Index: gzip.py
===================================================================
--- gzip.py	(revision 65380)
+++ gzip.py	(working copy)
@@ -8,6 +8,7 @@
 import struct, sys, time
 import zlib
 import builtins
+import io
 
 __all__ = ["GzipFile","open"]
 
@@ -459,7 +460,26 @@
         else:
             raise StopIteration
 
+def compress(data, compresslevel=9) -> "compressed data":
+    """ Compress data in one shot. Returns the compressed string.
+    Optional argument is the compression level, in 1-9. """
+    
+    if type(data) is str:
+        raise TypeError("argument 1 must be bytes or read-only buffer, not str")
+    
+    bf = io.BytesIO(b'')
+    f = GzipFile(fileobj=bf, mode='wb', compresslevel=compresslevel)
+    f.write(data)
+    f.close()
 
+    return bf.getvalue()
+
+def decompress(data) -> "decompressed data":
+    """ Decompress data in one shot. Returns the decompressed data. """
+    
+    f = GzipFile(fileobj = io.BytesIO(data))
+    return f.read()
+
 def _test():
     # Act like gzip; with -d, act like gunzip.
     # The input file is not deleted, however, nor are any other gzip