don't special case for py3k+numpy

py3k+numpy non-copying recv works fine now, with released pyzmq.  There was no need to make any changes in pyzmq.

closes ipythongh-478

IPython/parallel/tests/test_newserialized.py

@@ -16,13 +16,17 @@
 # Imports
 #-------------------------------------------------------------------------------
 
+import sys
+
 from unittest import TestCase
 
 from IPython.testing.decorators import parametric
 from IPython.utils import newserialized as ns
 from IPython.utils.pickleutil import can, uncan, CannedObject, CannedFunction
 from IPython.parallel.tests.clienttest import skip_without
 
+if sys.version_info[0] >= 3:
+    buffer = memoryview
 
 class CanningTestCase(TestCase):
     def test_canning(self):
@@ -88,10 +92,10 @@ def test_ndarray_serialized(self):
         self.assertEquals(md['shape'], a.shape)
         self.assertEquals(md['dtype'], a.dtype.str)
         buff = ser1.getData()
-        self.assertEquals(buff, numpy.getbuffer(a))
+        self.assertEquals(buff, buffer(a))
         s = ns.Serialized(buff, td, md)
         final = ns.unserialize(s)
-        self.assertEquals(numpy.getbuffer(a), numpy.getbuffer(final))
+        self.assertEquals(buffer(a), buffer(final))
         self.assertTrue((a==final).all())
         self.assertEquals(a.dtype.str, final.dtype.str)
         self.assertEquals(a.shape, final.shape)

IPython/utils/newserialized.py

@@ -35,6 +35,8 @@ class SerializationError(Exception):
     py3k = True
 else:
     py3k = False
+    if sys.version_info[:2] <= (2,6):
+        memoryview = buffer
 
 #-----------------------------------------------------------------------------
 # Classes and functions
@@ -101,10 +103,7 @@ def __init__(self, unSerialized):
         self.data = None
         self.obj = unSerialized.getObject()
         if numpy is not None and isinstance(self.obj, numpy.ndarray):
-            if py3k or len(self.obj.shape) == 0: # length 0 arrays are just pickled
-                # FIXME:
-                # also use pickle for numpy arrays on py3k, since
-                # pyzmq doesn't rebuild from memoryviews properly
+            if len(self.obj.shape) == 0: # length 0 arrays are just pickled
                 self.typeDescriptor = 'pickle'
                 self.metadata = {}
             else:
@@ -125,7 +124,7 @@ def __init__(self, unSerialized):
 
     def _generateData(self):
         if self.typeDescriptor == 'ndarray':
-            self.data = numpy.getbuffer(self.obj)
+            self.data = buffer(self.obj)
         elif self.typeDescriptor in ('bytes', 'buffer'):
             self.data = self.obj
         elif self.typeDescriptor == 'pickle':
@@ -158,11 +157,10 @@ def getObject(self):
         typeDescriptor = self.serialized.getTypeDescriptor()
         if numpy is not None and typeDescriptor == 'ndarray':
                 buf = self.serialized.getData()
-                if isinstance(buf, (bytes, buffer)):
+                if isinstance(buf, (bytes, buffer, memoryview)):
                     result = numpy.frombuffer(buf, dtype = self.serialized.metadata['dtype'])
                 else:
-                    # memoryview
-                    result = numpy.array(buf, dtype = self.serialized.metadata['dtype'])
+                    raise TypeError("Expected bytes or buffer/memoryview, but got %r"%type(buf))
                 result.shape = self.serialized.metadata['shape']
         elif typeDescriptor == 'pickle':
             result = pickle.loads(self.serialized.getData())