如何在文件中写入 YAML 格式的数据?

2022-01-12 00:00:00 python pyyaml formatting yaml

问题描述

我需要使用 Python 将以下数据写入 yaml 文件:

I need to write the below data to yaml file using Python:

{A:a, B:{C:c, D:d, E:e}}

即字典中的字典.我怎样才能做到这一点?

i.e., dictionary in a dictionary. How can I achieve this?

解决方案

import yaml

data = dict(
    A = 'a',
    B = dict(
        C = 'c',
        D = 'd',
        E = 'e',
    )
)

with open('data.yml', 'w') as outfile:
    yaml.dump(data, outfile, default_flow_style=False)

default_flow_style=False 参数是生成您想要的格式(流样式)所必需的，否则对于嵌套集合，它会生成块样式:

The default_flow_style=False parameter is necessary to produce the format you want (flow style), otherwise for nested collections it produces block style:

A: a
B: {C: c, D: d, E: e}

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