Real pickling for bytes.

Restore complex pickling.
Use cPickle in io.py.

1 files changed, 5 insertions, 1 deletions

diff --git a/Lib/io.py b/Lib/io.py
index b2860f4d46..fd39826ae0 100644
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -30,10 +30,14 @@ __all__ = ["BlockingIOError", "open", "IOBase", "RawIOBase", "FileIO",
 import os
 import sys
 import codecs
-import pickle
 import _fileio
 import warnings
 
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
+
 # XXX Shouldn't we use st_blksize whenever we can?
 DEFAULT_BUFFER_SIZE = 8 * 1024  # bytes