These C extensions living in a package were doing relative imports of

other modules living in the same package.  It turns out that that
doesn't work when the __import__ builtin has been replaced by one
written in Python.  The easiest fix is to use absolute imports.

src/Persistence/cPersistence.c

@@ -14,7 +14,7 @@
 static char cPersistence_doc_string[] = 
 "Defines Persistent mixin class for persistent objects.\n"
 "\n"
-"$Id: cPersistence.c,v 1.62 2002/06/18 21:37:56 jeremy Exp $\n";
+"$Id: cPersistence.c,v 1.63 2002/09/30 16:02:32 gvanrossum Exp $\n";
 
 #include "cPersistence.h"
 
@@ -845,7 +845,7 @@ initcPersistence(void)
 {
   PyObject *m, *d, *s;
 
-  s = PyString_FromString("TimeStamp");
+  s = PyString_FromString("ZODB.TimeStamp");
   if (s == NULL)
       return;
   m = PyImport_Import(s);

src/ZODB/cPersistence.c

@@ -14,7 +14,7 @@
 static char cPersistence_doc_string[] = 
 "Defines Persistent mixin class for persistent objects.\n"
 "\n"
-"$Id: cPersistence.c,v 1.62 2002/06/18 21:37:56 jeremy Exp $\n";
+"$Id: cPersistence.c,v 1.63 2002/09/30 16:02:32 gvanrossum Exp $\n";
 
 #include "cPersistence.h"
 
@@ -845,7 +845,7 @@ initcPersistence(void)
 {
   PyObject *m, *d, *s;
 
-  s = PyString_FromString("TimeStamp");
+  s = PyString_FromString("ZODB.TimeStamp");
   if (s == NULL)
       return;
   m = PyImport_Import(s);

src/ZODB/coptimizations.c

@@ -14,7 +14,7 @@
 static char coptimizations_doc_string[] = 
 "C optimization for new_persistent_id().\n"
 "\n"
-"$Id: coptimizations.c,v 1.19 2002/09/17 03:42:58 jeremy Exp $\n";
+"$Id: coptimizations.c,v 1.20 2002/09/30 16:02:32 gvanrossum Exp $\n";
 
 #include "Python.h"
 #define DONT_USE_CPERSISTENCECAPI
@@ -288,7 +288,7 @@ initcoptimizations(void)
     make_string(new_oid);
 			
     /* Get InvalidObjectReference error */
-    UNLESS (m=PyString_FromString("POSException")) return;
+    UNLESS (m=PyString_FromString("ZODB.POSException")) return;
     ASSIGN(m, PyImport_Import(m));
     UNLESS (m) return;
     ASSIGN(m, PyObject_GetAttrString(m, "InvalidObjectReference"));

src/persistent/cPersistence.c

@@ -14,7 +14,7 @@
 static char cPersistence_doc_string[] = 
 "Defines Persistent mixin class for persistent objects.\n"
 "\n"
-"$Id: cPersistence.c,v 1.62 2002/06/18 21:37:56 jeremy Exp $\n";
+"$Id: cPersistence.c,v 1.63 2002/09/30 16:02:32 gvanrossum Exp $\n";
 
 #include "cPersistence.h"
 
@@ -845,7 +845,7 @@ initcPersistence(void)
 {
   PyObject *m, *d, *s;
 
-  s = PyString_FromString("TimeStamp");
+  s = PyString_FromString("ZODB.TimeStamp");
   if (s == NULL)
       return;
   m = PyImport_Import(s);