add SEEK_ constants to _pyio

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 334c2b7e05f9f4cc0d33b5bb9791ae5505f869b1..66cdc20a0eaed9f4309a3c6ccfb04e070488b9c6 100644 (file)
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -14,6 +14,7 @@ except ImportError:
 
 import io
 from io import __all__
+from io import SEEK_SET, SEEK_CUR, SEEK_END
 
 # open() uses st_blksize whenever we can
 DEFAULT_BUFFER_SIZE = 8 * 1024  # bytes