From: Justus Winter <4winter@informatik.uni-hamburg.de> Date: Sun, 22 Jan 2012 13:09:35 +0000 (+0100) Subject: python: fix error handling X-Git-Tag: 0.11.1~6 X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=221c7e0b38177f5f1dbf0561580c15e8aaa49004;p=notmuch.git python: fix error handling Before 3434d1940 the return values of libnotmuch functions were declared as c_void_p and the code checking for errors compared the returned value to None, which is the ctypes equivalent of a NULL pointer. But said commit wrapped all the data types in python classes and the semantic changed in a subtle way. If a function returns NULL, the wrapped python value is falsish, but no longer equal to None. Backported from master to 0.11. --- diff --git a/bindings/python/notmuch/database.py b/bindings/python/notmuch/database.py index 7923f768..0074ba36 100644 --- a/bindings/python/notmuch/database.py +++ b/bindings/python/notmuch/database.py @@ -168,7 +168,7 @@ class Database(object): res = Database._create(_str(path), Database.MODE.READ_WRITE) - if res is None: + if not res: raise NotmuchError( message="Could not create the specified database") self._db = res @@ -188,7 +188,7 @@ class Database(object): """ res = Database._open(_str(path), mode) - if res is None: + if not res: raise NotmuchError(message="Could not open the specified database") self._db = res @@ -645,7 +645,7 @@ class Query(object): self._db = db # create query, return None if too little mem available query_p = Query._create(db.db_p, _str(querystr)) - if query_p is None: + if not query_p: raise NullPointerError self._query = query_p @@ -679,7 +679,7 @@ class Query(object): self._assert_query_is_initialized() threads_p = Query._search_threads(self._query) - if threads_p is None: + if not threads_p: raise NullPointerError return Threads(threads_p, self) @@ -693,7 +693,7 @@ class Query(object): self._assert_query_is_initialized() msgs_p = Query._search_messages(self._query) - if msgs_p is None: + if not msgs_p: raise NullPointerError return Messages(msgs_p, self) @@ -759,7 +759,7 @@ class Directory(object): def _assert_dir_is_initialized(self): """Raises a NotmuchError(:attr:`STATUS`.NOT_INITIALIZED) if dir_p is None""" - if self._dir_p is None: + if not self._dir_p: raise NotmuchError(STATUS.NOT_INITIALIZED) def __init__(self, path, dir_p, parent): @@ -920,7 +920,7 @@ class Filenames(object): _move_to_next.restype = None def next(self): - if self._files_p is None: + if not self._files_p: raise NotmuchError(STATUS.NOT_INITIALIZED) if not self._valid(self._files_p): @@ -946,7 +946,7 @@ class Filenames(object): # NotmuchError(:attr:`STATUS`.NOT_INITIALIZED) for file in files: print file """ - if self._files_p is None: + if not self._files_p: raise NotmuchError(STATUS.NOT_INITIALIZED) i = 0 diff --git a/bindings/python/notmuch/filename.py b/bindings/python/notmuch/filename.py index a7cd7e63..f7313ec5 100644 --- a/bindings/python/notmuch/filename.py +++ b/bindings/python/notmuch/filename.py @@ -69,7 +69,7 @@ class Filenames(object): reference to it, so we can automatically delete the db object once all derived objects are dead. """ - if files_p is None: + if not files_p: raise NotmuchError(STATUS.NULL_POINTER) self._files = files_p diff --git a/bindings/python/notmuch/message.py b/bindings/python/notmuch/message.py index ce8e7181..5540df3e 100644 --- a/bindings/python/notmuch/message.py +++ b/bindings/python/notmuch/message.py @@ -116,7 +116,7 @@ class Messages(object): :TODO: Make the iterator work more than once and cache the tags in the Python object.(?) """ - if msgs_p is None: + if not msgs_p: raise NotmuchError(STATUS.NULL_POINTER) self._msgs = msgs_p @@ -321,7 +321,7 @@ class Message(object): automatically delete the parent object once all derived objects are dead. """ - if msg_p is None: + if not msg_p: raise NotmuchError(STATUS.NULL_POINTER) self._msg = msg_p #keep reference to parent, so we keep it alive @@ -380,7 +380,7 @@ class Message(object): msgs_p = Message._get_replies(self._msg) - if msgs_p is None: + if not msgs_p: return None return Messages(msgs_p, self) diff --git a/bindings/python/notmuch/tag.py b/bindings/python/notmuch/tag.py index 2fb7d328..4881db9f 100644 --- a/bindings/python/notmuch/tag.py +++ b/bindings/python/notmuch/tag.py @@ -70,7 +70,7 @@ class Tags(object): :TODO: Make the iterator optionally work more than once by cache the tags in the Python object(?) """ - if tags_p is None: + if not tags_p: raise NotmuchError(STATUS.NULL_POINTER) self._tags = tags_p diff --git a/bindings/python/notmuch/thread.py b/bindings/python/notmuch/thread.py index 5058846d..594fa522 100644 --- a/bindings/python/notmuch/thread.py +++ b/bindings/python/notmuch/thread.py @@ -97,7 +97,7 @@ class Threads(object): :TODO: Make the iterator work more than once and cache the tags in the Python object.(?) """ - if threads_p is None: + if not threads_p: raise NotmuchError(STATUS.NULL_POINTER) self._threads = threads_p @@ -227,7 +227,7 @@ class Thread(object): automatically delete the parent object once all derived objects are dead. """ - if thread_p is None: + if not thread_p: raise NotmuchError(STATUS.NULL_POINTER) self._thread = thread_p #keep reference to parent, so we keep it alive @@ -288,7 +288,7 @@ class Thread(object): msgs_p = Thread._get_toplevel_messages(self._thread) - if msgs_p is None: + if not msgs_p: raise NotmuchError(STATUS.NULL_POINTER) return Messages(msgs_p, self)