'Nonetype' 对象不可下标 - 从 Outlook API 提取

Question

我有一些代码可以直接连接到 Outlook 并从收件箱中提取元数据，然后编译成 pandas。但是，我似乎遇到了一个以前从未遇到过的错误，我怀疑它与 Outlook 提取中的错误数据（即电子邮件中的空白数据）有关。但我似乎无法隔离。有人见过这个吗？

ERROR:app:Exception on /ctplive [GET]
Traceback (most recent call last):
  File "c:\programdata\anaconda\lib\site-packages\flask\app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "c:\programdata\anaconda\lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "c:\programdata\anaconda\lib\site-packages\flask_cors\extension.py", line 165, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "c:\programdata\anaconda\lib\site-packages\flask\app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "c:\programdata\anaconda\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "c:\programdata\anaconda\lib\site-packages\flask\app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "c:\programdata\anaconda\lib\site-packages\flask\app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\ADM\Code Projects\web_data_connector\outlook_api\app.py", line 100, in mailbox_insights
    inbox['Conversation Length'] = determine_conversation_length(inbox['ConversationIndex'], archive['ConversationIndex']).astype(int).values
  File "c:\users\adm\code projects\ccf_email_automation\ccf_email_automation\insights.py", line 92, in determine_conversation_length
    res[index] = len([x[:len(index)] for x in list(inbox_index) + list(archive_index) if x[:len(index)] == index])
  File "c:\users\adm\code projects\ccf_email_automation\ccf_email_automation\insights.py", line 92, in <listcomp>
    res[index] = len([x[:len(index)] for x in list(inbox_index) + list(archive_index) if x[:len(index)] == index])
TypeError: 'NoneType' object is not subscriptable

这是来自 app.py 的块

    if mailbox not in ['ctp', 'csu', 'dmt']:
        return 404
    archive, inbox = get_emails(mailbox, get_outlook())
    inbox['Sender'] = inbox[['SenderName', 'SenderEmailAddress']].apply(lambda x: read_email_address(*x), axis=1)
    inbox['Sender Domain'] = inbox['SenderEmailAddress'].apply(lambda x: x[x.index('@') + 1:] if '@' in x else 'gilead.com')
    inbox['TABL_Highest Volume Senders'] = top_senders(inbox)
    inbox['TABL_Highest Volume Sender Domains'] = top_sender_domains(inbox)
    *************line 100 starts here**************
    inbox['Conversation Length'] = determine_conversation_length(inbox['ConversationIndex'], archive['ConversationIndex']).astype(int).values
    inbox['TABL_Longest Conversations'] = longest_conversations(inbox['Conversation Length'])
    holiday_list = get_holidays()
    inbox['Business Day SLA'] = inbox[['Received Date', 'Flag Completed Date']].apply(lambda x: calculate_sla(*x, holiday_list=holiday_list), axis=1)
    inbox['Team Member'] = hardcode_team_member(inbox, mailbox)
    inbox['Sentiment Score'] = determine_sentiment(inbox['Body'])
    inbox['Flag Status'] = inbox[['Flag Completed Date', 'FlagRequest']].apply(lambda x: flag_status(*x), axis=1)
    inbox['Complexity'] = inbox['Categories'].str.extract(r'Complexity Level (\d)').astype(float)
    inbox['Protocol'] = inbox.pipe(identify_first_protocol)
    inbox['Speed to Market'] = inbox['Categories'].str.contains('Speed to Market')
    return inbox.rename(columns=lambda x: x.replace(' ', '_')).drop(columns=['ConversationIndex']).to_json(), 200

这是来自insights.py的块：

    res = pd.Series(index=inbox_index, dtype='object')
    for index in tqdm(inbox_index):
    *******Line 92 starts here********
        res[index] = len([x[:len(index)] for x in list(inbox_index) + list(archive_index) if x[:len(index)] == index])
    return res

Answer 1

通常，在使用 API 时，建议使用if statements，因为您可能不确定会返回什么。也许您可以尝试检查inbox 和res 是什么类型，因此您的代码可能如下所示：

对于insights.py

res = pd.Series(index=inbox_index, dtype='object')
if res: # Check if res actually has a value before subscribing to it with res[key]
    for index in tqdm(inbox_index):
    *******Line 92 starts here********
        res[index] = len([x[:len(index)] for x in list(inbox_index) + list(archive_index) if x[:len(index)] == index])
        return res

那么你不妨在使用inbox 变量之前对app.py 执行相同的操作，或者在访问数据点之前使用一堆if statements 检查然后处理错误，如果某些东西是类型@ 987654328@.