removed scipy import when need needed and move it at one place.

theano/compile/mode.py

@@ -3,7 +3,6 @@
 import os, logging
 
 import numpy
-import scipy.sparse as sp
 from theano import gof
 import theano.config as config
 
@@ -14,6 +13,8 @@ def check_equal(x, y):
     Returns True iff x[0] and y[0] are equal (checks the dtype and
     shape if x and y are numpy.ndarray instances). Used internally.
     """
+    #I put the import here to allow using theano without scipy.
+    import scipy.sparse as sp
     x, y = x[0], y[0]
    
     # TODO: bug in current scipy, two sparse matrices are never equal, remove when moving to 0.7

theano/gof/cc.py

@@ -18,9 +18,6 @@ else:
 
 from theano.gof.python25 import any, all
 
-# weave import
-from scipy import weave
-
 # gof imports
 import cutils
 from env import Env

theano/sandbox/downsample.py

@@ -6,7 +6,7 @@ DownsampleFactorMax, DownsampleAvg, DownsampleSoftmax.
 """
 #This file should move along with conv.py
 
-from theano import sparse, gof, Op, tensor, Variable, Apply
+from theano import gof, Op, tensor, Variable, Apply
 from theano.printing import Print
 import numpy
 import __builtin__