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Using pandas to convert csv into nested json with dynamic strucutre

I am new to python and now want to convert a csv file into json file. Basically the json file is nested with dynamic structure, the structure will be defined using the csv header.
From csv input:
ID, Name, person_id/id_type, person_id/id_value,person_id_expiry_date,additional_info/0/name,additional_info/0/value,additional_info/1/name,additional_info/1/value,salary_info/details/0/grade,salary_info/details/0/payment,salary_info/details/0/amount,salary_info/details/1/next_promotion
1,Peter,PASSPORT,A452817,1-01-2055,Age,19,Gender,M,Manager,Monthly,8956.23,unknown
2,Jane,PASSPORT,B859804,2-01-2035,Age,38,Gender,F,Worker, Monthly,125980.1,unknown
To json output:
[
{
"ID": 1,
"Name": "Peter",
"person_id": {
"id_type": "PASSPORT",
"id_value": "A452817"
},
"person_id_expiry_date": "1-01-2055",
"additional_info": [
{
"name": "Age",
"value": 19
},
{
"name": "Gender",
"value": "M"
}
],
"salary_info": {
"details": [
{
"grade": "Manager",
"payment": "Monthly",
"amount": 8956.23
},
{
"next_promotion": "unknown"
}
]
}
},
{
"ID": 2,
"Name": "Jane",
"person_id": {
"id_type": "PASSPORT",
"id_value": "B859804"
},
"person_id_expiry_date": "2-01-2035",
"additional_info": [
{
"name": "Age",
"value": 38
},
{
"name": "Gender",
"value": "F"
}
],
"salary_info": {
"details": [
{
"grade": "Worker",
"payment": " Monthly",
"amount": 125980.1
},
{
"next_promotion": "unknown"
}
]
}
}
]
Is this something can be done by the existing pandas API or I have to write lots of complex codes to dynamically construct the json object? Thanks.

$elemMatch to fetch specific values inside array

I have a collection named 'attendance' that has an array:
[
{
"faculty": "20XX-XXXXX-XX-1",
"sections": [
{
"section": "XXXX 3-1",
"date": "04-11-2022",
"attendance": [
{
"number": "XXXXX",
"status": "Present"
},
{
"number": "XXXXX",
"status": "Present"
},
{
"number": "XXXXX",
"status": "Present"
}
]
},
{
"section": "XXXX 3-2",
"date": "04-11-2022",
"attendance": [
{
"number": "XXXXX",
"status": "Present"
},
{
"number": "XXXXX",
"status": "Present"
},
{
"number": "XXXXX",
"status": "Present"
}
]
}
]
}
]
I have been trying to query the values of the specific element in my array using $and and $elemMatch in:
db.attendance.find({$and:[{faculty:"20XX-XXXXX-XX-1"},{sections:{$elemMatch:{section:"XXXX 3-1",date:"04-11-2022"}}}]});
But it still prints the other section rather than one. I want to output to be:
{
"faculty": "20XX-XXXXX-XX-1",
"sections": [
{
"section": "XXXX 3-1",
"date": "04-11-2022",
"attendance": [
{
"number": "XXXXX",
"status": "Present"
},
{
"number": "XXXXX",
"status": "Present"
},
{
"number": "XXXXX",
"status": "Present"
}
]
}
And I tried using the dot notation like:
db.attendance.find({"sections.section":"XXXX 3-1", "sections.date":"04-11-2022});
Still no luck. I'm not sure if what I'm doing is right or not. Thanks in advance!

Option 1: find/elemMatch-> You will need to add the $elemMatch also to the project section of the find query as follow:
db.collection.find({
"faculty": "20XX-XXXXX-XX-1",
sections: {
$elemMatch: {
section: "XXXX 3-1",
date: "04-11-2022"
}
}
},
{
sections: {
$elemMatch: {
section: "XXXX 3-1",
date: "04-11-2022"
}
}
})
Explained:
Find query has the following syntax:db.collection.find({query},{project})
Adding the project section allow you to filter the expected output.
playground option 1
Option 2: Via aggregation/$filter:
db.collection.aggregate([
{
"$addFields": {
"sections": {
"$filter": {
"input": "$sections",
"as": "s",
"cond": {
$and: [
{
$eq: [
"$$s.section",
"XXXX 3-1"
]
},
{
$eq: [
"$$s.date",
"04-11-2022"
]
}
]
}
}
}
}
}
])
Explaned:
Replace the original sections array with new ones where the array elements are filtered based on the provided criteria.
playground option 2

how to convert multi valued CSV to Json

I have a csv file with 4 columns data as below.
type,MetalType,Date,Acknowledge
Metal,abc123451,2018-05-26,Success
Metal,abc123452,2018-05-27,Success
Metal,abc123454,2018-05-28,Failure
Iron,abc123455,2018-05-29,Success
Iron,abc123456,2018-05-30,Failure
( I just provided header in the above example data but in my case i dont have header in the data)
how can i convert above csv file to Json in the below format...
1st Column : belongs to --> "type": "Metal"
2nd Column : MetalType: "values" : "value": "abc123451"
3rd column : "Date": "values":"value": "2018-05-26"
4th Column : "Acknowledge": "values":"value": "Success"
and remaining all columns are default values.
As per below format ,
{
"entities": [
{
"id": "XXXXXXX",
"type": "Metal",
"data": {
"attributes": {
"MetalType": {
"values": [
{
"source": "XYZ",
"locale": "Australia",
"value": "abc123451"
}
]
},
"Date": {
"values": [
{
"source": "XYZ",
"locale": "Australia",
"value": "2018-05-26"
}
]
},
"Acknowledge": {
"values": [
{
"source": "XYZ",
"locale": "Australia",
"value": "Success"
}
]
}
}
}
}
]
}

