You're using json.dumps to create a JSON representation of your data. Then you're using json.dump to create a JSON representation of that representation. You're double-JSONifying it. Just use one or the other.

You are using pretty print, if you want to avoid new lines do not use indent flag.

import json

data = {'people': [{'name': 'Scott', 'website': 'stackabuse.com', 'from': 'Nebraska'}]}

print(json.dumps(data))

{"people": [{"name": "Scott", "website": "stackabuse.com", "from": "Nebraska"}]}

Your version just use nice formatting:

import json

data = {'people': [{'name': 'Scott', 'website': 'stackabuse.com', 'from': 'Nebraska'}]}

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

{
    "people": [
        {
            "name": "Scott",
            "website": "stackabuse.com",
            "from": "Nebraska"
        }
    ]
}

In addition - new lines have no matter for json. Below two examples works same:

import json

data = {'people': [{'name': 'Scott', 'website': 'stackabuse.com', 'from': 'Nebraska'}]}

with open('/tmp/file1', 'w') as f:
    json.dump(data, f, indent=4)

with open('/tmp/file2', 'w') as f:
    json.dump(data, f)

with open('/tmp/file1') as f:
    print(json.load(f))

with open('/tmp/file2') as f:
    print(json.load(f))

{'people': [{'name': 'Scott', 'website': 'stackabuse.com', 'from': 'Nebraska'}]}
{'people': [{'name': 'Scott', 'website': 'stackabuse.com', 'from': 'Nebraska'}]}

If you want to produce valid JSON file you need to write all values at once, not one value at a time (which will produce ndjson or JSON lines)

So, for a valid JSON

values = [{"first_name": "John", "last_name": "Smith", "food": "corn"},
          {"first_name": "Jane", "last_name": "Doe", "food": "soup"}]

import json
with open('some_file.json', 'w') as f:
    json.dump(values, f, indent=4)

some_file.json

[
    {
        "first_name": "John",
        "last_name": "Smith",
        "food": "corn"
    },
    {
        "first_name": "Jane",
        "last_name": "Doe",
        "food": "soup"
    }
]

if you really need ndjson - you can use ndjson package (need install via pip from PyPi).

import ndjson

with open('some_file2.ndjson', 'w') as f:
    ndjson.dump(values, f)

some_file2.ndjson

{"first_name": "John", "last_name": "Smith", "food": "corn"}
{"first_name": "Jane", "last_name": "Doe", "food": "soup"}

Alternative to ndjson package is jsonlines package