Python 错误“TypeError：得到了意外的关键字参数‘attachmentId’”

Question

我正在尝试使用他们的 API 从 gmail 的电子邮件中提取附件，并且在尝试插入变量时遇到了意外的关键字参数。我非常习惯 Javascript，所以这可能就是我遇到此错误并出错的原因，但这里是相关的代码块：

def main():

    credentials = get_credentials()
    gsa = gspread.authorize(credentials)
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('gmail', 'v1', http=http)

    query = ['plc/trending/31day']

    for x in query:

        results = service.users().messages().list(userId='me', labelIds=None, q='label:' + x, pageToken=None, maxResults=1, includeSpamTrash=None).execute()
        mesgid = results['messages'][0]['id']
        attresults = service.users().messages().get(userId='me', id=mesgid, format=None, metadataHeaders=None).execute()
        attid = attresults['payload']['parts'][1]['body']['attachmentId']
        grabattachment = service.users().messages().attachments().get(userId='me', messageId = mesgid, attachmentId = attid)

Answer 1

official documentation 表明附件的 id 名为 id，而不是 attachmentId：

grabattachment = service.users().messages().attachments().get(userId='me', messageId = mesgid, id = attid)

您可能希望缓存 service.users().messages() 和更深层次的调用，例如 .attachments()，并避免每次都调用这么多对象：

messages = service.users().messages()
for x in query:
    results = messages.list(
        userId='me', labelIds=None, q='label:' + x, 
        pageToken=None, maxResults=1, 
        includeSpamTrash=None).execute()
    mesgid = results['messages'][0]['id']
    attresults = messages.get(
        userId='me', id=mesgid, format=None, 
        metadataHeaders=None).execute()
    attid = attresults['payload']['parts'][1]['body']['attachmentId']
    grabattachment = messages.attachments().get(
        userId='me', messageId=mesgid,
        attachmentId=attid)

我还强烈怀疑您最后错过了.execute() 电话。

我也觉得messages.list() 调用已经包含足够的信息来检索附件，而无需单独的messages.get() 调用：

messages = service.users().messages()
for x in query:
    results = messages.list(
        userId='me', labelIds=None, q='label:' + x, 
        pageToken=None, maxResults=1, 
        includeSpamTrash=None).execute()
    attid = results['messages'][0]['payload']['parts'][1]['body']['attachmentId']
    grabattachment = messages.attachments().get(
        userId='me', messageId=mesgid,
        attachmentId=attid).execute()

就个人而言，我仍然会测试多个附件，在加载附件数据之前检查每个附件是否有文件名。