More cleanup.

[python_utils.git] / string_utils.py

diff --git a/string_utils.py b/string_utils.py
index d75c6ba1aca2c559ed4254d535747c54f4719bf5..4bec031738e989d10507992387e18aa47996da8e 100644 (file)
--- a/string_utils.py
+++ b/string_utils.py
@@ -40,7 +40,17 @@ import string
 import unicodedata
 import warnings
 from itertools import zip_longest
-from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Tuple
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    Iterable,
+    List,
+    Literal,
+    Optional,
+    Sequence,
+    Tuple,
+)
 from uuid import uuid4
 
 import list_utils
@@ -1208,7 +1218,7 @@ def sprintf(*args, **kwargs) -> str:
     return ret
 
 
-class SprintfStdout(object):
+class SprintfStdout(contextlib.AbstractContextManager):
     """
     A context manager that captures outputs to stdout.
 
@@ -1228,10 +1238,10 @@ class SprintfStdout(object):
         self.recorder.__enter__()
         return lambda: self.destination.getvalue()
 
-    def __exit__(self, *args) -> None:
+    def __exit__(self, *args) -> Literal[False]:
         self.recorder.__exit__(*args)
         self.destination.seek(0)
-        return None  # don't suppress exceptions
+        return False
 
 
 def capitalize_first_letter(txt: str) -> str: