to satisfy the flake8 linter

lbmpy/advanced_streaming/communication.py

@@ -44,14 +44,15 @@ def _fix_length_one_slices(slices):
         if slices.stop is not None and abs(slices.start - slices.stop) == 1:
             return slices.start
         elif slices.stop is None and slices.start == -1:
-            return -1   #   [-1:] also has length one
+            return -1  # [-1:] also has length one
         else:
             return slices
     else:
         return tuple(_fix_length_one_slices(s) for s in slices)
 
 
-def get_communication_slices(stencil, comm_stencil=None, streaming_pattern='pull', after_timestep='both', ghost_layers=1):
+def get_communication_slices(
+        stencil, comm_stencil=None, streaming_pattern='pull', after_timestep='both', ghost_layers=1):
     """
     Return the source and destination slices for periodicity handling or communication between blocks.
 
@@ -153,4 +154,4 @@ class PeriodicityHandling:
             arr[dst] = arr[src]
 
     def _periodicity_handling_gpu(self, timestep):
-        raise NotImplementedError()
\ No newline at end of file
+        raise NotImplementedError()

lbmpy/advanced_streaming/utility.py

@@ -39,11 +39,13 @@ def get_accessor(streaming_pattern, timestep) -> PdfFieldAccessor:
     else:
         return odd_accessors[streaming_pattern]
 
+
 def is_inplace(streaming_pattern):
     if streaming_pattern not in streaming_patterns:
         raise ValueError('Invalid streaming pattern', streaming_pattern)
 
-    return streaming_pattern in ['aa', 'esotwist'] 
+    return streaming_pattern in ['aa', 'esotwist']
+
 
 def numeric_offsets(field_access: ps.Field.Access):
     return tuple(int(o) for o in field_access.offsets)