[Email-SIG] Just give me the decoded header?

[Mark Sapiro]

Nando wrote:
> 
> Sometimes, for things more or less like this, I just feel like 
> *subclassing* Message. But I can't. The MIME parser is wired to create 
> Messages. I don't think I can tell it to create a MyMessageSubclass. 
> This also happens with the convenience function 
> email.message_from_file(f). It creates a Message. I *think* I could make 
> it into a class method of Message, then I would be able to call 
> MyMessage.from_file(). Is this idea -- making things more 
> object-oriented -- interesting for you?

You can do this now, albeit somewhat differently. See the _class 
argument at <http://docs.python.org/lib/node149.html> and the _factory 
argument at <http://docs.python.org/lib/node148.html>.

e.g. if your mymessage module defines a MyMessage class as a sub class 
of email.message.Message, you can do

import email
import mymessage

f = open('/path/to/message/file')

msg = email.message_from_file(f, mymessage.MyMessage)


to create a MyMessage instance. You can also do

import email
import mymessage

p = email.parser.Parser(mymessage.MyMessage)

to create a parser which will create MyMessage instances.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan