我創建了一本字典：new_list = {}這使， {'date': '13/09/2020', 'day': '13', 'month': '9', 'year': '2020', 'cases': '35', 'deaths': '0', 'countriesAndTerritories': 'Afghanistan', 'countryTerritoryId': 'AF', 'countryTerritoryCode': 'AFG', 'population2019': '38041757', 'continent': 'Asia', 'cumulativeper1000002Weeks': '1.3090878'} {'date': '12/9/20', 'day': '12', 'month': '9', 'year': '2020', 'cases': '34', 'deaths': '0', 'countriesAndTerritories': 'Afghanistan', 'countryTerritoryId': 'AF', 'countryTerritoryCode': 'AFG', 'population2019': '38041757', 'continent': 'Asia', 'cumulativeper1000002Weeks': '1.22496971'} {'date': '11/9/20', 'day': '11', 'month': '9', 'year': '2020', 'cases': '28', 'deaths': '0', 'countriesAndTerritories': 'Afghanistan', 'countryTerritoryId': 'AF', 'countryTerritoryCode': 'AFG', 'population2019': '38041757', 'continent': 'Asia', 'cumulativeper1000002Weeks': '1.16450983'}但現在我想將這本詞典添加到列表中dataset= [new_list] 這使，[{'date': '13/09/2020', 'day': '13', 'month': '9', 'year': '2020', 'cases': '35', 'deaths': '0', 'countriesAndTerritories': 'Afghanistan', 'countryTerritoryId': 'AF', 'countryTerritoryCode': 'AFG', 'population2019': '38041757', 'continent': 'Asia', 'cumulativeper1000002Weeks': '1.3090878'}][{'date': '12/9/20', 'day': '12', 'month': '9', 'year': '2020', 'cases': '34', 'deaths': '0', 'countriesAndTerritories': 'Afghanistan', 'countryTerritoryId': 'AF', 'countryTerritoryCode': 'AFG', 'population2019': '38041757', 'continent': 'Asia', 'cumulativeper1000002Weeks': '1.22496971'}][{'date': '11/9/20', 'day': '11', 'month': '9', 'year': '2020', 'cases': '28', 'deaths': '0', 'countriesAndTerritories': 'Afghanistan', 'countryTerritoryId': 'AF', 'countryTerritoryCode': 'AFG', 'population2019': '38041757', 'continent': 'Asia', 'cumulativeper1000002Weeks': '1.16450983'}]然而我試圖得到結果（所以只有“[]”在開始和結束），因為這樣我就可以做 dataset[0:2]（否則它會給我“Nonetype”對象不可下標）并且它只會給出前兩個字典
1 回答
湖上湖
TA貢獻2003條經驗 獲得超2個贊
import csv
def read_dataset() -> List[Dict[str,str]]:
dataset = []
with open('covid-19.csv', 'r') as file:
reader = csv.reader(file)
no_head = next(reader, None)
for row in reader:
lst = [
'date',
'day',
'month',
'year',
'cases',
'deaths',
'countriesAndTerritories',
'countryTerritoryId',
'countryTerritoryCode',
'population2019',
'continent',
'cumulativeper1000002Weeks',
]
new_list = {}
for x in range(len(lst)):
new_list[lst[x]] = row[x]
dataset.append(new_list)
#print(dataset)
return dataset
dataset = read_dataset()
print(dataset[0:2])
區別在于您必須使用：
dataset.append(new_list)
functon，它附加在 new_list 的末尾（這是一個字典，有點令人困惑，注意變量名稱?。?/p>
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