fix flake8 error

theano/compile/profiling.py

@@ -147,11 +147,11 @@ def print_global_stats():
 
 
 _profiler_printers = []
-
 def register_profiler_printer(fct):
     _profiler_printers.append(fct)
     return fct
 
+
 class ProfileStats(object):
 
     """
@@ -1475,7 +1475,8 @@ class ProfileStats(object):
                   self.apply_time, self.apply_cimpl, self.output_size]
         for f in _profiler_printers:
             f(*params)
-        
+
+
 class ScanProfileStats(ProfileStats):
     callcount = 0.0
     nbsteps = 0.0

theano/gpuarray/basic_ops.py

@@ -18,6 +18,7 @@ from collections import deque
 
 from six import string_types, iterbytes
 from six.moves import xrange
+from six import iteritems
 
 try:
     import pygpu
@@ -1540,7 +1541,7 @@ class GpuSplit(HideC, Split):
 
 
 @theano.compile.profiling.register_profiler_printer
-def profile_printer(message, compile_time, fct_call_time, 
+def profile_printer(message, compile_time, fct_call_time,
                     apply_time, apply_cimpl, outputs_size):
     if any([x.op.__class__.__name__.lower().startswith("gpu")
             for x in apply_time.keys()]):

theano/sandbox/cuda/basic_ops.py

@@ -4,7 +4,6 @@ import logging
 import sys
 import warnings
 import numpy
-from six import iteritems
 from six.moves import StringIO, xrange
 
 import theano