Invoke jq on every new json object printed by Python script, not just on completion

I have a python script that watches a socket and when data is received it writes JSON to stdout.

This sample script below illustrates the behaviour, outputting new JSON every 3 seconds.

import json, time

def new_json(n):
    frame = {
        "Iteration": n,
        "Field0": 0,
        "Field1": 1,
        "Field2": 2
    }
    print(json.dumps(frame))

new_json(1)
time.sleep(3)
new_json(2)
time.sleep(3)
new_json(3)

The output of this is:

{"Iteration": 1, "Field0": 0, "Field1": 1, "Field2": 2}
{"Iteration": 2, "Field0": 0, "Field1": 1, "Field2": 2}
{"Iteration": 3, "Field0": 0, "Field1": 1, "Field2": 2}

If i pipe this into jq using python3 jqtest.py | jq . it only prints the JSON when the script has completely finished.

How can i invoke jq for every new JSON object received during execution, not just at the end?