diff --git a/masque/library.py b/masque/library.py
index ce5adb2..9771eaf 100644
--- a/masque/library.py
+++ b/masque/library.py
@@ -1038,10 +1038,7 @@ class Library(ILibrary):
         if key in self.mapping:
             raise LibraryError(f'"{key}" already exists in the library. Overwriting is not allowed!')
 
-        if callable(value):
-            value = value()
-        else:
-            value = value
+        value = value() if callable(value) else value
         self.mapping[key] = value
 
     def __delitem__(self, key: str) -> None:
diff --git a/masque/shapes/polygon.py b/masque/shapes/polygon.py
index 33dea9d..1d52489 100644
--- a/masque/shapes/polygon.py
+++ b/masque/shapes/polygon.py
@@ -331,10 +331,7 @@ class Polygon(Shape):
         Returns:
             A Polygon object containing the requested octagon
         """
-        if regular:
-            s = 1 + numpy.sqrt(2)
-        else:
-            s = 2
+        s = (1 + numpy.sqrt(2)) if regular else 2
 
         norm_oct = numpy.array([
             [-1, -s],