Bug in email package?

[Roman Suzi]

I was playing with email package and discovrered this strange kind of 
behaviour:

>>> import email.Message
>>> m = email.Message.Message()
>>> m['a'] = '123'
>>> print m
>From nobody Mon Feb 21 00:12:27 2005
a: 123


>>> for i in m: print i
...
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/local/lib/python2.3/email/Message.py", line 304, in __getitem__
     return self.get(name)
   File "/usr/local/lib/python2.3/email/Message.py", line 370, in get
     name = name.lower()
AttributeError: 'int' object has no attribute 'lower'


I think that if any object (from standard library at least) doesn't support
iteration, it should clearly state so.

My guess is that 'for' causes the use of 'm[0]', which is (rightfully) an 
error...

Can this behaviour of email be considered a bug?
Is there a good case to iterate over something useful in a message?

P.S. rfc822 has the same behaviour, at least on Python 2.3


Sincerely yours, Roman Suzi
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