How to merge two different JSON (using python) - json

Question

I'm totally new to python. I want to merge two JSON files who have the same objects but different keys.
Here is a basic example of the result I would love to get :
JSON1 :
{
"json1" : {
"1" : {
"id": 1,
"name": "first_artist",
"imageUrl": "https://1.jpg",
"genre": "Rap "
},
"2" : {
"id": 2,
"name": "second_artist",
"imageUrl": "https://2.jpg",
"genre": "Hip-Hop"
}
}
}
JSON2:
{
"json2" : {
"1" : {
"date": 17/07/19,
"venue": "venue1"
},
"2" : {
"date": 19/07/19,
"venue": "venue2"
}
}
}
Expected JSON:
{
"expected_json" : {
"1" : {
"id": 1,
"name": "first_artist",
"imageUrl": "https://1.jpg",
"genre": "Rap "
"date": 17/07/19,
"venue": "venue1"
},
"2" : {
"id": 2,
"name": "second_artist",
"imageUrl": "https://2.jpg",
"genre": "Hip-Hop"
"date": 19/07/19,
"venue": "venue2"
}
}
}
Can someone give tips and direction to make this possible ? Thanks

Answer 1

You can simplify your input to:
A.json:
{
"1" : {
"id": 1,
"name": "first_artist",
"imageUrl": "https://1.jpg",
"genre": "Rap "
},
"2" : {
"id": 2,
"name": "second_artist",
"imageUrl": "https://2.jpg",
"genre": "Hip-Hop"
}
}
B.json:
{
"1" : {
"date": "17/07/19",
"venue": "venue1"
},
"2" : {
"date": "19/07/19",
"venue": "venue2"
}
}
and you have to change 19/07/19 to "19/07/19" for it to be valid json.
Now you can use the json module:
import json
#from pprint import pprint
# load json from files
with open('A.json') as A_file:
A = json.load(A_file) # returns a dict()
#print('A:')
#pprint(A)
with open('B.json') as B_file:
B = json.load(B_file)
#print('\nB:')
#pprint(A)
# get a list of unique keys -> {'1', '2'}
keys = set()
keys.update(A.keys())
keys.update(B.keys())
#print(f'\nkeys: {keys}')
# for each key merge values from dicts A and B
result = {}
for key in keys:
#print(f'\n{key}:')
merge = {}
if key in A:
merge.update(A[key])
if key in B:
merge.update(B[key])
#pprint(merge)
result[key] = merge
#print('\nresult:')
#pprint(result)
# write the result to expected.json
with open('expected.json', 'w+') as expected_file:
expected_file.write(json.dumps(result, sort_keys=True, indent='\t'))
This writes:
expected.json:
{
"1": {
"date": "17/07/19",
"genre": "Rap ",
"id": 1,
"imageUrl": "https://1.jpg",
"name": "first_artist",
"venue": "venue1"
},
"2": {
"date": "19/07/19",
"genre": "Hip-Hop",
"id": 2,
"imageUrl": "https://2.jpg",
"name": "second_artist",
"venue": "venue2"
}
}