fixed strutil issue

theano/misc/strutil.py

+def renderString(string, dict):
+    try:
+        finalCode = string % dict
+    except Exception , E:
+        #print 'could not render C code due to exception with message "'+str(E)+'", trying to find out why...'
+        i = 0
+        while i <= len(string):
+            try:
+                finalCode = string[0:i] % dict
+            except Exception, F:
+                if str(F) == str(E):
+                    raise Exception(string[0:i]+"<<<< caused exception "+str(F))
+            i+=1
+        assert False	
+    return finalCode

theano/tensor/nnet/Conv3D.py

@@ -5,7 +5,7 @@ import numpy as N
 from theano import printing
 from theano.tensor.blas_headers import blas_header_text
 from theano.tensor.blas import ldflags
-
+from theano.misc import strutil
 
 
 #Note: not a true convolution because we don't bother with flipping the kernel

theano/tensor/nnet/ConvGrad3D.py

 import theano
 from theano.tensor import basic as T
-#from util import strutil
+from theano.misc import strutil
 import numpy as N
 
 class ConvGrad3D(theano.Op):
@@ -265,3 +265,6 @@ class ConvGrad3D(theano.Op):
 
 
 convGrad3D = ConvGrad3D()
+
+from Conv3D import conv3D
+from ConvTransp3D import convTransp3D

theano/tensor/nnet/ConvTransp3D.py

 import numpy as N
 from theano.tensor import basic as T
-#from util import strutil
+from theano.misc import strutil
 import theano
 
 class ConvTransp3D(theano.Op):