Simplify with built-in functions where possible. e.g.

change [x for x in y if x] to filter(None, y)
change [f(x) for x in y] to map(f, x)
change [x for x in y] to list(y)

These changes reduce source code size and complexity and produce some minor performance gains

svn: r14104

src/Simple/_SimpleAccess.py

@@ -683,7 +683,7 @@ class SimpleAccess(object):
 
         if obj:
             handles = [ ref.ref for ref in obj.get_source_references() ]
-            return [ self.dbase.get_source_from_handle(h) for h in handles ]
+            return map(self.dbase.get_source_from_handle, handles)
         else:
             return []
 

src/Simple/_SimpleTable.py

@@ -100,7 +100,7 @@ class SimpleTable(object):
                 columns.append(col)
         # end of unicode fix
         self.__columns = list(copy.copy(columns))
-        self.__sort_vals = [[] for i in range(len(self.__columns))]
+        self.__sort_vals = [[]]*len(self.__columns)
 
     def set_callback(self, which, callback):
         """