subtensor works

_test_tensor.py

@@ -129,6 +129,7 @@ class T_subtensor(unittest.TestCase):
         self.failUnless(t.owner.__class__ is Subtensor)
         try:
             tval = eval_outputs([t])
+            self.fail()
         except Exception, e:
             if e[0] != 'index out of bounds':
                 raise
@@ -146,7 +147,6 @@ class T_subtensor(unittest.TestCase):
         tval = eval_outputs([t])
         self.failUnless(tval.shape == (2,))
         self.failUnless(tval[1] == 5.0)
-    if 0:
     def test1_err_invalid(self):
         n = tinit(numpy.ones(1))
         try:
@@ -159,8 +159,8 @@ class T_subtensor(unittest.TestCase):
         t = n[0]
         self.failUnless(t.owner.__class__ is Subtensor)
         tval = eval_outputs([t])
-            self.failUnless(tval.shape == (1,))
-            self.failUnless(tval[0] == 5.0)
+        self.failUnless(tval.shape == ())
+        self.failUnless(tval == 5.0)
     def test1_ok_range_infinite(self):
         n = tinit(numpy.ones(3)*5)
         t = n[1:]
@@ -173,35 +173,87 @@ class T_subtensor(unittest.TestCase):
         t = n[1::2]
         self.failUnless(t.owner.__class__ is Subtensor)
         tval = eval_outputs([t])
-            self.failUnless(tval.shape == (3,))
+        self.failUnless(tval.shape == (2,))
         self.failUnless(tval[1] == 5.0)
 
-            tval = eval_outputs([n[1:-1:2]])
-            self.failUnless(tval.shape == (3,))
+        tval = eval_outputs([n[0:-1:2]]) #0 to 1 from the end stepping by 2
+        self.failUnless(tval.shape == (2,))
         self.failUnless(tval[1] == 5.0)
 
-    def test2(self):
-        raise NotImplementedError() #remember to bring back the rest of tests
-    if 0:
     def test2_err_bounds0(self):
-            raise NotImplementedError()
+        n = tinit(numpy.ones((2,3))*5)
+        t = n[0,4]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        try:
+            tval = eval_outputs([t])
+            self.fail()
+        except IndexError, e:
+            return
     def test2_err_bounds1(self):
-            raise NotImplementedError()
+        n = tinit(numpy.ones((2,3))*5)
+        t = n[4:5,2]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        try:
+            tval = eval_outputs([t])
+        except Exception, e:
+            if e[0] != 'index out of bounds':
+                raise
     def test2_ok_elem(self):
-            raise NotImplementedError()
+        n = tinit(numpy.asarray(range(6)).reshape((2,3)))
+        t = n[0,2]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == ())
+        self.failUnless(numpy.all(tval == 2))
     def test2_ok_row(self):
-            raise NotImplementedError()
+        n = tinit(numpy.asarray(range(6)).reshape((2,3)))
+        t = n[1]
+        self.failIf(any(n.broadcastable))
+        self.failUnless(t.owner.__class__ is Subtensor)
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == (3,))
+        self.failUnless(numpy.all(tval == [3,4,5]))
+
     def test2_ok_col(self):
-            raise NotImplementedError()
+        n = tinit(numpy.ones((2,3))*5)
+        t = n[:,0]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        self.failIf(any(n.broadcastable))
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == (2,))
+        self.failUnless(numpy.all(tval == 5.0))
+
     def test2_ok_rows_finite(self):
-            raise NotImplementedError()
+        n = tinit(numpy.ones((4,3))*5)
+        t = n[1:3,0]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == (2,))
+        self.failUnless(numpy.all(tval == 5.0))
+
     def test2_ok_cols_infinite(self):
-            raise NotImplementedError()
+        n = tinit(numpy.asarray(range(12)).reshape((4,3)))
+        t = n[1,2:]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == (1,))
+        self.failUnless(numpy.all(tval == 5))
+
     def test2_ok_strided(self):
-            raise NotImplementedError()
+        n = tinit(numpy.asarray(range(20)).reshape((4,5)))
+        t = n[1:4:2,1:5:2]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == (2,2))
+        self.failUnless(numpy.all(tval == [[6, 8],[16, 18]]))
 
     def test3_ok_mat(self):
-            raise NotImplementedError()
+        n = tinit(numpy.asarray(range(24)).reshape((2,3,4)))
+        t = n[0,0,0]
+        self.failUnless(t.owner.__class__ is Subtensor)
+        tval = eval_outputs([t])
+        self.failUnless(tval.shape == ())
+        self.failUnless(numpy.all(tval == 0))
 
 
 class T_add(unittest.TestCase):

tensor.py

 """A ResultBase to store numpy.ndarray with basic accompanying Ops"""
+import sys # for sys.maxint
+import inspect
 
 import numpy
-from copy import copy
-import inspect
+
 from gof import ResultBase, Op, utils, Destroyer, Viewer, AbstractFunctionError
 import gof.result
 
@@ -374,6 +375,7 @@ class Subtensor(Op, Viewer):
     nin = 2
     nout = 1
     e_invalid = 'invalid index'
+    debug = 0
     def __init__(self, *args,**kwargs):
         def as_tuple_result(obj):
             if isinstance(obj, ResultBase):
@@ -384,7 +386,13 @@ class Subtensor(Op, Viewer):
             else:
                 r.data = (obj,)
             return r
+        def pad(tplR, N):
+            l = list(tplR.data)
+            for i in range(len(l), N):
+                l.append(slice(0,sys.maxint,1))
+            tplR.data = tuple(l)
 
+        if Subtensor.debug:
             print 'Subtensor.__init__', args, kwargs
         #Olivier says not to call this
         #Op.__init__(self,  *args,**kwargs) 
@@ -392,9 +400,16 @@ class Subtensor(Op, Viewer):
         t, coord = args
         t = _as_tensor(t)
         coord = as_tuple_result(coord)
-        if len(coord.data) != len(t.broadcastable):
+        if len(coord.data) > len(t.broadcastable):
             raise ValueError(Subtensor.e_invalid)
+        # add the implicit extra unbounded slices 
+        # e.g. n[0] on a 3d tensor pads to n[0,:,:]
+        pad(coord, len(t.broadcastable))
         broadcastable = [0 for c in coord.data if isinstance(c, slice)]
+        if Subtensor.debug:
+            print 'brdcstble', broadcastable
+            print 't', t.data
+            print 'coord', coord.data
         self.inputs = [t, coord]
         self.outputs = [Tensor(t.dtype, broadcastable)]
     def view_map(self): 
@@ -402,6 +417,9 @@ class Subtensor(Op, Viewer):
     def perform(self):
         x = self.inputs[0].data
         c = self.inputs[1].data
+        if Subtensor.debug:
+            print 'perform: x', x
+            print 'perform: c', c
         if len(c) == 1:
             self.outputs[0].data = x.__getitem__(c[0])
         else: