diff --git a/port/PyAssimp/pyassimp/core.py b/port/PyAssimp/pyassimp/core.py
index c781f27c9..ca6d8629a 100644
--- a/port/PyAssimp/pyassimp/core.py
+++ b/port/PyAssimp/pyassimp/core.py
@@ -366,16 +366,14 @@ def export_blob(scene,
     ---------
     Pointer to structs.ExportDataBlob
     '''
-    from ctypes import pointer
-    exportBlobPtr = _assimp_lib.export_blob(pointer(scene), file_type.encode("ascii"), processing)
+    exportBlobPtr = _assimp_lib.export_blob(ctypes.pointer(scene), file_type.encode("ascii"), processing)
 
     if exportBlobPtr == 0:
         raise AssimpError('Could not export scene to blob!')
     return exportBlobPtr
 
 def release(scene):
-    from ctypes import pointer
-    _assimp_lib.release(pointer(scene))
+    _assimp_lib.release(ctypes.pointer(scene))
 
 def _finalize_texture(tex, target):
     setattr(target, "achformathint", tex.achFormatHint)
@@ -439,24 +437,22 @@ def _finalize_mesh(mesh, target):
     setattr(target, 'faces', faces)
 
 def _init_metadata_entry(entry):
-    from ctypes import POINTER, c_bool, c_int32, c_uint64, c_float, c_double, cast
-
     entry.type = entry.mType
     if entry.type == structs.MetadataEntry.AI_BOOL:
-        entry.data = cast(entry.mData, POINTER(c_bool)).contents.value
+        entry.data = ctypes.cast(entry.mData, ctypes.POINTER(ctypes.c_bool)).contents.value
     elif entry.type == structs.MetadataEntry.AI_INT32:
-        entry.data = cast(entry.mData, POINTER(c_int32)).contents.value
+        entry.data = ctypes.cast(entry.mData, ctypes.POINTER(ctypes.c_int32)).contents.value
     elif entry.type == structs.MetadataEntry.AI_UINT64:
-        entry.data = cast(entry.mData, POINTER(c_uint64)).contents.value
+        entry.data = ctypes.cast(entry.mData, ctypes.POINTER(ctypes.c_uint64)).contents.value
     elif entry.type == structs.MetadataEntry.AI_FLOAT:
-        entry.data = cast(entry.mData, POINTER(c_float)).contents.value
+        entry.data = ctypes.cast(entry.mData, ctypes.POINTER(ctypes.c_float)).contents.value
     elif entry.type == structs.MetadataEntry.AI_DOUBLE:
-        entry.data = cast(entry.mData, POINTER(c_double)).contents.value
+        entry.data = ctypes.cast(entry.mData, ctypes.POINTER(ctypes.c_double)).contents.value
     elif entry.type == structs.MetadataEntry.AI_AISTRING:
-        assimp_string = cast(entry.mData, POINTER(structs.String)).contents
+        assimp_string = ctypes.cast(entry.mData, ctypes.POINTER(structs.String)).contents
         entry.data = _convert_assimp_string(assimp_string)
     elif entry.type == structs.MetadataEntry.AI_AIVECTOR3D:
-        assimp_vector = cast(entry.mData, POINTER(structs.Vector3D)).contents
+        assimp_vector = ctypes.cast(entry.mData, ctypes.POINTER(structs.Vector3D)).contents
         entry.data = make_tuple(assimp_vector)
 
     return entry
@@ -510,15 +506,18 @@ def _get_properties(properties, length):
         key = (key.split('.')[1], p.mSemantic)
 
         #the data
-        from ctypes import POINTER, cast, c_int, c_float, sizeof
         if p.mType == 1:
-            arr = cast(p.mData, POINTER(c_float * int(p.mDataLength/sizeof(c_float)) )).contents
+            arr = ctypes.cast(p.mData,
+                              ctypes.POINTER(ctypes.c_float * int(p.mDataLength/ctypes.sizeof(ctypes.c_float)))
+                              ).contents
             value = [x for x in arr]
         elif p.mType == 3: #string can't be an array
-            value = _convert_assimp_string(cast(p.mData, POINTER(structs.MaterialPropertyString)).contents)
+            value = _convert_assimp_string(ctypes.cast(p.mData, ctypes.POINTER(structs.MaterialPropertyString)).contents)
 
         elif p.mType == 4:
-            arr = cast(p.mData, POINTER(c_int * int(p.mDataLength/sizeof(c_int)) )).contents
+            arr = ctypes.cast(p.mData,
+                              ctypes.POINTER(ctypes.c_int * int(p.mDataLength/ctypes.sizeof(ctypes.c_int)))
+                              ).contents
             value = [x for x in arr]
         else:
             value = p.mData[:p.mDataLength]
@@ -538,7 +537,9 @@ def decompose_matrix(matrix):
     rotation = structs.Quaternion()
     position = structs.Vector3D()
 
-    from ctypes import byref, pointer
-    _assimp_lib.dll.aiDecomposeMatrix(pointer(matrix), byref(scaling), byref(rotation), byref(position))
+    _assimp_lib.dll.aiDecomposeMatrix(ctypes.pointer(matrix),
+                                      ctypes.byref(scaling),
+                                      ctypes.byref(rotation),
+                                      ctypes.byref(position))
     return scaling._init(), rotation._init(), position._init()
     
diff --git a/scripts/StepImporter/CppGenerator.py b/scripts/StepImporter/CppGenerator.py
index f081d882a..b9dba9902 100644
--- a/scripts/StepImporter/CppGenerator.py
+++ b/scripts/StepImporter/CppGenerator.py
@@ -151,10 +151,7 @@ def handle_unset_args(field,entity,schema,argnum):
     return n+template_allow_optional.format()
 
 def get_single_conversion(field,schema,argnum=0,classname='?'):
-    typen = field.type
     name = field.name
-    if field.collection:
-        typen = 'LIST'
     return template_convert_single.format(name=name,argnum=argnum,classname=classname,full_type=field.fullspec)
 
 def count_args_up(entity,schema):