diff --git a/sphinx/environment.py b/sphinx/environment.py
index fad5f2b36..d9be0be5f 100644
--- a/sphinx/environment.py
+++ b/sphinx/environment.py
@@ -1706,11 +1706,7 @@ class BuildEnvironment:
         fignum_counter = {}
 
         def has_child(node, cls):
-            for child in node:
-                if isinstance(child, cls):
-                    return True
-
-            return False
+            return any(isinstance(child, cls) for child in node)
 
         def get_section_number(docname, section):
             anchorname = '#' + section['ids'][0]
diff --git a/sphinx/transforms.py b/sphinx/transforms.py
index 7624ad170..72917f53f 100644
--- a/sphinx/transforms.py
+++ b/sphinx/transforms.py
@@ -109,11 +109,7 @@ class AutoNumbering(Transform):
 
     def apply(self):
         def has_child(node, cls):
-            for child in node:
-                if isinstance(child, cls):
-                    return True
-
-            return False
+            return any(isinstance(child, cls) for child in node)
 
         for node in self.document.traverse(nodes.Element):
             if isinstance(node, nodes.figure):