Small changes

pystencils/stencil.py

@@ -319,18 +319,14 @@ def adjacent_directions(direction):
         return tuple(result)
     binary_numbers_list = binary_numbers(len(direction))
     for adjacent_direction in binary_numbers_list:
-        for i in range(len(direction)):
-            if direction[i] == 0:
+        for i, entry in enumerate(direction):
+            if entry == 0:
                 adjacent_direction[i] = 0
-            if direction[i] == -1 and adjacent_direction[i] == 1:
+            if entry == -1 and adjacent_direction[i] == 1:
                 adjacent_direction[i] = -1
         if not all(e == 0 for e in adjacent_direction):
             result.add(tuple(adjacent_direction))
-    result = list(result)
-    result.sort()
-    return tuple(result)
-
-
+    return tuple(sorted(result))
 # -------------------------------------- Visualization -----------------------------------------------------------------