diff --git a/crlcore/src/pyCRL/CMakeLists.txt b/crlcore/src/pyCRL/CMakeLists.txt
index ec6aad3a..36358b17 100644
--- a/crlcore/src/pyCRL/CMakeLists.txt
+++ b/crlcore/src/pyCRL/CMakeLists.txt
@@ -50,6 +50,7 @@
                                     PyGds.cpp
                                     PyLefImport.cpp
                                     PyDefImport.cpp
+                                    PyLefExport.cpp
                       )	    
                    set( pyIncludes  crlcore/PySystem.h
                                     crlcore/PyBanner.h
@@ -72,6 +73,7 @@
                                     crlcore/PyGds.h
                                     crlcore/PyLefImport.h
                                     crlcore/PyDefImport.h
+                                    crlcore/PyLefExport.h
                       )	         
 #      target_link_libraries ( crlcore  ${HURRICANE_PYTHON_NEW_LIBRARIES}
 #                                       ${HURRICANE_PYTHON_LIBRARIES}
diff --git a/crlcore/src/pyCRL/PyCRL.cpp b/crlcore/src/pyCRL/PyCRL.cpp
index 673f7676..a4979fdf 100644
--- a/crlcore/src/pyCRL/PyCRL.cpp
+++ b/crlcore/src/pyCRL/PyCRL.cpp
@@ -36,6 +36,7 @@
 #include "crlcore/PyBlif.h"
 #include "crlcore/PyGds.h"
 #include "crlcore/PyLefImport.h"
+#include "crlcore/PyLefExport.h"
 #include "crlcore/PyDefImport.h"
 #include "crlcore/VhdlEntity.h"
 
@@ -146,6 +147,7 @@ extern "C" {
     PyGds_LinkPyType ();
     PyLefImport_LinkPyType ();
     PyDefImport_LinkPyType ();
+    PyLefExport_LinkPyType ();
 
     PYTYPE_READY ( System );
     PYTYPE_READY ( Banner );
@@ -169,7 +171,8 @@ extern "C" {
     PYTYPE_READY ( Gds );
     PYTYPE_READY ( LefImport );
     PYTYPE_READY ( DefImport );
-   
+    PYTYPE_READY ( LefExport );
+
     // Identifier string can take up to 10 characters.
     __cs.addType ( "alcLib"     , &PyTypeAllianceLibrary  , "<AllianceLibrary>"  , false );
     __cs.addType ( "alcEnv"     , &PyTypeEnvironment      , "<Environment>"      , false );
@@ -229,6 +232,8 @@ extern "C" {
     PyModule_AddObject ( module, "LefImport", (PyObject*)&PyTypeLefImport );
     Py_INCREF ( &PyTypeDefImport );
     PyModule_AddObject ( module, "DefImport", (PyObject*)&PyTypeDefImport );
+    Py_INCREF ( &PyTypeLefExport );
+    PyModule_AddObject ( module, "LefExport", (PyObject*)&PyTypeLefExport );
 
