Use itertools ifilter and imap to simplify some operations

svn: r15480

src/gen/proxy/filter.py

@@ -25,6 +25,14 @@
 """
 Proxy class for the GRAMPS databases. Apply filter
 """
+
+#-------------------------------------------------------------------------
+#
+# Python libraries
+#
+#-------------------------------------------------------------------------
+from itertools import imap
+
 #-------------------------------------------------------------------------
 #
 # GRAMPS libraries
@@ -313,8 +321,7 @@ class FilterProxyDb(ProxyDbBase):
         """
         Return an iterator over objects for Persons in the database
         """
-        for handle in self.plist:
-            yield self.get_person_from_handle(handle)
+        return imap(self.get_person_from_handle, self.plist)
 
     def get_event_handles(self):
         """
@@ -325,11 +332,17 @@ class FilterProxyDb(ProxyDbBase):
         
     def iter_event_handles(self):
         """
-        Return an iterator over database handles, one handle for each Person in
+        Return an iterator over database handles, one handle for each Event in
         the database. 
         """
         return self.elist
 
+    def iter_events(self):
+        """
+        Return an iterator over objects for Events in the database
+        """
+        return imap(self.get_event_from_handle, self.elist)
+
     def get_family_handles(self):
         """
         Return a list of database handles, one handle for each Family in
@@ -339,11 +352,17 @@ class FilterProxyDb(ProxyDbBase):
         
     def iter_family_handles(self):
         """
-        Return an iterator over database handles, one handle for each Person in
+        Return an iterator over database handles, one handle for each Family in
         the database. 
         """
         return self.flist
 
+    def iter_families(self):
+        """
+        Return an iterator over objects for Families in the database
+        """
+        return imap(self.get_family_from_handle, self.flist)        
+
     def get_note_handles(self):
         """
         Return a list of database handles, one handle for each Note in
@@ -353,11 +372,17 @@ class FilterProxyDb(ProxyDbBase):
 
     def iter_note_handles(self):
         """
-        Return an iterator over database handles, one handle for each Person in
+        Return an iterator over database handles, one handle for each Note in
         the database. 
         """
         return self.nlist
 
+    def iter_notes(self):
+        """
+        Return an iterator over objects for Notes in the database
+        """
+        return imap(self.get_note_from_handle, self.nlist)        
+
     def get_default_person(self):
         """returns the default Person of the database"""
         person = self.db.get_default_person()

src/gen/proxy/living.py

@@ -29,6 +29,7 @@ Proxy class for the GRAMPS databases. Filter out all living people.
 # Python libraries
 #
 #-------------------------------------------------------------------------
+from itertools import ifilter
 
 #-------------------------------------------------------------------------
 #
@@ -110,13 +111,12 @@ class LivingProxyDb(ProxyDbBase):
         """
         Protected version of iter_people
         """
-        for person in self.db.iter_people():
-            if person and self.__is_living(person):
-                if self.mode == self.MODE_EXCLUDE_ALL:
-                    person = None
+        for person in ifilter(None, self.db.iter_people()):
+            if not(self.__is_living(person) and
+                   self.mode == self.MODE_EXCLUDE_ALL):
+
+                yield self.__restrict_person(person)
             else:
-                    person = self.__restrict_person(person)
-            if person:
                 yield person
 
     def get_person_from_gramps_id(self, val):