--- descr.py   2006-04-10 17:42:53.000000000 -0700
+++ descr-fix.py	2006-10-11 22:27:10.000000000 -0700
@@ -6,7 +6,7 @@
 class FileDescr(object):
     saved = []
 
-    def __init__(self, name=None):
+    def __init__(self, name):
         self.name = name
 
     def __get__(self, obj, typ=None):
@@ -26,14 +26,13 @@
                 "could not read %r: %s" % self.name
 
     def __set__(self, obj, val):
-        f = open(self.name, 'w')
         try:
-            try:
-                pickle.dump(val, f)
-                FileDescr.saved.append(self.name)
-        except (TypeError, pickle.PicklingError), e:
-                raise AttributeError, \
-                    "could not pickle %r" % self.name
+            f = open(self.name, 'w')
+            pickle.dump(val, f)
+            FileDescr.saved.append(self.name)
+        except (IOError, TypeError, pickle.PicklingError), e:
+            raise AttributeError, \
+                "could not pickle %r" % self.name
         finally:
             f.close()