[英]Transforming List of dicts to nested list of dicts
我有一個這樣的基礎數據,在d_id中的數據庫中有唯一的ID。 (數據命名為“輸入”)
[
{
"d_id": "a1",
"d_name": "Fishing",
"location": "ABC",
"location_id": 1,
"rest_id": 2,
"rest_name": "Grilling"
},
{
"d_id": "a2",
"d_name": "catching",
"location": "ABC",
"location_id": 1,
"rest_id": 3,
"rest_name": "Kayaking"
},
{
"d_id": "a3",
"d_name": "Fishing2",
"location": "ABC",
"location_id": 1,
"rest_id": 2,
"rest_name": "Grilling"
},
{
"d_id": "a4",
"d_name": "Watering",
"location": "DEF",
"location_id": 2,
"rest_id": 4,
"rest_name": "Careoff"
}
]
我想按以下方式制作字典,這是按location_id,rest_id和d_id分類的嵌套json:
地區將具有多個位置,每個位置將具有多個rest_id,並且每個其余部分將具有多個d_id
{
"localities" : [
{
"location": "ABC",
"location_id": 1,
"rest_details": [
{
"rest_id": 2,
"rest_name": "Grilling",
"d_details" : [
{
"d_id" : "a1",
"d_name" : "Fishing"
},
{
"d_id" : "a3",
"d_name" : "Fishing2"
}
]
},
{
"rest_id": 3,
"rest_name": "Kayaking",
"d_details" : [
{
"d_id" : "a2",
"d_name" : "catching"
}
]
}
]
},
{
"location" : "DEF",
"location_id": 2,
"rest_details": [
{
"rest_id" : 4,
"rest_name" : "Careoff",
"d_details" : [
{
"d_id" : "a4",
"d_name": "Watering"
}
]
}
]
}
]
}
在過去的幾天中,我嘗試了以下操作,其中嘗試將數據分為location_info,rest_info和d_info:
location_info = []
location_fields = {'location', 'location_id', 'd_id', 'rest_id' }
for item in input:
loc = {key:value for key,value in item.items() if key in location_fields}
location_info.append(loc)
k=1
while k<len(location_info):
if location_info[k] == location_info[k-1]:
location_info.pop(k-1)
else:
k = k+1
rest_info = []
rest_fields = {'rest_name','rest_id', 'd_id', 'loc_id'}
for item in input:
res = {key:value for key,value in item.items() if key in restaurant_fields}
restaurant_info.append(res)
d_info = []
d_fields = {'d_id', 'd_name', 'location_id'}
for item in input:
dis = {key:value for key,value in item.items() if key in d_fields}
d_info.append(dis)
for ta in location_info:
for tb in rest_info:
if ta['loc_id'] == tb['loc_id']:
ta['localities'] = tb
tb不會產生預期結果的第一回合。
您的代碼充滿錯誤。 您至少應該自己運行每個代碼片段,並查看它們是否給出了所需的步驟輸出(因為它們沒有提供)。
除此之外,您的方法似乎不必要地復雜。 我會這樣嘗試:
locations = {}
for elem in input:
rest_details = []
curr_rest_detail = {"rest_id": elem["rest_id"], "rest_name":elem["rest_name"], "d_details":[{"d_id":elem["d_id"], "d_name":elem["d_name"]}]}
try:
rest_details = locations[elem["location_id"]]["rest_details"]
rest_detail_exists = False
for detail in rest_details:
if detail["rest_id"] == curr_rest_detail["rest_id"]:
rest_detail_exists = True
detail["d_details"].append({"d_id":elem["d_id"], "d_name":elem["d_name"]})
break
if not rest_detail_exists:
rest_details.append(curr_rest_detail)
except KeyError:
locations[elem["location_id"]] = {"location": elem["location"], "location_id":elem["location_id"], "rest_details":[curr_rest_detail]}
result = {"localities": [value for value in locations.values()]}
這段代碼基本上會迭代您輸入的元素,並在尚不存在任何條目時添加一個條目。 如果已經存在,則僅附加其他信息。
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