     PyCatalog_postModuleInit ();
     PyEnvironment_postModuleInit ();
diff --git a/crlcore/src/pyCRL/PyLefExport.cpp b/crlcore/src/pyCRL/PyLefExport.cpp
new file mode 100644
index 00000000..9008d030
--- /dev/null
+++ b/crlcore/src/pyCRL/PyLefExport.cpp
@@ -0,0 +1,108 @@
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) UPMC 2017-2018, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |          Alliance / Hurricane  Interface                        |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Module  :  "./PyLefExport.cpp"                             |
+// +-----------------------------------------------------------------+
+
+
+#include "crlcore/PyLefExport.h"
+#include "hurricane/isobar/PyLibrary.h"
+#include <string>
+#include <sstream>
+
+
+namespace  CRL {
+
+  using std::cerr;
+  using std::endl;
+  using std::hex;
+  using std::string;
+  using std::ostringstream;
+  using Hurricane::tab;
+  using Hurricane::Exception;
+  using Hurricane::Bug;
+  using Hurricane::Error;
+  using Hurricane::Warning;
+  using Hurricane::Library;
+  using Isobar::ProxyProperty;
+  using Isobar::ProxyError;
+  using Isobar::ConstructorError;
+  using Isobar::HurricaneError;
+  using Isobar::HurricaneWarning;
+  using Isobar::getPyHash;
+  using Isobar::ParseOneArg;
+  using Isobar::ParseTwoArg;
+  using Isobar::__cs;
+  using Isobar::PyTypeLibrary;
+  using Isobar::PyLibrary;
+
+
+extern "C" {
+
+
+#if defined(__PYTHON_MODULE__)
+
+// +=================================================================+
+// |             "PyLefExport" Python Module Code Part               |
+// +=================================================================+
+
+
+  static PyObject* PyLefExport_drive ( PyObject*, PyObject* args )
+  {
+    cdebug_log(30,0) << "PyLefExport_drive()" << endl;
+
+    PyLibrary* pyLibrary = NULL;
+    
+    HTRY
+      unsigned int flags = 0;
+      
+      if (PyArg_ParseTuple( args, "O!I:LefExport.drive", &PyTypeLibrary, &pyLibrary, &flags)) {
+        LefExport::drive( PYLIBRARY_O(pyLibrary) , flags );
+      } else {
+        PyErr_SetString ( ConstructorError, "LefExport.drive(): Bad type or bad number of parameters." );
+        return NULL;
+      }
+    HCATCH
+
+    Py_RETURN_NONE;
+  }
+
+  // Standart Destroy (Attribute).
+
+
+  PyMethodDef PyLefExport_Methods[] =
+    { { "drive"                , (PyCFunction)PyLefExport_drive     , METH_VARARGS|METH_STATIC
+                              , "Save a complete Cadence LEF library." }
+    , {NULL, NULL, 0, NULL}   /* sentinel */
+    };
+
+
+  NoObjectDeleteMethod(LefExport)
+  PyTypeObjectLinkPyTypeWithoutObject(LefExport,LefExport)
+
+
+#else  // End of Python Module Code Part.
+
+
+// +=================================================================+
+// |              "PyLefExport" Shared Library Code Part             |
+// +=================================================================+
+
+  // Type Definition.
+  PyTypeObjectDefinitionsOfModule(CRL,LefExport)
+
+
+#endif  // End of Shared Library Code Part.
+
+}  // extern "C".
+
+}  // CRL namespace.
diff --git a/crlcore/src/pyCRL/crlcore/PyLefExport.h b/crlcore/src/pyCRL/crlcore/PyLefExport.h
new file mode 100644
index 00000000..edaefcdf
--- /dev/null
+++ b/crlcore/src/pyCRL/crlcore/PyLefExport.h
@@ -0,0 +1,55 @@
+
+// -*- C++ -*-
+//
+// This file is part of the Coriolis Software.
+// Copyright (c) UPMC 2017-2018, All Rights Reserved
+//
+// +-----------------------------------------------------------------+ 
+// |                   C O R I O L I S                               |
+// |          Alliance / Hurricane  Interface                        |
+// |                                                                 |
+// |  Author      :                    Jean-Paul CHAPUT              |
+// |  E-mail      :            Jean-Paul.Chaput@lip6.fr              |
+// | =============================================================== |
+// |  C++ Header  :  "./crlcore/PyLefExport.h"                       |
+// +-----------------------------------------------------------------+
+
+
+#ifndef CRL_PY_LEF_EXPORT_H
+#define CRL_PY_LEF_EXPORT_H
+
+#include "hurricane/isobar/PyHurricane.h"
+#include "crlcore/LefExport.h"
+
+
+namespace  CRL {
+
+extern "C" {
+
+
+// -------------------------------------------------------------------
+// Python Object  :  "PyLefExport".
+
+  typedef struct {
+      PyObject_HEAD
+  } PyLefExport;
+
+
+// -------------------------------------------------------------------
+// Functions & Types exported to "PyCRL.ccp".
+
+  extern  PyTypeObject  PyTypeLefExport;
+  extern  PyMethodDef   PyLefExport_Methods[];
+
+  extern  void          PyLefExport_LinkPyType();
+
+
+#define IsPyLefExport(v)    ( (v)->ob_type == &PyTypeLefExport )
+#define PY_LEFEXPORT(v)     ( (PyLefExport*)(v) )
+
+
+}  // extern "C".
+
+}  // CRL namespace.
+
+#endif  // CRL_PY_LEF_EXPORT_H