1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/asynchat.py b/Lib/asynchat.py
index 6e16891..fc6cabe 100644
--- a/Lib/asynchat.py
+++ b/Lib/asynchat.py
@@ -285,6 +285,9 @@ class simple_producer:
 
 class fifo:
     def __init__(self, list=None):
+        import warnings
+        warnings.warn('fifo class will be removed in Python 3.6',
+                      DeprecationWarning, stacklevel=2)
         if not list:
             self.list = deque()
         else: