1 files changed, 36 insertions, 43 deletions
diff --git a/pendulum/mixins/default.py b/pendulum/mixins/default.py
index bfb5912..59f985e 100644
--- a/pendulum/mixins/default.py
+++ b/pendulum/mixins/default.py
@@ -1,43 +1,36 @@
-from ..formatting import Formatter
-
-
-_formatter = Formatter()
-
-
-class FormattableMixin(object):
-
-    _formatter = _formatter
-
-    def format(self, fmt, locale=None):
-        """
-        Formats the instance using the given format.
-
-        :param fmt: The format to use
-        :type fmt: str
-
-        :param locale: The locale to use
-        :type locale: str or None
-
-        :rtype: str
-        """
-        return self._formatter.format(self, fmt, locale)
-
-    def for_json(self):
-        """
-        Methods for automatic json serialization by simplejson
-
-        :rtype: str
-        """
-        return str(self)
-
-    def __format__(self, format_spec):
-        if len(format_spec) > 0:
-            if "%" in format_spec:
-                return self.strftime(format_spec)
-
-            return self.format(format_spec)
-
-        return str(self)
-
-    def __str__(self):
-        return self.isoformat()
+from __future__ import annotations
+
+from pendulum.formatting import Formatter
+
+_formatter = Formatter()
+
+
+class FormattableMixin:
+    _formatter: Formatter = _formatter
+
+    def format(self, fmt: str, locale: str | None = None) -> str:
+        """
+        Formats the instance using the given format.
+
+        :param fmt: The format to use
+        :param locale: The locale to use
+        """
+        return self._formatter.format(self, fmt, locale)
+
+    def for_json(self) -> str:
+        """
+        Methods for automatic json serialization by simplejson.
+        """
+        return str(self)
+
+    def __format__(self, format_spec: str) -> str:
+        if len(format_spec) > 0:
+            if "%" in format_spec:
+                return self.strftime(format_spec)
+
+            return self.format(format_spec)
+
+        return str(self)
+
+    def __str__(self) -> str:
+        return self.isoformat()