How do I make an User required JSON - python-2.7

Question

I have a JSON file, in that three objects are available, In that 2nd and 3rd objects does not have some fields which I actually needed. In missing fields, I need to add my own values. I will provide my code below
I tried this So far:
with open("final.json") as data1:
a = json.load(data1)
final = []
for item in a:
d = {}
d["AppName"]= item["name"]
d["AppId"] = item["id"]
d["Health"] = item["health"]
d["place1"] = item["cities"][0]["place1"]
d["place2"] = item["cities"][0]["place2"]
print(final)
Error: I am getting Key Error
My Input JSON file has similar data:
[{
"name": "python",
"id": 1234,
"health": "Active",
"cities": {
"place1": "us",
"place2": "newyork"
}
},
{
"name": "java",
"id": 2345,
"health": "Active"
}, {
"name": "python",
"id": 1234
}
]
I am expecting output:
[{
"name": "python",
"id": 1234,
"health": "Active",
"cities": {
"place1": "us",
"place2": "newyork"
}
},
{
"name": "java",
"id": 2345,
"health": "Null",
"cities": {
"place1": "0",
"place2": "0"
}
}, {
"name": "python",
"id": 1234,
"health": "Null",
"cities": {
"place1": "0",
"place2": "0"
}
}
]

Answer 1

I see two issues with the code that you have posted.
First, you are referring to the 'cities' field in you input JSON as if it is a list when it is, in fact, an object.
Second, to handle JSON containing objects which may be missing certain fields, you should use the Python dictionary get method. This method takes a key and an optional value to return if the key is not found (default is None).
for item in a:
d = {}
d["AppName"]= item["name"]
d["AppId"] = item["id"]
d["Health"] = item.get("health", "Null")
d["place1"] = item.get("cities", {}).get("place1", "0")
d["place2"] = item.get("cities", {}).get("place2", "0")