Even though jww is right, I built something for you:
I import the csv using pandas:
df = pd.read_csv('data.csv')
then I create a template for the dictionaries you want to add:
d_json = {"entities": []}
template = {
"id": "XXXXXXX",
"type": "",
"data": {
"attributes": {
"MetalType": {
"values": [
{
"source": "XYZ",
"locale": "Australia",
"value": ""
}
]
},
"Date": {
"values": [
{
"source": "XYZ",
"locale": "Australia",
"value": ""
}
]
},
"Acknowledge": {
"values": [
{
"source": "XYZ",
"locale": "Australia",
"value": ""
}
]
}
}
}
}
Now you just need to fill in the dictionary:
for i in range(len(df)):
d = template
d['type'] = df['type'][i]
d['data']['attributes']['MetalType']['values'][0]['value'] = df['MetalType'][i]
d['data']['attributes']['Date']['values'][0]['value'] = df['Date'][i]
d['data']['attributes']['Acknowledge']['values'][0]['value'] = df['Acknowledge'][i]
d_json['entities'].append(d)
I know my way of iterating over the df is kind of ugly, maybe someone knows a cleaner way.
Cheers!

Customize Python JSON object_hook

I am trying to customize json data using object_hook in Python 3, but do not know how to get started. Any pointers are much appreciated. I am trying to introduce a new key and move existing data into the new key in Python Object.
I am trying to convert below json text:
{
"output": [
{
"Id": "101",
"purpose": "xyz text",
"array": [
{
"data": "abcd"
},
{
"data": "ef gh ij"
}
]
},
{
"Id": "102",
"purpose": "11xyz text",
"array": [
{
"data": "abcd"
},
{
"data": "java"
},
{
"data": "ef gh ij"
}
]
}
]
}
to
{
"output": [
{
"Id": "101",
"mydata": {
"purpose": "xyz text",
"array": [
{
"data": "abcd"
},
{
"data": "ef gh ij"
}
]
}
},
{
"Id": "102",
"mydata": {
"purpose": "11xyz text",
"array": [
{
"data": "abcd"
},
{
"data": "java"
},
{
"data": "ef gh ij"
}
]
}
}
]
}
My Python JSON object hook is defined as:
class JSONObject:
def __init__( self, dict ):
vars(self).update( dict )
def toJSON(self):
return json.dumps(self, default=lambda o: o.__dict__,
sort_keys=True, indent=4)

You can specify a custom object_pairs_hook (input_json is the string with your input JSON).
def mydata_hook(obj):
obj_d = dict(obj)
if 'Id' in obj_d:
return {'Id': obj_d['Id'], 'mydata': {k: v for k, v in obj_d.items() if 'Id' not in k}}
else:
return obj_d
print(json.dumps(json.loads(input_json, object_pairs_hook=mydata_hook), indent=2))
And the output:
{
"output": [
{
"mydata": {
"array": [
{
"data": "abcd"
},
{
"data": "ef gh ij"
}
],
"purpose": "xyz text"
},
"Id": "101"
},
{
"mydata": {
"array": [
{
"data": "abcd"
},
{
"data": "java"
},
{
"data": "ef gh ij"
}
],
"purpose": "11xyz text"
},
"Id": "102"
}
]
}

How to search through JSON object for specific list o expected key values?

I have this json object, and I am curious how to iterate through servicecatalog:name and alert for any name that does not equal "service-foo" or "service-bar".
Here is my json object:
{
"access": {
"serviceCatalog": [
{
"endpoints": [
{
"internalURL": "https://snet-storage101.example.com//v1.0",
"publicURL": "https://storage101.example.com//v1.0",
"region": "LON",
"tenantId": "1
},
{
"internalURL": "https://snet-storage101.example.com//v1.0",
"publicURL": "https://storage101.example.com//v1.0",
"region": "USA",
"tenantId": "1
}
],
"name": "service-foo",
"type": "object-store"
},
{
"endpoints": [
{
"publicURL": "https://x.example.com:9384/v1.0/x",
"tenantId": "6y5t4re32"
}
],
"name": "service-bar",
"type": "rax:test"
},
{
"endpoints": [
{
"publicURL": "https://y.example.com:9384/v1.0/x",
"tenantId": "765432"
}
],
"name": "service-thesystem",
"type": "rax:test"
}
]
}

If x is the above mentioned dictionary. You could do
for item in x["access"]["serviceCatalog"]:
if item["name"] not in ["service-foo", "service-bar"]:
print(item["name"])
ps: you could use json.loads() to decode json data if you are asking for that. And also you have errors in your JSON.