Fix SyntaxWarnings

setup.py

@@ -130,8 +130,8 @@ def example_files(self):
         mlab_ref_dir = join(DEFAULT_INPUT_DIR, 'mayavi', 'auto')
 
         source_path = join('examples', 'mayavi')
-        sources = '(\.py)|(\.rst)$'
-        excluded_dirs = '^\.'
+        sources = r'(\.py)|(\.rst)$'
+        excluded_dirs = r'^\.'
         target_path = mlab_ref_dir
         target_time = self.latest_modified(target_path,
                                            ignore_dirs=excluded_dirs)[0]

tvtk/wrapper_gen.py

@@ -1591,22 +1591,22 @@ def _write_trait_with_range(self, klass, out, vtk_attr_name):
     #         the code for this trait,
     #         i.e. getattr(self, name_of_method)(...)
     special_traits = {
-        '[a-zA-Z0-9]+\.Output$': (
+        r'[a-zA-Z0-9]+\.Output$': (
             False, False, '_write_any_output'),
-        '[a-zA-Z0-9]+\.Source$': (
+        r'[a-zA-Z0-9]+\.Source$': (
             False, False, '_write_any_source'),
-        '[a-zA-Z0-9]+\.ScalarType$': (
+        r'[a-zA-Z0-9]+\.ScalarType$': (
             False, False, '_write_any_scalar_type'),
 
         # In VTK > 4.5, Set/GetInput have multiple signatures
-        '[a-zA-Z0-9]+\.Input$': (
+        r'[a-zA-Z0-9]+\.Input$': (
             False, False, '_write_any_input'),
 
-        '[a-zA-Z0-9]+\.InputConnection$': (
+        r'[a-zA-Z0-9]+\.InputConnection$': (
             False, False, '_write_any_input_connection'),
-        '[a-zA-Z0-9\.]+FileName$': (
+        r'[a-zA-Z0-9\.]+FileName$': (
             True, False, '_write_any_something_file_name'),
-        '[a-zA-Z0-9\.]+FilePrefix$': (
+        r'[a-zA-Z0-9\.]+FilePrefix$': (
             True, False, '_write_any_something_file_prefix'),
         'vtkImageReader2.HeaderSize$': (
             True, False, '_write_image_reader2_header_size'),