diff --git a/port/PyAssimp/scripts/quicktest.py b/port/PyAssimp/scripts/quicktest.py
index 1133c4689..cbeccb4ab 100755
--- a/port/PyAssimp/scripts/quicktest.py
+++ b/port/PyAssimp/scripts/quicktest.py
@@ -18,35 +18,36 @@ sys.path.insert(0, '..')
 import sample
 from pyassimp import errors
 
-# paths to be walkd recursively
-basepaths = [os.path.join('..','..','..','test','models'), os.path.join('..','..','..','test','models-nonbsd')]
+# Paths to model files.
+basepaths = [os.path.join('..', '..', '..', 'test', 'models'),
+             os.path.join('..', '..', '..', 'test', 'models-nonbsd')]
+
+# Valid extensions for 3D model files.
+extensions = ['.3ds', '.x', '.lwo', '.obj', '.md5mesh', '.dxf', '.ply', '.stl',
+              '.dae', '.md5anim', '.lws', '.irrmesh', '.nff', '.off', '.blend']
 
-# file extensions to be considered
-extensions = ['.3ds','.x','.lwo','.obj','.md5mesh','.dxf','.ply','.stl','.dae','.md5anim','.lws','.irrmesh','.nff','.off','.blend']
 
 def run_tests():
-    ok,err = 0,0
+    ok, err = 0, 0
     for path in basepaths:
         print("Looking for models in %s..." % path)
         for root, dirs, files in os.walk(path):
             for afile in files:
-                base,ext = os.path.splitext(afile)
+                base, ext = os.path.splitext(afile)
                 if ext in extensions:
                     try:
-                        sample.main(os.path.join(root,afile))
+                        sample.main(os.path.join(root, afile))
                         ok += 1
                     except errors.AssimpError as error:
-                        # assimp error is fine, this is a controlled case
+                        # Assimp error is fine; this is a controlled case.
                         print(error)
                         err += 1
                     except Exception:
-                        print("Error encountered while loading <%s>"%os.path.join(root,afile))
-    print('** Loaded %s models, got controlled errors for %s files' % (ok,err))
+                        print("Error encountered while loading <%s>"
+                              % os.path.join(root, afile))
+    print('** Loaded %s models, got controlled errors for %s files'
+          % (ok, err))
 
 
 if __name__ == '__main__':
-	run_tests()
-
-
-
-
+    run_tests()