[i].yaml_set_start_comment(desc[i], indent=2)

　　

groups:
- name: alertgroupname
  rules:
  # alert comment
  - alert: alertname
    expr: expression
    for: 1s
    labels:
      isMerge: 'true'
    annotations:
      summary: "summary"
      value: '{{$value}}'