python - 如何合并 JSON 数组和数组

Question

我有如下两个数组:

数组 1:

[
    {"name": "A", "class" : "1"},
    {"name": "B", "class" : "2"},
    {"name": "C", "class" : "3"}
]

数组 2:

[ "A","B"]

我想合并 2 个数组，我的预期结果是:

[
    {"name": "A", "class" : "1"},
    {"name": "B", "class" : "2"}
]

感谢任何建议

到目前为止我发现了什么:

Answer 1

只需使用list理解:

first = [
         {"name": "A", "class" : "1"},
         {"name": "B", "class" : "2"},
         {"name": "C", "class" : "3"}
]

second = ['A', 'B']

result = [d for d in first if d['name'] in second]
print(result)

输出:

[{'name': 'A', 'class': '1'}, {'name': 'B', 'class': '2'}]

在评论中提出的案例:

from operator import itemgetter

first = [
         {"name": "A", "class" : "1"},
         {"name": "B", "class" : "2"},
         {"name": "C", "class" : "3"}
]

second = [
         {"name": "A"},
         {"name": "B"}
]

result = [d for d in first if d['name'] in map(itemgetter('name'), second)]
print(result)

输出:

[{'name': 'A', 'class': '1'}, {'name': 'B', 'class': '2'}]