TypeError Exception in email lib

BJ Swope bigblueswope at gmail.com
Mon Feb 15 20:54:16 CET 2010

On Mon, Feb 15, 2010 at 2:47 PM, BJ Swope <bigblueswope at gmail.com> wrote:
> On Mon, Feb 15, 2010 at 2:31 PM, Stephen Hansen <apt.shansen at gmail.com> wrote:
>> On Mon, Feb 15, 2010 at 10:53 AM, BJ Swope <bigblueswope at gmail.com> wrote:
>>>  File "/usr/lib/python2.5/email/_parseaddr.py", line 142, in mktime_tz
>>>    if data[9] is None:
>>> TypeError: 'NoneType' object is unsubscriptable
>>> I'm parsing a bunch of spam and using the date field from the spams
>>> for a date-time stamp.
>>> I've fixed the lib on my box to place the call inside a try/except
>>> clause to catch the exception now, but it seems the module has a bug
>>> in it.
>> While there may or may not be a bug in the library, I don't think its where
>> you're fixing. Just because an exception occurs in a function doesn't mean
>> that function is broken: its documented as accepting a 10 item tuple, only.
>> Functions in the stdlib generally -should- throw exceptions on invalid
>> input.
>> Someone's passing None into it, which its not allowed to do. So -that's-
>> where the bug probably is, I think. (Although it may not be the immediate of
>> mktime_tz; it could be happening higher up on the stack)
>> Advice: Always post complete tracebacks to c.p.l/python-list :)
>> --S
> From the module:
> def mktime_tz(data):
>    """Turn a 10-tuple as returned by parsedate_tz() into a UTC timestamp."""
>    if data[9] is None:
>       # No zone info, so localtime is better assumption than GMT
>       return time.mktime(data[:8] + (-1,))
>    else:
>        t = time.mktime(data[:8] + (0,))
>        return t - data[9] - time.timezone
> It appears that the module is trying to accommodate the potential
> missing TZ data because poorly written emails are missing the TZ data.
> I discarded all the crontab emails that had the full traceback in
> them.  I took out the try/except clause in the hopes that I'll get
> another exception soon.
> If I do I'll post the entire exception traceback.

Speak of the devil and demons appear...


Parsing of emails for spam at serv1.bigbluenetworks.com failed.

Traceback (most recent call last):
  File "/logs/python/imap_fetcher/spam_serv1.bigbluenetworks.com.py",
line 81, in <module>
  File "/logs/python/imap_fetcher/spam_serv1.bigbluenetworks.com.py",
line 24, in clean_stale_mail
    utc_msg_date = email.utils.mktime_tz(msg_date2)
  File "/usr/lib/python2.5/email/_parseaddr.py", line 142, in mktime_tz
    if data[9] is None:
TypeError: 'NoneType' object is unsubscriptable

def clean_stale_mail():
    msg_date1= the_email.get('Date')
    msg_date2 = email.utils.parsedate_tz(msg_date1)
        utc_msg_date = email.utils.mktime_tz(msg_date2)
    except OverflowError:
        M.store(msg_id, '+FLAGS.SILENT', '\\Deleted')
    utc_stale_date = time.time() - (86000*stale_days)
    if utc_msg_date <= utc_stale_date:
        M.store(msg_id, '+FLAGS.SILENT', '\\Deleted')

    #M = imaplib.IMAP4(HOST)
    M = imaplib.IMAP4_SSL(HOST)
    M.login(USER, PASSWD)

    response, msg_list = M.search(None, 'ALL') # response is IMAP
response, msg_list is list of Message IDs

    for msg_id in msg_list[0].split(): #msg_list[0] is a space
separated string of message ids
        response, message = M.fetch(msg_id, '(RFC822)') # response is
the IMAP response, message is an RFC222 message

        msg = email.FeedParser.FeedParser( )
        the_email = msg.close()


        if the_email.is_multipart():
            for part in the_email.walk():
                if part.get_content_type() == 'text/html':
                    decoded_part = part.get_payload(decode=1)
        elif the_email.get_content_type() == 'text/html':
            decoded_part = the_email.get_payload(decode=1)
        elif the_email.get_content_type() == 'text/plain':
            msg_payload = the_email.get_payload()
            #print msg_id, "Did't match any defined content types..."
            #print the_email

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