Why can't Python parse this JSON data?

I have this JSON in a file:
{
"maps": [
{
"id": "blabla",
"iscategorical": "0"
},
{
"id": "blabla",
"iscategorical": "0"
}
],
"masks": [
"id": "valore"
],
"om_points": "value",
"parameters": [
"id": "valore"
]
}


I wrote this script to print all of the JSON data:
import json
from pprint import pprint

with open('data.json') as f:
data = json.load(f)

pprint(data)


This program raises an exception, though:
Traceback (most recent call last):
File "", line 5, in
data = json.load(f)
File "/usr/lib/python3.5/json/__init__.py", line 319, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3.5/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.5/json/decoder.py", line 355, in raw_decode
obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 13 column 13 (char 213)


How can I parse the JSON and extract its values?

Your data is not valid JSON format. You have [] when you should have {} for the "masks" and "parameters" elements:

• [] are for JSON arrays, which are called list in Python

• {} are for JSON objects, which are called dict in Python

Here's how your JSON file should look:
{
"maps": [
{
"id": "blabla",
"iscategorical": "0"
},
{
"id": "blabla",
"iscategorical": "0"
}
],
"masks": {
"id": "valore"
},
"om_points": "value",
"parameters": {
"id": "valore"
}
}


Then you can use your code:
import json
from pprint import pprint

with open('data.json') as f:
data = json.load(f)

pprint(data)


With data, you can now also find values like so:
data["maps"][0]["id"]
data["masks"]["id"]
data["om_points"]


Try those out and see if it starts to make sense.

Stack Overflow Q#2835559, score: 2193