Issue #1771: Remove cmp parameter from list.sort() and builtin.sorted().
diff --git a/Lib/cookielib.py b/Lib/cookielib.py
index 4552412..ee31f46 100644
--- a/Lib/cookielib.py
+++ b/Lib/cookielib.py
@@ -1255,8 +1255,7 @@
 
         """
         # add cookies in order of most specific (ie. longest) path first
-        def decreasing_size(a, b): return cmp(len(b.path), len(a.path))
-        cookies.sort(decreasing_size)
+        cookies.sort(key=lambda a: len(a.path), reverse=True)
 
         version_set = False