[py] add a shorthand for walker making

python/dune/xt/grid/__init__.py

@@ -27,3 +27,11 @@ except ImportError as e:
 
 HAVE_DUNE_ALUGRID = 'GridProvider__2d_simplex_aluconform' in globals()
 
+
+def make_walker(gridprovider, level = 0):
+    for factory in [globals()[s] for s in globals().keys() if s.startswith('make_walker_on_')]:
+        try:
+            return factory(gridprovider, level)
+        except:
+            continue
+    raise TypeError('no matching walker for gridview {}'.format(gridprovider.__class__))
\ No newline at end of file

python/test/walker.py

@@ -38,6 +38,14 @@ def test_grid_provider(grid_provider):
     assert grid_provider.max_entity_diameter() > 0
     assert grid_provider.dim > 0
 
+
+def test_walker(grid_provider):
+    walker = xtg.make_walker(grid_provider)
+    walker.walk()
+    walker.clear()
+
+
+
 def test_count():
     pass