Ack, removed useless import of os I just introduced.
diff --git a/Lib/gzip.py b/Lib/gzip.py
index 9cab995..5f638c4 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -5,7 +5,7 @@
 
 # based on Andrew Kuchling's minigzip.py distributed with the zlib module
 
-import os, struct, sys, time
+import struct, sys, time
 import zlib
 import __builtin__