Made correction and remove dupplicate of eliminate_zeros

theano/sparse/sandbox/sp2.py

+import theano
 import numpy
 import scipy.sparse
 
 from theano import gof, tensor, scalar
 from theano.tensor import blas
-from theano import tensor as T
 
 from theano.sparse.basic import (
     as_sparse_variable, SparseType, add_s_s, neg,
@@ -11,10 +11,14 @@ from theano.sparse.basic import (
     CSMProperties, CSM, register_specialize,
     _is_sparse_variable, _is_dense_variable, CSC, CSR,
     csm_properties, csm_data, csm_indices, csm_indptr, csm_shape,
-    _is_sparse)
+    _is_sparse, Remove0, remove0)
 from theano.sparse.sandbox.sp import sp_sum
 
 
+EliminateZeros = Remove0
+eliminate_zeros = remove0
+
+
 class Cast(gof.op.Op):
     """Cast sparse variable to the desired dtype.
 
@@ -42,7 +46,7 @@ class Cast(gof.op.Op):
         out[0] = x.astype(self.out_type)
 
     def grad(self, inputs, outputs_gradients):
-        if inputs[0].dtype in T.continuous_dtypes:
+        if inputs[0].dtype in tensor.continuous_dtypes:
             gz = outputs_gradients[0]
             return [Cast(inputs[0].dtype)(gz)]
         else:
@@ -52,7 +56,7 @@ class Cast(gof.op.Op):
         return ins_shapes
 
     def __str__(self):
-        return self.__class__.__name__
+        return "%s(%s)" % (self.__class__.__name__, self.out_type)
 
 
 def cast(x, t):
@@ -341,6 +345,10 @@ mul_s_d_csr = MulSDCSR()
 
 
 class Poisson(gof.op.Op):
+    """Return a sparse having random values from a poisson density
+    with mean from the input.
+
+    """
     def __eq__(self, other):
         return (type(self) == type(other))
 
@@ -357,10 +365,28 @@ class Poisson(gof.op.Op):
         out[0].data = numpy.asarray(numpy.random.poisson(out[0].data),
                                     dtype=x.dtype)
         out[0].eliminate_zeros()
+
+    def grad(self, inputs, outputs_gradients):
+        return [None]
+
+    def infer_shape(self, node, ins_shapes):
+        return ins_shapes
+
+    def __str__(self):
+        return self.__class__.__name__
 poisson = Poisson()
 
 
 class Multinomial(gof.op.Op):
+    """Return a sparse matrix having random values from a multinomial
+    density having number of experiment `n` and probability of succes
+    `p`.
+
+    :Parameters:
+    - `n`: Number of experiment.
+    - `p`: Sparse probability of each of the different outcomes.
+
+    """
     def __eq__(self, other):
         return (type(self) == type(other))
 
@@ -383,38 +409,16 @@ class Multinomial(gof.op.Op):
         for i in xrange(p.shape[0]):
             k, l = p.indptr[i], p.indptr[i + 1]
             out[0].data[k:l] = numpy.random.multinomial(n[i], p.data[k:l])
-multinomial = Multinomial()
-
-
-class EliminateZeros(gof.op.Op):
-    """Eliminate zeros from the data of the matrix.
-
-    This wrap the method eliminate_zeros from scipy.
-    """
-    def __eq__(self, other):
-        return (type(self) == type(other))
-
-    def __hash__(self):
-        return hash(type(self))
-
-    def make_node(self, x):
-        x = as_sparse_variable(x)
-        return gof.Apply(self, [x], [x.type()])
-
-    def perform(self, node, (x, ), (out, )):
-        assert _is_sparse(x)
-        out[0] = x.copy()
-        out[0].eliminate_zeros()
 
     def grad(self, inputs, outputs_gradients):
-        return outputs_gradients
+        return [None, None]
 
     def infer_shape(self, node, ins_shapes):
         return ins_shapes
 
     def __str__(self):
         return self.__class__.__name__
-eliminate_zeros = EliminateZeros()
+multinomial = Multinomial()
 
 
 class Binomial(gof.op.Op):
@@ -450,6 +454,12 @@ class Binomial(gof.op.Op):
 
     def grad(self, (n, p, shape, ), (gz,)):
         return None, None, None
+
+    def infer_shape(self, node, ins_shapes):
+        return ins_shapes
+
+    def __str__(self):
+        return self.__class__.__name__
 csr_fbinomial = Binomial('csr', 'float32')
 csc_fbinomial = Binomial('csc', 'float32')
 csr_dbinomial = Binomial('csr', 'float64')

theano/sparse/tests/test_basic.py

@@ -1320,15 +1320,21 @@ def test_size():
         check()
 
