use slots for format helper classes

1 files changed, 4 insertions, 0 deletions

diff --git a/src/markupsafe/__init__.py b/src/markupsafe/__init__.py
index c556eaf..0f1c71a 100644
--- a/src/markupsafe/__init__.py
+++ b/src/markupsafe/__init__.py
@@ -211,6 +211,8 @@ class Markup(str):
 
 
 class EscapeFormatter(string.Formatter):
+    __slots__ = ("escape",)
+
     def __init__(self, escape: t.Callable[[t.Any], Markup]) -> None:
         self.escape = escape
         super().__init__()
@@ -250,6 +252,8 @@ def _escape_argspec(
 class _MarkupEscapeHelper:
     """Helper for :meth:`Markup.__mod__`."""
 
+    __slots__ = ("obj", "escape")
+
     def __init__(self, obj: t.Any, escape: t.Callable[[t.Any], Markup]) -> None:
         self.obj = obj
         self.escape = escape