email.message.Message - as_string fails

[Chris Rebert]

On Dec 28, 2012 4:26 AM, "Helmut Jarausch" <jarausch at igpm.rwth-aachen.de>
wrote:
>
> Hi,
>
> I'm trying to filter an mbox file by removing some messages.
> For that I use
> Parser= FeedParser(policy=policy.SMTP)
> and 'feed' any lines to it.
> If the mbox file contains a white line followed by '^From ',
> I do
>
> Msg= Parser.close()
>
> (lateron I delete the Parser and create a new one by
> Parser= FeedParser(policy=policy.SMTP)
> )
>
> I can access parts of the message by  Msg['Message-ID'], e.g.
> but even for the very first message, trying to print it or convert it to
a string
> by  MsgStr=Msg.as_string(unixfrom=True)
>
> lets Python (3.3.1_pre20121209) die with
>
> Traceback (most recent call last):
>   File "Email_Parse.py", line 35, in <module>
>     MsgStr=Msg.as_string(unixfrom=True)
>   File "/usr/lib64/python3.3/email/message.py", line 151, in as_string
>     g.flatten(self, unixfrom=unixfrom)
>   File "/usr/lib64/python3.3/email/generator.py", line 112, in flatten
>     self._write(msg)
>   File "/usr/lib64/python3.3/email/generator.py", line 171, in _write
>     self._write_headers(msg)
>   File "/usr/lib64/python3.3/email/generator.py", line 198, in
_write_headers
>     self.write(self.policy.fold(h, v))
>   File "/usr/lib64/python3.3/email/policy.py", line 153, in fold
>     return self._fold(name, value, refold_binary=True)
>   File "/usr/lib64/python3.3/email/policy.py", line 176, in _fold
>     (len(lines[0])+len(name)+2 > maxlen or
> IndexError: list index out of range
>
>
> What am I missing?

Perhaps the message is malformed. What does Msg.defects give you?

Could you post the line strings you fed to the parser that together
constitute the first message (redacted if necessary)?

P.S. Your naming conventions (with respect to capitalization) disagree with
those of Python.
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