我试图同时从json数据中获取两个属性，并将它们作为项目添加到我的python列表中。但是，当尝试添加这两个时：['emailTypeDesc']['createdDate']它将引发错误。有人可以帮忙吗？提前致谢！

json：

{

'readOnly': False,

'senderDetails': {'firstName': 'John', 'lastName': 'Doe', 'emailAddress': 'johndoe@gmail.com', 'emailAddressId': 123456, 'personalId': 123, 'companyName': 'ACME‘},

'clientDetails': {'firstName': 'Jane', 'lastName': 'Doe', 'emailAddress': 'janedoe@gmail.com', 'emailAddressId': 654321, 'personalId': 456, 'companyName': 'Lorem Ipsum‘}},

'notesSection': {},

'emailList': [{'requestId': 12345667, 'emailId': 9876543211, 'emailType': 3, 'emailTypeDesc': 'Email-In', 'emailTitle': 'SampleTitle 1', 'createdDate': '15-May-2020 11:15:52', 'fromMailList': [{'firstName': 'Jane', 'lastName': 'Doe', 'emailAddress': 'janedoe@gmail.com',}]},

{'requestId': 12345667, 'emailId': 14567775, 'emailType': 3, 'emailTypeDesc': 'Email-Out', 'emailTitle': 'SampleTitle 2', 'createdDate': '16-May-2020 16:15:52', 'fromMailList': [{'firstName': 'Jane', 'lastName': 'Doe', 'emailAddress': 'janedoe@gmail.com',}]},

{'requestId': 12345667, 'emailId': 12345, 'emailType': 3, 'emailTypeDesc': 'Email-In', 'emailTitle': 'SampleTitle 3', 'createdDate': '17-May-2020 20:15:52', 'fromMailList': [{'firstName': 'Jane', 'lastName': 'Doe', 'emailAddress': 'janedoe@gmail.com',}]

}

蟒蛇：

final_list = []

data = json.loads(r.text)

myId = [(data['emailList'][0]['requestId'])]

for each_req in myId:

final_list.append(each_req)

myEmailList = [mails['emailTypeDesc']['createdDate'] for mails in data['emailList']]

for each_requ in myEmailList:

final_list.append(each_requ)

return final_list

当我运行上面的代码时出现此错误：

TypeError: string indices must be integers

所需的输出final_list：

[12345667, 'Email-In', '15-May-2020 11:15:52', 'Email-Out', '16-May-2020 16:15:52', 'Email-In', '17-May-2020 20:15:52']

我的问题明确地在这一行：

myEmailList = [mails['emailTypeDesc']['createdDate'] for mails in data['emailList']]

因为当我在没有第二个属性的情况下运行['createdDate']它时，它可以工作，但是我需要在我的两个属性上final_list：

myEmailList = [mails['emailTypeDesc'] for mails in data['emailList']]

解决方案

我认为您对语法有误解。mails['emailTypeDesc']['createdDate']正在寻找对象'createdDate' 内的键mails['emailTypeDesc']，但实际上它们是同一级别的两项。

由于mails['emailTypeDesc']是字符串，而不是字典，因此您会得到引用的错误。看来你要添加的两个项目mails['emailTypeDesc']，并mails['createdDate']到您的列表。我不确定是要将它们合并成一个字符串还是创建一个子列表或其他内容。这是一个子列表选项。

myEmailList = [[mails['emailTypeDesc'], mails['createdDate']] for mails in data['emailList']]