+class SprintfStdout(object):
+ def __init__(self) -> None:
+ self.destination = io.StringIO()
+ self.recorder = None
+
+ def __enter__(self) -> Callable[[], str]:
+ self.recorder = contextlib.redirect_stdout(self.destination)
+ self.recorder.__enter__()
+ return lambda: self.destination.getvalue()
+
+ def __exit__(self, *args) -> None:
+ self.recorder.__exit__(*args)
+ self.destination.seek(0)
+ return None # don't suppress exceptions
+
+