scrapy sending mail got an ERROR: Unable to send mail. object of type 'module' has no len() - email

Question

I wanna send email when spider closed, code is like this:
def close(spider, reason):
# mailer = MailSender.from_settings(self.settings)
from scrapy.mail import MailSender
mailer = MailSender(
smtphost="smtp.163.com",
mailfrom="rhys***#163.com",
smtpuser="rhys***g#163.com",
smtppass="***",
smtpport=25
)
body = u"""
content
"""
subject = u'title'
mailer.send(to=["rhys***#qq.com"],
subject=subject.encode("utf-8"),
body=body.encode("utf-8"),
cc=['12202012**#qq.com'])
But I got an error like this:
[twisted] CRITICAL: Unhandled Error
Traceback (most recent call last):
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/python/log.py", line 103, in callWithLogger
return callWithContext({"system": lp}, func, *args, **kw)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/python/log.py", line 86, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/python/context.py", line 122, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/python/context.py", line 85, in callWithContext
return func(*args,**kw)
--- <exception caught here> ---
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/internet/posixbase.py", line 597, in _doReadOrWrite
why = selectable.doRead()
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/internet/tcp.py", line 208, in doRead
return self._dataReceived(data)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/internet/tcp.py", line 214, in _dataReceived
packages/twisted/internet/tcp.py", line 214, in _dataReceived
rval = self.protocol.dataReceived(data)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/protocols/tls.py", line 330, in dataReceived
self._flushReceiveBIO()
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/protocols/tls.py", line 295, in _flushReceiveBIO
ProtocolWrapper.dataReceived(self, bytes)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/protocols/policies.py", line 120, in dataReceived
self.wrappedProtocol.dataReceived(data)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/protocols/basic.py", line 571, in dataReceived
why = self.lineReceived(line)
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/mail/smtp.py", line 995, in lineReceived
why = self._okresponse(self.code, b'\n'.join(self.resp))
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/mail/smtp.py", line 1044, in smtpState_to
return self.smtpState_toOrData(0, b'')
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/mail/smtp.py", line 1062, in smtpState_toOrData
self.sendLine(b'RCPT TO:' + quoteaddr(self.lastAddress))
File "/home/rhys/.pyenv/versions/2.7.5/envs/p2spider/lib/python2.7/site-
packages/twisted/mail/smtp.py", line 179, in quoteaddr
res = email.utils.parseaddr(addr)
File "/home/rhys/.pyenv/versions/2.7.5/lib/python2.7/email/utils.py", li
ne 215, in parseaddr
addrs = _AddressList(addr).addresslist
File "/home/rhys/.pyenv/versions/2.7.5/lib/python2.7/email/_parseaddr.py
", line 457, in __init__
self.addresslist = self.getaddrlist()
File "/home/rhys/.pyenv/versions/2.7.5/lib/python2.7/email/_parseaddr.py
", line 217, in getaddrlist
while self.pos < len(self.field):
exceptions.TypeError: object of type 'module' has no len()
anybody can explain why?
I use python2.7 and scapy1.4. if I comment the code mentioned above everything is just ok
thanks

Answer 1

I bumped to twisted 17.9 and the problem went away.