Question

我想从python中的json值创建字典列表。 json数据是

.button {
  background : gray;
}

[data-url*=".nz"] .button{
  background : green
}

我想将此数据放入包含dicts数组（json的“ data”部分）的dicts数组（name1，name2，name3）中，类似

{
  "data": [
    {
      "date": "2017-07-28_15-54-10",
      "name": "name1",
      "state": "true"
    },
    {
      "date": "2017-07-29_15-54-10",
      "name": "name2",
      "state": "true"
    }
  ]
}

我得到了所有数据，我的代码是

[
  {
    "name1": [
      {
        "date": "2017-07-28_15-54-10"
      },
      {
        "state": "true"
      }
    ]
  },
  {
    "name2": [
      {
        "date": "2017-07-28_15-54-10"
      },
      {
        "state": "true"
      }
    ]
  }
]

我能够得到这个输出

for jn in data:
    name = jn.get("name")
    my_dict = {}
    my_dict1 = {}
    my_list = []
    my_dict["date"] = jn.get("date")
    my_dict1["state"] = jn.get("state")
    my_list.append(my_dict)   # dict for date
    my_list.append(my_dict1)   # dict for state
    my_name_dict = {}
    my_name_dict[name] = my_list   # add the small dicts to  the "name" dict
    my_final_array.append(my_name_dict)
    print(my_final_array)

我正在努力将这些字典添加到列表/数组中。当我打印{ "name1": [ { "date": "2017-07-28_15-54-10" }, { "state": "true" } ] }, { "name2": [ { "date": "2017-07-28_15-54-10" }, { "state": "true" } ] }的值时，我只是得到字典的最后一行，而不是列表中的所有行。我的代码也有些混乱，还有其他方法可以做到吗？

Answer 1

使用简单的列表理解：

# if you are reading data from a file...
import json

path = "/path/to/json"
d = json.load(open(path, "r"))

# ...else
d = {
    "data": [
        {
            "date": "2017-07-28_15-54-10", 
            "name": "name1", 
            "state": "true",
        }, 
        {
            "date": "2017-07-29_15-54-10", 
            "name": "name2", 
            "state": "true",
        }
        ]
    }

records = [{x["name"]: [{"date": x["date"]}, {"state": x["state"]}]} for x in d["data"]]
records

>>> [{'name1': [{'date': '2017-07-28_15-54-10'}, {'state': 'true'}]},
 {'name2': [{'date': '2017-07-29_15-54-10'}, {'state': 'true'}]}]

如果您打算向记录中添加更多键，则可以通过获取除name以外的所有键来使此列表更通用，例如：

records = [
    {x["name"]: [{k: v} for k, v in x.items() if k != "name"]} 
    for x in d["data"]
]

Answer 2

您可以尝试以下方法吗？

json_data = {
    "data": [
        {
            "date": "2017-07-28_15-54-10",
            "name": "name1",
            "state": "true",
        },
        {
            "date": "2017-07-29_15-54-10",
            "name": "name2",
            "state": "true",
        }
    ]
}
main_list = []
for val in json_data['data']:
    temp_dict = {}
    temp_key = val.pop('name')
    temp_dict[temp_key] = [val]
    main_list.append(temp_dict)
print(main_list)

输出：

[  
    {  
        'name1':[  
            {  
                'date':'2017-07-28_15-54-10',
                'state':'true'
            }
        ]
    },
    {  
        'name2':[  
            {  
                'date':'2017-07-29_15-54-10',
                'state':'true'
            }
        ]
    }
]

Answer 3

Pythonic的方法似乎是字典理解

a = {
  "data": [
    {
      "date": "2017-07-28_15-54-10",
      "name": "name1",
      "state": "true"
    },
    {
      "date": "2017-07-29_15-54-10",
      "name": "name2",
      "state": "true"
    }
  ]
}

output = [{item['name']: {k: v for (k, v) in item.items() if k is not 'name'} for item in a['data']}]

output
> [{'name1': {'date': '2017-07-28_15-54-10', 'state': 'true'}, 'name2': {'date': '2017-07-29_15-54-10', 'state': 'true'}}]

Answer 4

r = {
  "data": [
    {
      "date": "2017-07-28_15-54-10",
      "name": "name1",
      "state": "true",
    },
     {
      "date": "2017-07-29_15-54-10",
      "name": "name2",
      "state": "true",
    }
   ]
  }

data = r['data']
result = []
mkdic = lambda x: [{k: v} for k, v in x.items() if k != "name"]
for i in data:
    result.append( {i.get("name"): mkdic(i) })
import pprint
pprint.pprint(result, indent = 2)

Answer 5

您需要在for语句下创建最终列表，如下所示：

my_final_array = []
for jn in data:
    name = jn.get("name")
    my_dict = {}
    my_dict1 = {}
    my_list = []
    my_dict["date"] = jn.get("date")
    my_dict1["state"] = jn.get("state")
    my_list.append(my_dict)   # dict for date
    my_list.append(my_dict1)   # dict for state
    my_name_dict = {}
    my_name_dict[name] = my_list   # add the small dicts to  the "name" dict
    my_final_array.append(my_name_dict)
    print(my_final_array)

从python中的JSON数据创建字典列表

5 个答案: