Use next() rather than .next() where necessary.

theano/compat/python2x.py

@@ -80,9 +80,9 @@ if sys.version_info[:2] < (2, 7):
             if not self:
                 raise KeyError('dictionary is empty')
             if last:
-                key = reversed(self).next()
+                key = next(reversed(self))
             else:
-                key = iter(self).next()
+                key = next(iter(self))
             value = self.pop(key)
             return key, value
 

theano/scan_module/tests/test_scan.py

@@ -4661,8 +4661,8 @@ def test_speed():
     else:
         while True:
             try:
-                tmp = r_i.next()
-                tmp += r_ii.next()
+                tmp = next(r_i)
+                tmp += next(r_ii)
             except StopIteration:
                 break
     t1 = time.time()

theano/tensor/nnet/tests/speed_test_conv.py

@@ -19,14 +19,14 @@ def flip(kern, kshp):
         it = reversed(kern)
         for i in range(kshp[0]):
             for j in range(kshp[1]):
-                flip[i, j] = it.next()
+                flip[i, j] = next(it)
     elif len(kern.shape) == 3:
         kern = kern.reshape(kern.shape[0], -1)
         for k in range(kern.shape[0]):
             it = reversed(kern[k, :])
             for i in range(kshp[0]):
                 for j in range(kshp[1]):
-                    flip[k, i, j] = it.next()
+                    flip[k, i, j] = next(it)
     elif len(kern.shape) == 4:
         kern = kern.reshape(kern.shape[0], kern.shape[1], -1)
         for k in range(kern.shape[0]):
@@ -34,7 +34,7 @@ def flip(kern, kshp):
                 it = reversed(kern[k, m, :])
                 for i in range(kshp[0]):
                     for j in range(kshp[1]):
-                        flip[k, m, i, j] = it.next()
+                        flip[k, m, i, j] = next(it)
     else:
         raise NotImplementedError()