New submission from Tim Chase:
If a mailbox.MH() object is created by pointing at a path that exists but
doesn't contain a ".mh_sequences" file, it raises an exception upon iteration
over .{iter,}items() rather than gracefully assuming that the file is empty. I
encountered this by pointing it at a Claws Mail IMAP-cache folder (which claims
to store its messages in MH format¹ but it doesn't place a .mh_sequences file
in those folders) only to have it raise an exception.
To replicate:
$ mkdir empty
$ python
>>> import mailbox
>>> for msg in mailbox.MH('empty').values(): pass
I suspect this could simply wrap the "f = open(os.path.join(self._path,
'.mh_sequences'), 'r')" and following lines in a check to ignore the file if it
doesn't exist (returning the empty "results").
¹
http://www.claws-mail.org/faq/index.php/General_Information#How_does_Claws_Mail_store_mails.3F
----------
components: Library (Lib)
messages: 226197
nosy: gumnos
priority: normal
severity: normal
status: open
title: mailbox.MH chokes on directories without .mh_sequences
type: behavior
versions: Python 2.7, Python 3.1, Python 3.2
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<http://bugs.python.org/issue22319>
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