From 8015cbff263606f009b5750d23b28ee332c25db8 Mon Sep 17 00:00:00 2001 From: Justus Winter <4winter@informatik.uni-hamburg.de> Date: Sun, 22 Jan 2012 06:14:57 +0100 Subject: [PATCH] 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. --- bindings/python/notmuch/database.py | 16 ++++++++-------- bindings/python/notmuch/filename.py | 2 +- bindings/python/notmuch/message.py | 6 +++--- bindings/python/notmuch/tag.py | 2 +- bindings/python/notmuch/thread.py | 6 +++--- 5 files changed, 16 insertions(+), 16 deletions(-) diff --git a/bindings/python/notmuch/database.py b/bindings/python/notmuch/database.py index 24da8e99..6238b289 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 @@ -651,7 +651,7 @@ 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 @@ -685,7 +685,7 @@ 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) @@ -699,7 +699,7 @@ 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) @@ -765,7 +765,7 @@ 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): @@ -926,7 +926,7 @@ 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): @@ -953,7 +953,7 @@ 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 51dae202..3f541046 100644 --- a/bindings/python/notmuch/filename.py +++ b/bindings/python/notmuch/filename.py @@ -69,7 +69,7 @@ class Filenames(Python3StringMixIn): 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 d40a575d..883ed233 100644 --- a/bindings/python/notmuch/message.py +++ b/bindings/python/notmuch/message.py @@ -117,7 +117,7 @@ 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 @@ -349,7 +349,7 @@ class Message(Python3StringMixIn): 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 @@ -407,7 +407,7 @@ class Message(Python3StringMixIn): msgs_p = Message._get_replies(self._msg) - if msgs_p is None: + if not msgs_p: return EmptyMessagesResult(self) return Messages(msgs_p, self) diff --git a/bindings/python/notmuch/tag.py b/bindings/python/notmuch/tag.py index ceb72441..71d81dd6 100644 --- a/bindings/python/notmuch/tag.py +++ b/bindings/python/notmuch/tag.py @@ -70,7 +70,7 @@ class Tags(Python3StringMixIn): :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 e81ff1bd..104710c4 100644 --- a/bindings/python/notmuch/thread.py +++ b/bindings/python/notmuch/thread.py @@ -97,7 +97,7 @@ class Threads(Python3StringMixIn): :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 @@ -228,7 +228,7 @@ 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 @@ -289,7 +289,7 @@ 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) -- 2.26.2