Patch #1436130: codecs.lookup() now returns a CodecInfo object (a subclass

of tuple) that provides incremental decoders and encoders (a way to use
stateful codecs without the stream API). Functions
codecs.getincrementaldecoder() and codecs.getincrementalencoder() have
been added.

Lib/encodings/ascii.py

@@ -17,6 +17,14 @@ class Codec(codecs.Codec):
     encode = codecs.ascii_encode
     decode = codecs.ascii_decode
 
+class IncrementalEncoder(codecs.IncrementalEncoder):
+    def encode(self, input, final=False):
+        return codecs.ascii_encode(input, self.errors)[0]
+
+class IncrementalDecoder(codecs.IncrementalDecoder):
+    def decode(self, input, final=False):
+        return codecs.ascii_decode(input, self.errors)[0]
+
 class StreamWriter(Codec,codecs.StreamWriter):
     pass
 
@@ -31,5 +39,12 @@ class StreamConverter(StreamWriter,StreamReader):
 ### encodings module API
 
 def getregentry():
-
-    return (Codec.encode,Codec.decode,StreamReader,StreamWriter)
+    return codecs.CodecInfo(
+        name='ascii',
+        encode=Codec.encode,
+        decode=Codec.decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamwriter=StreamWriter,
+        streamreader=StreamReader,
+    )