python解析json方式

@algorithm.route("/search", methods=["POST", "GET"])
def show_index():
    # as_text=True 接收json内容
    json_str = json.loads(request.get_data(as_text=True))
    target_text = ''
    list = None
    for key, value in json_str.items():
        if key=="key":
                target_text = value
        else:
                list = value

    # 定义字典    
    corpus_text = {}
    for item in list:
            corpus_text[item["index"]]=item["field"]