如何迭代JSON数组?

2024-03-29 04:37:57 发布

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我有一个具有多个根的JSON数组:

[
  {
  "issuer_ca_id": 16418,
  "issuer_name": "C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3",
  "name_value": "sub.test.com",
  "min_cert_id": 325717795,
  "min_entry_timestamp": "2018-02-08T16:47:39.089",
  "not_before": "2018-02-08T15:47:39"
  },
{
"issuer_ca_id":9324,
"issuer_name":"C=US, O=Amazon, OU=Server CA 1B, CN=Amazon",
"name_value":"marketplace.test.com",
"min_cert_id":921763659,
"min_entry_timestamp":"2018-11-05T19:36:18.593",
"not_before":"2018-10-31T00:00:00",
"not_after":"2019-11-30T12:00:00"
}
]

我想迭代它并用Python打印issuer_name值。有什么解决办法吗?在


Tags: nametestcomidcertvaluenotcn
1条回答
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1楼 · 发布于 2024-03-29 04:37:57

使用json包并加载json。假设它是内存中的字符串(与.json文件相反):

jsonstring = """
[
  {
  "issuer_ca_id": 16418,
  "issuer_name": "C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3",
  "name_value": "sub.test.com",
  "min_cert_id": 325717795,
  "min_entry_timestamp": "2018-02-08T16:47:39.089",
  "not_before": "2018-02-08T15:47:39"
  },
{
"issuer_ca_id":9324,
"issuer_name":"C=US, O=Amazon, OU=Server CA 1B, CN=Amazon",
"name_value":"marketplace.test.com",
"min_cert_id":921763659,
"min_entry_timestamp":"2018-11-05T19:36:18.593",
"not_before":"2018-10-31T00:00:00",
"not_after":"2019-11-30T12:00:00"
}
]"""

import json
j = json.loads(jsonstring)
[item["issuer_name"] for item in j]

给出:

^{pr2}$

现在,在我看来,这些名称不像名称,但这是分配给issuer_name字段的名称,所以我认为这是您必须与数据所有者讨论的问题。在

如果它是一个文件,则按以下基本模式进行加载:

# something like this
with open("jsonfile.json", "rb") as fp:
    j = json.load(fp) 

请参阅此处的文档:https://docs.python.org/3.7/library/json.html

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