Need help in python scripting

[rajrishi990]

I am new to python
I have below json file and i need to convert it to csv and pull only selected columns in csv.Selected columns will be id,SID,Type,ttt,S.
I am unable to figure out solution. PLease help

Output:
{
"test": [
{
"id": 1,
"name": "dummy",
"salary": [
{
"SID": "1",
"Type ": "INR",
"isMandatory": "Yes"
},
{
"SID": "2",
"Type": "DOLLAR",
"isMandatory": "No"
}
],
"ttt111": [
{
"ttt": 4,
"S": null
},
{
"ttt": 5,
"S": null
},
{
"ttt": 6,
"S": null
}
]
}}