 
-def test_remove0():
+class Remove0Tester(utt.InferShapeTester):
+    def setUp(self):
+        super(Remove0Tester, self).setUp()
+        self.op_class = Remove0
+
+    def test_remove0(self):
         configs = [
             # structure type, numpy matching class
             ('csc', scipy.sparse.csc_matrix),
-        ('csr', scipy.sparse.csr_matrix),
-        ]
+            ('csr', scipy.sparse.csr_matrix), ]
+
         for format, matrix_class in configs:
             # real
-        origin = (numpy.arange(9) + 1).reshape((3, 3)).astype(config.floatX)
+            origin = (numpy.arange(9) + 1).reshape((3, 3))
+            origin.astype(config.floatX)
             mat = matrix_class(origin).astype(theano.config.floatX)
 
             mat[0, 1] = mat[1, 0] = mat[2, 2] = 0
@@ -1347,9 +1353,10 @@ def test_remove0():
             if theano.config.mode not in ['FAST_COMPILE']:
                 # list of apply nodes in the optimized graph.
                 nodes = f.maker.env.toposort()
-            v = [True for node in nodes
-                 if isinstance(node.op, Remove0) and node.op.inplace]
-            assert len(v), 'Inplacing optimization should have been applied.'
+                v = [True for node in nodes]
+                if isinstance(node.op, Remove0) and node.op.inplace:
+                    assert len(v), \
+                    'Inplacing optimization should have been applied.'
 
             # checking
             # makes sense to change its name
@@ -1359,6 +1366,34 @@ def test_remove0():
             msg = 'Matrices sizes differ. Have zeros been removed ?'
             assert result.size == target.size, msg
 
+    def test_infer_shape(self):
+        mat = (numpy.arange(9) + 1).reshape((3, 3))
+        mat[0, 1] = mat[1, 0] = mat[2, 2] = 0
+
+        x_csc = theano.sparse.csc_matrix(dtype=theano.config.floatX)
+        mat_csc = sp.csc_matrix(mat, dtype=theano.config.floatX)
+        self._compile_and_check([x_csc],
+                                [Remove0()(x_csc)],
+                                [mat_csc],
+                                self.op_class)
+
+        x_csr = theano.sparse.csr_matrix(dtype=theano.config.floatX)
+        mat_csr = sp.csr_matrix(mat, dtype=theano.config.floatX)
+        self._compile_and_check([x_csr],
+                                [Remove0()(x_csr)],
+                                [mat_csr],
+                                self.op_class)
+
+    def test_grad(self):
+        mat = (numpy.arange(9) + 1).reshape((3, 3))
+        mat[0, 1] = mat[1, 0] = mat[2, 2] = 0
+
+        mat_csc = sp.csc_matrix(mat, dtype=theano.config.floatX)
+        verify_grad_sparse(Remove0(), [mat_csc])
+
+        mat_csr = sp.csr_matrix(mat, dtype=theano.config.floatX)
+        verify_grad_sparse(Remove0(), [mat_csr])
+
 
 class Test_getitem(unittest.TestCase):
     def setUp(self):

theano/sparse/tests/test_sp2.py

@@ -10,10 +10,10 @@ except ImportError:
     pass  # The variable enable_sparse will be used to disable the test file.
 
 import theano
+from theano import tensor
+from theano import sparse
 
-from theano import tensor as T
-from theano import sparse as S
-if not S.enable_sparse:
+if not theano.sparse.enable_sparse:
     raise SkipTest('Optional package sparse disabled')
 
 from theano.sparse.sandbox import sp2 as S2
@@ -52,9 +52,10 @@ def random_lil(shape, dtype, nnz):
 
 
 class TestCast(utt.InferShapeTester):
-    compatible_types = T.int_dtypes + T.continuous_dtypes
-    x_csc = [S.csc_matrix(dtype=t) for t in compatible_types]
-    x_csr = [S.csr_matrix(dtype=t) for t in compatible_types]
+    compatible_types = (tensor.int_dtypes +
+                        tensor.continuous_dtypes)
+    x_csc = [theano.sparse.csc_matrix(dtype=t) for t in compatible_types]
+    x_csr = [theano.sparse.csr_matrix(dtype=t) for t in compatible_types]
 
     indptr = np.array([0, 2, 3, 6])
     indices = np.array([0, 2, 2, 0, 1, 2])
@@ -78,7 +79,7 @@ class TestCast(utt.InferShapeTester):
 
         for x in self.x_csc:
             for f, t in zip(cast_csc[x], self.compatible_types):
-                a = sp.csc_matrix(self.properties, dtype=x.dtype)
+                a = sp.csc_matrix(self.properties, dtype=x.dtype).copy()
                 assert f(a).dtype == t
 
         for x in self.x_csr:
@@ -104,63 +105,19 @@ class TestCast(utt.InferShapeTester):
                                         self.op_class)
 
     def test_grad(self):
-        for dtype in T.float_dtypes:
+        # TODO Find the problem with the grad of downcast
+        # a = sp.csc_matrix(self.properties, dtype='float64')
+        # verify_grad_sparse(S2.Cast('float32'), [a], cast_to_output_type=True)
+
+        for dtype in tensor.float_dtypes:
             a = sp.csc_matrix(self.properties, dtype=dtype)
             verify_grad_sparse(S2.Cast('float64'), [a])
 
