我是Python的新手，我希望在字典中的列表中迭代字典（我知道令人困惑）。my_dict = {"John": [{"class": "math", "score": 100, "year": 2014}, {"class": "english", "score": 85, "year": 2015}], "Timmy": [{"class": "math", "score": 87, "year": 2014}, {"class": "english", "score": 91, "year": 2015}], "Sally":[{"class": "math", "score": 95, "year": 2014}]}我需要創建一個關于學生姓名及其綜合分數的新字典（Sally只有一個分數）。輸出將如下所示：new_dict = {"John": 185, "Timmy": 178, "Sally": 95}任何幫助或指導將不勝感激！
2 回答
鴻蒙傳說
TA貢獻1865條經驗 獲得超7個贊
使用字典理解：
{k: sum(x['score'] for x in v) for k, v in my_dict.items()}
驗證碼：
my_dict = {"John": [{"class": "math", "score": 100, "year": 2014}, {"class": "english", "score": 85, "year": 2015}],
"Timmy": [{"class": "math", "score": 87, "year": 2014}, {"class": "english", "score": 91, "year": 2015}],
"Sally":[{"class": "math", "score": 95, "year": 2014}]}
new_dict = {k: sum(x['score'] for x in v) for k, v in my_dict.items()}
# {'John': 185, 'Timmy': 178, 'Sally': 95}
慕后森
TA貢獻1802條經驗 獲得超5個贊
我試圖編寫一個程序來解決這種情況。
score_dict = {}
for name in my_dict:
score_dict[name] = 0
class_items = my_dict[name]
for class_item in class_items:
score_dict[name] += class_item['score']
print score_dict
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