diff options
Diffstat (limited to 'bindings/python/notmuch/thread.py')
| -rw-r--r-- | bindings/python/notmuch/thread.py | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/bindings/python/notmuch/thread.py b/bindings/python/notmuch/thread.py index c599bcbf..0dac522c 100644 --- a/bindings/python/notmuch/thread.py +++ b/bindings/python/notmuch/thread.py @@ -20,11 +20,9 @@ Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>' from ctypes import c_char_p, c_long, c_int from notmuch.globals import ( nmlib, - Python3StringMixIn, NullPointerError, NotInitializedError, NotmuchThreadP, - NotmuchThreadsP, NotmuchMessagesP, NotmuchTagsP, ) @@ -32,158 +30,6 @@ from .messages import Messages from notmuch.tag import Tags from datetime import date - -class Threads(Python3StringMixIn): - """Represents a list of notmuch threads - - This object provides an iterator over a list of notmuch threads - (Technically, it provides a wrapper for the underlying - *notmuch_threads_t* structure). Do note that the underlying - library only provides a one-time iterator (it cannot reset the - iterator to the start). Thus iterating over the function will - "exhaust" the list of threads, and a subsequent iteration attempt - will raise a :exc:`NotInitializedError`. Also - note, that any function that uses iteration will also - exhaust the messages. So both:: - - for thread in threads: print thread - - as well as:: - - number_of_msgs = len(threads) - - will "exhaust" the threads. If you need to re-iterate over a list of - messages you will need to retrieve a new :class:`Threads` object. - - Things are not as bad as it seems though, you can store and reuse - the single Thread objects as often as you want as long as you - keep the parent Threads object around. (Recall that due to - hierarchical memory allocation, all derived Threads objects will - be invalid when we delete the parent Threads() object, even if it - was already "exhausted".) So this works:: - - db = Database() - threads = Query(db,'').search_threads() #get a Threads() object - threadlist = [] - for thread in threads: - threadlist.append(thread) - - # threads is "exhausted" now and even len(threads) will raise an - # exception. - # However it will be kept around until all retrieved Thread() objects are - # also deleted. If you did e.g. an explicit del(threads) here, the - # following lines would fail. - - # You can reiterate over *threadlist* however as often as you want. - # It is simply a list with Thread objects. - - print (threadlist[0].get_thread_id()) - print (threadlist[1].get_thread_id()) - print (threadlist[0].get_total_messages()) - """ - - #notmuch_threads_get - _get = nmlib.notmuch_threads_get - _get.argtypes = [NotmuchThreadsP] - _get.restype = NotmuchThreadP - - def __init__(self, threads_p, parent=None): - """ - :param threads_p: A pointer to an underlying *notmuch_threads_t* - structure. These are not publically exposed, so a user - will almost never instantiate a :class:`Threads` object - herself. They are usually handed back as a result, - e.g. in :meth:`Query.search_threads`. *threads_p* must be - valid, we will raise an :exc:`NullPointerError` if it is - `None`. - :type threads_p: :class:`ctypes.c_void_p` - :param parent: The parent object - (ie :class:`Query`) these tags are derived from. It saves - a reference to it, so we can automatically delete the db - object once all derived objects are dead. - :TODO: Make the iterator work more than once and cache the tags in - the Python object.(?) - """ - if not threads_p: - raise NullPointerError() - - self._threads = threads_p - #store parent, so we keep them alive as long as self is alive - self._parent = parent - - def __iter__(self): - """ Make Threads an iterator """ - return self - - _valid = nmlib.notmuch_threads_valid - _valid.argtypes = [NotmuchThreadsP] - _valid.restype = bool - - _move_to_next = nmlib.notmuch_threads_move_to_next - _move_to_next.argtypes = [NotmuchThreadsP] - _move_to_next.restype = None - - def __next__(self): - if not self._threads: - raise NotInitializedError() - - if not self._valid(self._threads): - self._threads = None - raise StopIteration - - thread = Thread(Threads._get(self._threads), self) - self._move_to_next(self._threads) - return thread - next = __next__ # python2.x iterator protocol compatibility - - def __len__(self): - """len(:class:`Threads`) returns the number of contained Threads - - .. note:: As this iterates over the threads, we will not be able to - iterate over them again! So this will fail:: - - #THIS FAILS - threads = Database().create_query('').search_threads() - if len(threads) > 0: #this 'exhausts' threads - # next line raises :exc:`NotInitializedError`!!! - for thread in threads: print thread - """ - if not self._threads: - raise NotInitializedError() - - i = 0 - # returns 'bool'. On out-of-memory it returns None - while self._valid(self._threads): - self._move_to_next(self._threads) - i += 1 - # reset self._threads to mark as "exhausted" - self._threads = None - return i - - def __nonzero__(self): - """Check if :class:`Threads` contains at least one more valid thread - - The existence of this function makes 'if Threads: foo' work, as - that will implicitely call len() exhausting the iterator if - __nonzero__ does not exist. This function makes `bool(Threads())` - work repeatedly. - - :return: True if there is at least one more thread in the - Iterator, False if not. None on a "Out-of-memory" error. - """ - return self._threads is not None and \ - self._valid(self._threads) > 0 - - _destroy = nmlib.notmuch_threads_destroy - _destroy.argtypes = [NotmuchThreadsP] - _destroy.argtypes = None - - def __del__(self): - """Close and free the notmuch Threads""" - if self._threads is not None: - self._destroy(self._threads) - - class Thread(object): """Represents a single message thread.""" |