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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _process_json(json_data):
 """ return a list of GradDegree objects. """

    requests = []
    for item in json_data:
        degree = GradDegree()
        degree.degree_title = item["degreeTitle"]
        degree.exam_place = item["examPlace"]
        degree.exam_date = parse_datetime(item.get("examDate"))
        degree.req_type = item["requestType"]
        degree.major_full_name = item["majorFullName"]
        degree.submit_date = parse_datetime(item.get("requestSubmitDate"))
        degree.decision_date = parse_datetime(item.get('decisionDate'))
        degree.status = item["status"]
        degree.target_award_year = item["targetAwardYear"]
        if item.get("targetAwardQuarter")and\
           len(item.get("targetAwardQuarter")):
            degree.target_award_quarter = item["targetAwardQuarter"].lower()

        requests.append(degree)
    return requests