fix pickling of CLibraryLoaderType

dill/_dill.py

@@ -100,6 +100,7 @@ def ndarraysubclassinstance(obj):
             elif cls is TypeType: return False
             elif 'numpy.ndarray' not in str(getattr(cls, 'mro', int.mro)()):
                 return False
+        except OSError: return False # ctypes.LibraryLoader
         except ReferenceError: return False # handle 'R3' weakref in 3.x
         except TypeError: return False
         # anything below here is a numpy array (or subclass) instance
@@ -118,6 +119,7 @@ def numpyufunc(obj):
             elif cls is TypeType: return False
             if 'numpy.ufunc' not in str(getattr(cls, 'mro', int.mro)()):
                 return False
+        except OSError: return False # ctypes.LibraryLoader
         except ReferenceError: return False # handle 'R3' weakref in 3.x
         except TypeError: return False
         # anything below here is a numpy ufunc
@@ -131,6 +133,7 @@ def numpydtype(obj):
             elif cls is TypeType: return False
             if 'numpy.dtype' not in str(getattr(obj, 'mro', int.mro)()):
                 return False
+        except OSError: return False # ctypes.LibraryLoader
         except ReferenceError: return False # handle 'R3' weakref in 3.x
         except TypeError: return False
         # anything below here is a numpy dtype

dill/_objects.py

@@ -188,10 +188,8 @@ class _Struct(ctypes.Structure):
     z['CFloatType'] = ctypes.c_float()
     z['CDoubleType'] = ctypes.c_double()
     z['CSizeTType'] = ctypes.c_size_t()
-    z = (sys.platform[:3] == 'win' or sys.platform[:6] == 'darwin') # non-'nux
-    z = a if (sys.hexversion >= 0x30b00b3 and not z) else x
-    z['CLibraryLoaderType'] = ctypes.cdll
     del z
+    a['CLibraryLoaderType'] = ctypes.cdll
     a['StructureType'] = _Struct
     # if not IS_PYPY:
     #     a['BigEndianStructureType'] = ctypes.BigEndianStructure()