如何重新格式化JSON文件以包含数组

Question

I have a json file json_file which contains 2 records:

{"name": "XYZ", "address": "54.7168,94.0215", "country_of_residence": "PQR", "countries": "LMN;PQRST", "date": "28-AUG-2008", "type": null}
{"name": "OLMS", "address": null, "country_of_residence": null, "countries": "Not identified;No", "date": "23-FEB-2017", "type": null}

How can I reformat the file using python to make it have one array like this:

{
    "foo" : [
       {"name": "XYZ", "address": "54.7168,94.0215", "country_of_residence": "PQR", "countries": "LMN;PQRST", "date": "28-AUG-2008", "type": null},
       {"name": "OLMS", "address": null, "country_of_residence": null, "countries": "Not identified;No", "date": "23-FEB-2017", "type": null}
    ]
}

Answer 1

As your json file is invalid, we need to read it line by line:

import json

input_file = """{"name": "XYZ", "address": "54.7168,94.0215", "country_of_residence": "PQR", "countries": "LMN;PQRST", "date": "28-AUG-2008", "type": null}
{"name": "OLMS", "address": null, "country_of_residence": null, "countries": "Not identified;No", "date": "23-FEB-2017", "type": null}"""

output_dict = dict()
output_dict['foo'] = list()

for line in input_file.split('\n'):
    json_line = json.loads(line)
    output_dict['foo'].append(json_line)
print(json.dumps(output_dict, indent=2))

Then we create your desired data structure, and append each line of json to that data structure.

Answer 2

Your file has a JSON object on each line, which technically isn't a valid JSON syntax . You can work around that by loading each line individually with json.loads() like this:

import json

json_filename = 'json_file'

with open(json_filename) as file:
    array = {'foo': []}
    foo_list = array['foo']
    for line in file:
        obj = json.loads(line)
        foo_list.append(obj)

print(json.dumps(array, indent=4))

{
    "foo": [
        {
            "name": "XYZ",
            "address": "54.7168,94.0215",
            "country_of_residence": "PQR",
            "countries": "LMN;PQRST",
            "date": "28-AUG-2008",
            "type": null
        },
        {
            "name": "OLMS",
            "address": null,
            "country_of_residence": null,
            "countries": "Not identified;No",
            "date": "23-FEB-2017",
            "type": null
        }
    ]
}