Patch #462635 by Andrew Kuchling correcting bugs in the new
codecs -- the self argument does matter for Python functions (it
does not for C functions which most other codecs use).
diff --git a/Lib/encodings/quopri_codec.py b/Lib/encodings/quopri_codec.py
index 42074f4..d98b5ed 100644
--- a/Lib/encodings/quopri_codec.py
+++ b/Lib/encodings/quopri_codec.py
@@ -41,8 +41,10 @@
 
 class Codec(codecs.Codec):
 
-    encode = quopri_encode
-    decode = quopri_decode
+    def encode(self, input,errors='strict'):
+        return quopri_encode(input,errors)
+    def decode(self, input,errors='strict'):
+        return quopri_decode(input,errors)
 
 class StreamWriter(Codec, codecs.StreamWriter):
     pass