用來自json的特定值填充pandas數據框

Question

我有一個很大的，深度嵌套的json，從中我只需要一些鍵值對，而不是全部。 因為它的嵌套非常深，所以直接從json創建一個pandas數據幀並不方便，因為我需要的所有值都不會在列中。

我需要創建應該如下所示的pandas數據框：

Groupe      Id   MotherName   FatherName
Advanced    56   Laure         James
Middle      11   Ann           Nicolas
Advanced    6    Helen         Franc

從我的復雜json中，我提取所需的值，如下所示（所有值均已正確提取，因此這里沒有錯誤）：

jfile=json.loads(data)
groupe=jfile['location']['groupe']
id=jfile['id']
MotherName=jfile['Mother']['MotherName']
FatherName=jfile['Father']['FatherName']

jfile看起來像：

{"location":{"town":"Rome","groupe":"Advanced", "school":{"SchoolGroupe":"TrowMet", "SchoolName":"VeronM"}}, "id":"145", "Mother":{"MotherName":"Helen","MotherAge":"46"},"NGlobalNote":2, "Father":{"FatherName":"Peter","FatherAge":"51"}, "Teacher":["MrCrock","MrDaniel"],"Field":"Marketing","season":["summer","spring"]}

然后，我創建一個空的數據框，並嘗試用以下值填充它：

df=pd.DataFrame(columns=['group', 'id', 'Father', 'Mother'])
for index,row in df.iterrows():
    row['groupe']=jfile['location']['groupe']
    row['id']=jfile['id']
    row['MotherName']=jfile['Father']['FatherName']
    row['id']=jfile['Mother']['MotherName']

但是當我嘗試打印它時，它說數據框為空：

空的DataFrame列：[groupe，id，MotherName，FatherName]索引：[]

為什么用這種方法是空的，如何正確填充它？

Answer 1

如果您只是想在數據框中添加一行，則可以使用

df = df.append({"groupe":group,"id":id,"MotherName":MotherName,"FatherName":FatherName},
                ignore_index=True)