从嵌套密钥python中提取值(Extract a value from within a nested key python)

从嵌套密钥python中提取值(Extract a value from within a nested key python)

我需要从python的嵌套关键字中提取出特定的值，例如从下面我想从关键字Params中提取出Start

{'Key': 'Params', 'Value': `'{"Shut":false,"Remove":false,"SnapshotRequired":false,"Start":"Never","End":"Never"}'}

这是我得到的

for tag in i["Tags"]: if 'Params' in tag['Key']:

那么我可以获得价值，但这是整个字符串。

I need to extract out a specific value from within a nested key in python for example from the below I want to extract out the Start from the key Params

{'Key': 'Params', 'Value': `'{"Shut":false,"Remove":false,"SnapshotRequired":false,"Start":"Never","End":"Never"}'}

This is as far as I have got

for tag in i["Tags"]: if 'Params' in tag['Key']:

then I can get the value but this is the whole string.

最满意答案

您可以使用dict.get(key)方法获取您在get()指定的键的值，其中dict是存储字典的变量。

你也可以使用dict[key] 。 它给出了相同的结果。

例如，在你的情况下， dict['Key']将返回'Params'， dict['Value']将返回嵌套字典。

You can use dict.get(key) method to get a value of the key you specify in get(), where dict is variable which stores your dictionary.

Also you can use dict[key]. It gives the same result.

In your case, for example, dict['Key'] will return 'Params', dict['Value'] will return nested dictionary.