| The JSON file structure of data from one topic is as follows: | |
| ```json | |
| { | |
| "max_scores" : [list of numbers] , | |
| "attempts" : [ | |
| { | |
| "id " : str, | |
| "records" : [list of lists of numbers], | |
| } | |
| ] | |
| } | |
| ``` | |
| where: | |
| • max_scores: The length of the list is the number of questions of the topic, and the value of each | |
| element is the maximum score for a question, | |
| • attempts: List of student attempts. | |
| • id: Student ID | |
| • records: The length of the outer list is the number of questions of the topic, the length of each inner | |
| list is the number of submissions of the question, and each item in the inner list is the score of the | |
| submission |