Question

我是python编程的新手。输入的X.yaml文件包含字典列表的列表。我正在尝试打印列表及其子列表项。

输入：X.Yaml

    entities:
        - level: undefined
          name: a
          refs:
              - b
          reqs: []
        - level: undefined
          name: c
          refs:
              - b
          reqs: []

代码：

data = yaml.load(yamlfile)
for entity in data["entities"]:
     #Needed help here.

期望的输出：

-name: a
 refs:
     - b
 reqs: []
-name: c
 refs:
    - b
 reqs: []

Answer 1

将yaml.dump()与default_flow_style=False：

一起使用

>>> print yaml.dump(data['entities'], default_flow_style=False)
- level: undefined
  name: a
  refs:
  - b
  reqs: []
- level: undefined
  name: c
  refs:
  - b
  reqs: []

如果您不想要＆＃39;级别＆＃39;，那么首先从实体中删除它：

>>> new_entities = [{key: value for key, value in entity.items() if key != 'level'}
...                 for entity in data['entities']]
>>>
>>> print yaml.dump(new_entities, default_flow_style=False)
- name: a
  refs:
  - b
  reqs: []
- name: c
  refs:
  - b
  reqs: []

>>>

编辑：如果列表和字典理解混乱，这是编写它的长（并且性能较低）方式：

>>> new_entities = []
>>> for entity in data['entities']:
...     new_ent = {}
...     for key, value in entity.items():
...         if key != 'level':
...             new_ent[key] = value
...     new_entities.append(new_ent)
...
>>> # then dump `new_entities`

在字典中打印多个YAML列表

1 个答案: