diff -r 2a953cb5642d Doc/library/gzip.rst
--- a/Doc/library/gzip.rst	Tue Apr 08 12:04:04 2014 -0400
+++ b/Doc/library/gzip.rst	Tue Apr 08 18:48:36 2014 +0200
@@ -175,9 +175,10 @@
 Example of how to GZIP compress an existing file::
 
    import gzip
+   import shutil
    with open('/home/joe/file.txt', 'rb') as f_in:
        with gzip.open('/home/joe/file.txt.gz', 'wb') as f_out:
-           f_out.writelines(f_in)
+           shutil.copyfileobj(f_in, f_out)
 
 Example of how to GZIP compress a binary string::