MIMEText breaking the rules?

[dale at riverhall.nospam.co.uk (Dale Strickland-Clark)]

The email module's mimetext handling isn't what you might expect from
something that appears to behave like a dictionary.

$ python
Python 2.5 (r25:51908, May 25 2007, 16:14:04)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from email.mime.text import MIMEText
>>> msg = MIMEText("A message")
>>> msg["To"] = "recipient at myhost.com"
>>> msg["To"] = "other_recipient at myhost.com"
>>> print msg.as_string()
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
To: recipient at myhost.com
To: other_recipient at myhost.com

A message
>>>

Having apparently REPLACED my recipient, what I've ended up with is both of
them.

-- 
Dale Strickland-Clark
Riverhall Systems - www.riverhall.co.uk