diff --git a/src/pystencils/sympyextensions/reduction.py b/src/pystencils/sympyextensions/reduction.py
index e2760cc6c85faacedb35eb139afa313feb2b833c..c9e5bfdfb38b576176d10446697232c7fdd08d64 100644
--- a/src/pystencils/sympyextensions/reduction.py
+++ b/src/pystencils/sympyextensions/reduction.py
@@ -12,7 +12,7 @@ class ReducedAssignment(AssignmentBase):
        Symbol for binary operation being applied in the assignment, such as "+",
        "*", etc.
     """
-    binop = None # type: str
+    binop = None  # type: str
 
     @property
     def op(self):
@@ -22,6 +22,7 @@ class ReducedAssignment(AssignmentBase):
 class AddReducedAssignment(ReducedAssignment):
     binop = '+'
 
+
 class SubReducedAssignment(ReducedAssignment):
     binop = '-'
 
@@ -33,6 +34,7 @@ class MulReducedAssignment(ReducedAssignment):
 class MinReducedssignment(ReducedAssignment):
     binop = 'min'
 
+
 class MaxReducedssignment(ReducedAssignment):
     binop = 'max'
 
@@ -45,7 +47,8 @@ reduced_assign_classes = {
     ]
 }
 
+
 def reduced_assign(lhs, op, rhs):
     if op not in reduced_assign_classes:
         raise ValueError("Unrecognized operator %s" % op)
-    return reduced_assign_classes[op](lhs, rhs)
\ No newline at end of file
+    return reduced_assign_classes[op](lhs, rhs)