python: fix error handling

[notmuch] / bindings / python / notmuch / database.py

diff --git a/bindings/python/notmuch/database.py b/bindings/python/notmuch/database.py
index f17951510b88a539f9dfa5bb5437beb51e7d0fc6..0074ba36b2fc7995cddbd3a81af0e4e8c39b087d 100644 (file)
--- a/bindings/python/notmuch/database.py
+++ b/bindings/python/notmuch/database.py
@@ -18,9 +18,9 @@ Copyright 2010 Sebastian Spaeth <Sebastian@SSpaeth.de>'
 """
 
 import os
-from ctypes import c_int, c_char_p, c_void_p, c_uint, c_long, byref, POINTER
+from ctypes import c_char_p, c_void_p, c_uint, c_long, byref, POINTER
 from notmuch.globals import (nmlib, STATUS, NotmuchError, NotInitializedError,
-     NullPointerError, OutOfMemoryError, XapianError, Enum, _str,
+     NullPointerError, Enum, _str,
      NotmuchDatabaseP, NotmuchDirectoryP, NotmuchMessageP, NotmuchTagsP,
      NotmuchQueryP, NotmuchMessagesP, NotmuchThreadsP, NotmuchFilenamesP)
 from notmuch.thread import Threads
@@ -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
 
@@ -385,7 +385,7 @@ class Database(object):
                       be added.
         """
         self._assert_db_is_initialized()
-        msg_p = c_void_p()
+        msg_p = NotmuchMessageP()
         status = self._add_message(self._db, _str(filename), byref(msg_p))
 
         if not status in [STATUS.SUCCESS, STATUS.DUPLICATE_MESSAGE_ID]:
@@ -453,7 +453,7 @@ class Database(object):
                     the database was not intitialized.
         """
         self._assert_db_is_initialized()
-        msg_p = c_void_p()
+        msg_p = NotmuchMessageP()
         status = Database._find_message(self._db, _str(msgid), byref(msg_p))
         if status != STATUS.SUCCESS:
             raise NotmuchError(status)
@@ -487,7 +487,7 @@ class Database(object):
 
         *Added in notmuch 0.9*"""
         self._assert_db_is_initialized()
-        msg_p = c_void_p()
+        msg_p = NotmuchMessageP()
         status = Database._find_message_by_filename(self._db, _str(filename),
                                                     byref(msg_p))
         if status != STATUS.SUCCESS:
@@ -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