如何基于python对象内部的值从对象的json数组中获取对象？

Question

I have a json array of objects that looks like this:

{
    "testcases": {
        "testcase": {
            "custom-fields": {
                "custom-field": [{
                    "@id": "testCaseID",
                    "@content": "shotwell15"
                }, {
                    "#text": "-",
                    "@id": "casecomponent"
                }, {
                    "#text": "critical",
                    "@id": "caseimportance"
                }]
            },
            "title": "Shotwell 15"
        }
    }
}

I am trying to use python and obtain the object from within the custom-field array based on the "value" of the @id like this:

finding the object:

{
   "#text": "critical",
   "@id": "caseimportance"
}

based on the value "caseimportance"

I tried to use filter, but that didn't seem to work. I think it shouldn't be this hard. something that is so simple to do in javascript or ruby. In ruby I could just use the .select method

Answer 1

python模块“ re”具有搜索功能，您可以查看该功能，该功能可以过滤出特定单词，然后使用索引选择该单词周围的其他单词/文本。

Answer 2

In Python you can use list comprehension similar to Ruby's select:

custom_fields = data["testcases"]["testcase"]["custom-fields"]["custom-field"]
filtered = [f for f in custom_fields if f["@id"] == "caseimportance"]

Python also has a filter that is more directly comparable to Ruby's select:

Python 2:

filtered = filter(lambda f: (f["@id"] == "caseimportance"), custom_fields)

Python 3:

filtered = list(filter(lambda f: (f["@id"] == "caseimportance"), custom_fields))

List comprehension is often considered more Pythonic however.