I have a json-like file with valid json per line that looks like
{"Some_key": {"name": "Tom", "school_code":"5678", "sport": "football", "score":"3.46", "classId": "456"}}
{"Another_one": {"name": "Helen", "school_code":"7657", "sport": ["swimming", "score":"9.8", "classId": "865"}}
{"Yet_another_one_": {"name": "Mikle", "school_code":"7655", "sport": "tennis", "score":"5.7", "classId": "76532"}}
("Some_key":"3.46", "Another_Key":"9.8", "Yet_another_one_"; "5.7")
This works for Python2 and Python3
>>> {k: v.get('score') for item in data for k, v in item.items()}
{'Another_one': '9.8', 'Some_key': '3.46', 'Yet_another_one_': '5.7'}