Extract part of json file using Python in another json file - json

Question

I want to extract part of an existing JSON file based on a list of keys and save it into another JSON file
For eg-
{
"211": {
"year": "2020",
"field": "chemistry"
},
"51": {
"year": "2019",
"field":"physics"
},
"5": {
"year": "2014",
"field":"Literature"
}
Lets say the list =[5,51]
Output json file should contain
{
"5": {
"year": "2014",
"field":"Literature"
},
"51": {
"year": "2019",
"field":"physics"
}
}
}
It should not contain data for key 211

Answer 1

I believe this will work for you:
import json
# Open input file and deserialize JSON to a dict
with open("input_file.json", "r", encoding="utf8") as read_file:
input_file_dict = json.load(read_file)
# List of id's you want
inc_id_list = [5,51,2,101]
output_dict = dict()
# Iterate over the input file JSON and only add the items in the list
for id in input_file_dict.keys():
if int(id) in inc_id_list:
output_dict[id] = input_file_dict.get(id)
# Serialize output dict to JSON and write to output file
with open('output_file.json', 'w') as output_json_file:
json.dump(output_dict, output_json_file)

Answer 2

try this :
l= {
"211": {
"year": "2020",
"field": "chemistry"
},
"51": {
"year": "2019",
"field":"physics"
},
"5": {
"year": "2014",
"field":"Literature"
} }
for i,v in l.items():
if(i!="211"):
print(i,v)

Answer 3

It's a dictionary of JSON, with a missing bracket at the end, so that is easily done with a comprehension:
mydict = { "211": { "year": "2020", "field": "chemistry" }, "51": { "year": "2019", "field":"physics" }, "5": { "year": "2014", "field":"Literature" }}
incList = [5, 51]
myAnswer = {k:v for (k,v) in mydict.items() if int(k) in incList}