[英]Convert list of ordered dict to nested lists
我列出了有序的dict,其中包括數據中的一些重復的ID ...這樣的事情
[OrderedDict([('caseId', 20), ('userId', 1), ('emailStatus', 21)]),
OrderedDict([('caseId', 20), ('userId', 1), ('emailStatus', 20)]),
OrderedDict([('caseId', 18), ('userId', 4), ('emailStatus', 21)]),
OrderedDict([('caseId', 19), ('userId', 3), ('emailStatus', 21)]),
OrderedDict([('caseId', 18), ('userId', 1), ('emailStatus', 20)]),
OrderedDict([('caseId', 20), ('userId', 3), ('emailStatus', 21)]),
OrderedDict([('caseId', 18), ('userId', 4), ('emailStatus', 20)]),
OrderedDict([('caseId', 19), ('userId', 1), ('emailStatus', 20)])]
我想得到一個嵌套列表列表,就像這樣;
[{
"caseId": "20",
"users": [
{
"userId": "1",
"emailStatus": [
{
"emailStatus" : "20"
},
{
"emailStatus" : "21"
}
]
},
{
"userId": "3",
"emailStatus": [
{
"emailStatus" : "21"
}
]
}
]
},
{
"caseId": "19",
"users": [
{
"userId": "1",
"emailStatus": [
{
"emailStatus" : "20"
}
]
},
{
"userId": "3",
"emailStatus": [
{
"emailStatus" : "21"
}
]
}
]
},
{
"caseId": "18",
"users": [
{
"userId": "1",
"emailStatus": [
{
"emailStatus" : "20"
}
]
},
{
"userId": "4",
"emailStatus": [
{
"emailStatus" : "20"
},
{
"emailStatus" : "21"
}
]
}
]
}
]
呈現這樣的嵌套列表;
我試圖通過迭代兩個列表來實現這一點,但無法知道如何記錄上一個和下一個記錄以及相同的數據..這太令人困惑了......如果有人能給我一個開頭,我可以如何迭代我的列表,你真好。
很多問候..
更新的問題
首先,您可以使用循環和dict.setdefault
將數據dict.setdefault
到嵌套的dict中:
temp = {}
for d in lst:
temp.setdefault(d["caseId"], {}).setdefault(d["userId"], []).append(d["emailStatus"])
print(temp)
# {18: {1: [20], 4: [21, 20]}, 19: {1: [20], 3: [21]}, 20: {1: [21, 20], 3: [21]}}
或者使用collections.defaultdict
:
temp = defaultdict(lambda: defaultdict(list))
for d in lst:
temp[d["caseId"]][d["userId"]].append(d["emailStatus"])
然后,使用嵌套的混合字典和列表推導來聚合最終結果:
res = [{"caseId": case, "users": [{"userId": user, "emailStatus": [{"emailStatus": s} for s in status]}
for user, status in users.items()]}
for case, users in temp.items()]
print(res)
# [{'caseId': 18, 'users': [{'userId': 1, 'emailStatus': [{'emailStatus': 20}]}, {'userId': 4, 'emailStatus': [{'emailStatus': 21}, {'emailStatus': 20}]}]},
# {'caseId': 19, 'users': [{'userId': 1, 'emailStatus': [{'emailStatus': 20}]}, {'userId': 3, 'emailStatus': [{'emailStatus': 21}]}]},
# {'caseId': 20, 'users': [{'userId': 1, 'emailStatus': [{'emailStatus': 21}, {'emailStatus': 20}]}, {'userId': 3, 'emailStatus': [{'emailStatus': 21}]}]}]
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