Index: Lib/zlib.py
===================================================================
--- Lib/zlib.py	(revision 3470)
+++ Lib/zlib.py	(working copy)
@@ -1,3 +1,18 @@
+r""""The functions in this module allow compression and decompression using the\n"
+"zlib library, which is based on GNU zip.\n"
+"\n"
+"adler32(string[, start]) -- Compute an Adler-32 checksum.\n"
+"compress(string[, level]) -- Compress string, with compression level in 1-9.\n"
+"compressobj([level]) -- Return a compressor object.\n"
+"crc32(string[, start]) -- Compute a CRC-32 checksum.\n"
+"decompress(string,[wbits],[bufsize]) -- Decompresses a compressed string.\n"
+"decompressobj([wbits]) -- Return a decompressor object.\n"
+"\n"
+"'wbits' is window buffer size.\n"
+"Compressor objects support compress() and flush() methods; decompressor\n"
+"objects support decompress() and flush().");
+"""
+
 import jarray, binascii
 
 from java.util.zip import Adler32, Deflater, Inflater