替换 JSON 文件中 YAML 的值 - Python 3

Question

我想使用 Python 3 将 YAML 文件中的值替换为 JSON 文件。

我有许多 JSON 文件，我想从主 YAML 文件中获取值并仅替换某些值，例如源服务器 ip、Z0C4EBAZF57C2ABname.C7BACZF57C2ABname.C7BCA39A

例如，我有这个 YAML 文件（mast_conf.yaml）：

-  sourcesystem1:
    sourceServer: 1.2.3.500
    MailTo: gokul@gmail.com
-  sourcesystem2:
    sourceServer1: 2.2.3.500
    sourceServer2: 3.2.3.500
    MailTo: gokul@gmail.com

JSON 文件（sourcesystem1.json）：

{
    "source":"sourcesystem1",
    "frequency":"daily",
    "sourceServer":"1.2.1.2",
    "hostName":"1.2.1.3",
    "fileFormat":"csv",
    "delimiterType":"semicolon"
}

另一个 JSON 文件（sourcesystem2.json）：

{
    "source":"sourcesystem2",
    "frequency":"daily",
    "sourceServer":"1.2.3.2",
    "hostName":"1.2.1.7",
    "fileFormat":"csv",
    "delimiterType":"commaseperated"
}

下面是我试图解析 json 文件中的值的代码

import json
import yaml


with open("master_conf.yaml", 'r') as f:
yaml_config = yaml.safe_load(f)


yaml_config = {
list(config.keys()[0]): list(config[config.keys()[0]])
for config in yaml_config
}


json_files = ( "sourcesystem1.json",
"sourcesystem2.json",
)


for json_file in json_files:
with open(json_file, "r") as f:
sourcesystem_conf = json.load(f)


sourcesystem = sourcesystem_conf["source"]


if sourcesystem in yaml_config:
for key, value in yaml_config[sourcesystem].items():
sourcesystem_conf[key] = value


with open(json_file, "w") as f:
json.dump(sourcesystem_conf, f, indent=2)

我通过程序收到以下错误

TypeError: 'dict_keys' object does not support indexing

When I run indivudually I get this issue for yaml

>>> yaml_config = { ... config.keys()[0]: config[config.keys()[0]] ... for config in yaml_config ... } Traceback (most recent call last): File "<stdin>", line 3, in <module> File "<stdin>", line 3, in <dictcomp> TypeError: 'dict_keys' object is not subscriptable >>>

是否有更简单的方法来实现我的最终目标，我想从 Yaml 配置文件中替换 JSON 文件中的值

这需要以自动方式更新 1000 个 Json 文件，以便从主 Yaml 文件进行更新

Answer 1

最简单的方法是使用 pyyaml，请参阅Jon 的回答。

然后你可以使用它加载你的 yaml 文件：

>>> import yaml
>>> yaml_config = yaml.safe_load(yaml_file)
>>> yaml_config
[{'sourcesystem1': {'MailTo': 'gokul@gmail.com', 'sourceServer': '1.2.3.500'}},
 {'sourcesystem2': {'MailTo': 'gokul@gmail.com',
   'sourceServer1': '2.2.3.500',
   'sourceServer2': '3.2.3.500'}}]

使用源系统作为键来操作字典会更容易。

在 python 2 aDict.keys()返回一个列表，因此以下内容将起作用：

>>> yaml_config = {
    config.keys()[0]: config[config.keys()[0]]
    for config in yaml_config
}
>>> yaml_config
{'sourcesystem1': {'MailTo': 'gokul@gmail.com', 'sourceServer': '1.2.3.500'},
 'sourcesystem2': {'MailTo': 'gokul@gmail.com',
  'sourceServer1': '2.2.3.500',
  'sourceServer2': '3.2.3.500'}}

在 python 3 aDict.keys()不再返回列表，因此您可以简单地使用 for 循环：

yaml_config = {}
for config in yaml_config_raw:
    source = [key for key in config][0]
    yaml_config[source] = config[source]

然后你可以迭代你的 json 文件来更新它们：

import json
import yaml

with open("mast_conf.yaml", 'r') as f:
    yaml_config_raw = yaml.safe_load(f)


yaml_config = {}
for config in yaml_config_raw:
    source = [key for key in config][0]
    yaml_config[source] = config[source]

json_files = (
    "sourcesystem1.json",
    "sourcesystem2.json",
)

for json_file in json_files:
    with open(json_file, "r") as f:
        sourcesystem_conf = json.load(f)

    sourcesystem = sourcesystem_conf["source"]

    if sourcesystem in yaml_config:
        for key, value in yaml_config[sourcesystem].items():
            sourcesystem_conf[key] = value

    with open(json_file, "w") as f:
        json.dump(sourcesystem_conf, f, indent=2)