fix bugs.

msgpack/__init__.py

@@ -2,30 +2,18 @@
 from msgpack._version import version
 from msgpack.exceptions import *
 
+from collections import namedtuple
 
-class ExtType(object):
-    __slots__ = ('code', 'data')
 
-    def __init__(self, code, data):
+class ExtType(namedtuple('ExtType', 'code data')):
+    def __new__(cls, code, data):
         if not isinstance(code, int):
             raise TypeError("code must be int")
         if not isinstance(data, bytes):
             raise TypeError("data must be bytes")
         if not 0 <= code <= 127:
             raise ValueError("code must be 0~127")
-        self.code = code
-        self.data = data
-
-    def __eq__(self, other):
-        if not isinstance(other, ExtType):
-            return NotImplemented
-        return self.code == other.code and self.data == other.data
-
-    def __hash__(self):
-        return self.code ^ hash(self.data)
-
-    def __repr__(self):
-        return "msgpack.ExtType(%r, %r)" % (self.code, self.data)
+        return super(ExtType, cls).__new__(cls, code, data)
 
 
 import os

msgpack/_packer.pyx

@@ -186,7 +186,7 @@ cdef class Packer(object):
                 # This should be before Tuple because ExtType is namedtuple.
                 longval = o.code
                 rawval = o.data
-                L = len(o[1])
+                L = len(o.data)
                 ret = msgpack_pack_ext(&self.pk, longval, L)
                 ret = msgpack_pack_raw_body(&self.pk, rawval, L)
             elif PyTuple_Check(o) or PyList_Check(o):