bpo-33138: Change standard error message for non-pickleable and non-copyable types. (GH-6239)

1 files changed, 2 insertions, 3 deletions

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index b8975ff533..e4a879941e 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -814,8 +814,7 @@ class _BufferedIOMixin(BufferedIOBase):
         return self.raw.mode
 
     def __getstate__(self):
-        raise TypeError("can not serialize a '{0}' object"
-                        .format(self.__class__.__name__))
+        raise TypeError(f"cannot pickle {self.__class__.__name__!r} object")
 
     def __repr__(self):
         modname = self.__class__.__module__
@@ -1554,7 +1553,7 @@ class FileIO(RawIOBase):
             self.close()
 
     def __getstate__(self):
-        raise TypeError("cannot serialize '%s' object", self.__class__.__name__)
+        raise TypeError(f"cannot pickle {self.__class__.__name__!r} object")
 
     def __repr__(self):
         class_name = '%s.%s' % (self.__class__.__module__,