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From: Mark Lawrence <breamoreboy@yahoo.co.uk>
Subject: Re: how to get the subject of email?
Date: Sun, 10 Aug 2014 11:28:06 +0100
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On 10/08/2014 02:41, luofeiyu wrote:
> I am in python3.4
>
> typ, data = x.con.fetch(b'1', '(RFC822)')   #get  the first email
> text = data[0][1]
> message = email.message_from_string(text).get('subject')
>
> Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
>    File "D:\Python34\lib\email\__init__.py", line 40, in
> message_from_string
>      return Parser(*args, **kws).parsestr(s)
>    File "D:\Python34\lib\email\parser.py", line 70, in parsestr
>      return self.parse(StringIO(text), headersonly=headersonly)
> TypeError: initial_value must be str or None, not bytes
>
> message = email.message_from_string(str(text)).get('subject')
> message  # nothing displayed

Could the answer to your numerous questions be in the docs, in this case 
https://docs.python.org/3/library/email.html ?

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence