Python3.3 email policy date field

Thu Aug 23 04:30:05 EDT 2012

Hi,
in response to a bug report I got the follow helpful comments from R. David Murray.
Many thanks to him. (Unfortunately, I don't know his email, so I can write him directly)
To generate an email (with non-ascii letters)
R. David Murray wrote:
>>> But even better, so will this:

>>> m = Message(policy=policy.SMTP)
>>> m['From'] = "Günter Weiße <jarausch at igpm.rwth-aachen.de>"

This works, but now I cannot add a date field
Trying
m['Date'] = datetime.datetime.utcnow().strftime('%m/%d/%Y %I:%M:%S %p')
I get
Traceback (most recent call last):
 File "Test_EMail_Py3_4.py", line 23, in <module>
 msg['Date'] = datetime.datetime.utcnow().strftime('%m/%d/%Y %I:%M:%S %p')
 File "/usr/lib64/python3.3/email/message.py", line 359, in __setitem__
 self._headers.append(self.policy.header_store_parse(name, val))
 File "/usr/lib64/python3.3/email/policy.py", line 119, in header_store_parse
 return (name, self.header_factory(name, value))
 File "/usr/lib64/python3.3/email/headerregistry.py", line 583, in __call__
 return self[name](name, value)
 File "/usr/lib64/python3.3/email/headerregistry.py", line 194, in __new__
 cls.parse(value, kwds)
 File "/usr/lib64/python3.3/email/headerregistry.py", line 300, in parse
 value = utils.parsedate_to_datetime(value)
 File "/usr/lib64/python3.3/email/utils.py", line 243, in parsedate_to_datetime
 *dtuple, tz = __parsedate_tz(data)
TypeError: 'NoneType' object is not iterable
Many thanks for a hint,
Helmut.