-        for dtype in T.float_dtypes:
+        for dtype in tensor.float_dtypes:
             a = sp.csr_matrix(self.properties, dtype=dtype)
             verify_grad_sparse(S2.Cast('float64'), [a])
 
 
-class EliminateZerosTester(utt.InferShapeTester):
-    indptr = np.array([0, 2, 3, 6])
-    indices = np.array([0, 2, 2, 0, 1, 2])
-    data = np.array([1, 0, 3, 0, 5, 6], dtype='float32')
-    properties = (data, indices, indptr)
-
-    x_csc = S.csc_matrix('csc', dtype='float32')
-    x_csr = S.csr_matrix('csr', dtype='float32')
-
-    def setUp(self):
-        super(EliminateZerosTester, self).setUp()
-        self.op_class = S2.EliminateZeros
-
-    def test_eliminate_zeros(self):
-        f_csc = theano.function([self.x_csc], S2.eliminate_zeros(self.x_csc))
-        f_csr = theano.function([self.x_csr], S2.eliminate_zeros(self.x_csr))
-
-        a = sp.csc_matrix(self.properties, dtype='float32')
-        b = a.copy()
-        b.eliminate_zeros()
-        assert np.all(f_csc(a).todense() == b.todense())
-
-        a = sp.csr_matrix(self.properties)
-        b = a.copy()
-        b.eliminate_zeros()
-        assert np.all(f_csr(a).todense() == b.todense())
-
-    def test_infer_shape(self):
-        a = sp.csc_matrix(self.properties, dtype='float32')
-        self._compile_and_check([self.x_csc],
-                                [S2.eliminate_zeros(self.x_csc)],
-                                [a],
-                                self.op_class)
-
-        a = sp.csr_matrix(self.properties, dtype='float32')
-        self._compile_and_check([self.x_csr],
-                                [S2.eliminate_zeros(self.x_csr)],
-                                [a],
-                                self.op_class)
-
-    def test_grad(self):
-        a = sp.csc_matrix(self.properties, dtype='float32')
-        verify_grad_sparse(S2.eliminate_zeros, [a])
-
-        a = sp.csr_matrix(self.properties, dtype='float32')
-        verify_grad_sparse(S2.eliminate_zeros, [a])
-
-
 class test_structured_add_s_v(unittest.TestCase):
     def setUp(self):
         utt.seed_rng()
@@ -174,7 +131,7 @@ class test_structured_add_s_v(unittest.TestCase):
                 spmat = sp_types[format](random_lil((4, 3), dtype, 3))
                 mat = np.asarray(np.random.rand(3), dtype=dtype)
                 
-                S.verify_grad_sparse(S2.structured_add_s_v,
+                theano.sparse.verify_grad_sparse(S2.structured_add_s_v,
                     [spmat, mat], structured=True)
     
     def test_structured_add_s_v(self):
@@ -183,8 +140,8 @@ class test_structured_add_s_v(unittest.TestCase):
         
         for format in ['csr', 'csc']:
             for dtype in ['float32', 'float64']:
-                x = S.SparseType(format, dtype=dtype)()
-                y = T.vector(dtype=dtype)
+                x = theano.sparse.SparseType(format, dtype=dtype)()
+                y = tensor.vector(dtype=dtype)
                 f = theano.function([x, y], S2.structured_add_s_v(x, y))
                 
                 spmat = sp_types[format](random_lil((4, 3), dtype, 3))
@@ -210,7 +167,7 @@ class test_mul_s_v(unittest.TestCase):
                 spmat = sp_types[format](random_lil((4, 3), dtype, 3))
                 mat = np.asarray(np.random.rand(3), dtype=dtype)
                 
-                S.verify_grad_sparse(S2.mul_s_v,
+                theano.sparse.verify_grad_sparse(S2.mul_s_v,
                     [spmat, mat], structured=True)
     
     def test_mul_s_v(self):
@@ -219,8 +176,8 @@ class test_mul_s_v(unittest.TestCase):
         
         for format in ['csr', 'csc']:
             for dtype in ['float32', 'float64']:
-                x = S.SparseType(format, dtype=dtype)()
-                y = T.vector(dtype=dtype)
+                x = theano.sparse.SparseType(format, dtype=dtype)()
+                y = tensor.vector(dtype=dtype)
                 f = theano.function([x, y], S2.mul_s_v(x, y))
                 
                 spmat = sp_types[format](random_lil((4, 3), dtype, 3))