Fix for bug #222395: UTF-16 et al. don't handle .readline().

They now raise an NotImplementedError to hint to the truth ;-)

Lib/encodings/utf_16.py

@@ -53,6 +53,9 @@ class StreamReader(Codec,codecs.StreamReader):
             self.bom_read = 1
         return codecs.StreamReader.read(self, size)
 
+    def readline(self, size=None):
+        raise NotImplementedError, '.readline() is not implemented for UTF-16'
+
 ### encodings module API
 
 def getregentry():

Lib/encodings/utf_16_be.py

@@ -21,7 +21,9 @@ class StreamWriter(Codec,codecs.StreamWriter):
     pass
         
 class StreamReader(Codec,codecs.StreamReader):
-    pass
+
+    def readline(self, size=None):
+        raise NotImplementedError, '.readline() is not implemented for UTF-16-BE'
 
 ### encodings module API
 

Lib/encodings/utf_16_le.py

@@ -21,7 +21,9 @@ class StreamWriter(Codec,codecs.StreamWriter):
     pass
         
 class StreamReader(Codec,codecs.StreamReader):
-    pass
+
+    def readline(self, size=None):
+        raise NotImplementedError, '.readline() is not implemented for UTF-16-LE'
 
 ### encodings module API