Fix flake errors.

theano/compile/debugmode.py

@@ -20,8 +20,7 @@ from theano import gof
 from theano.compat import get_unbound_function
 from six import string_types, iteritems, itervalues
 from six.moves import StringIO, xrange
-from theano.gof import (FunctionGraph, graph, utils, link,
-                        ops_with_inner_function)
+from theano.gof import (graph, utils, link, ops_with_inner_function)
 from theano.gof.link import raise_with_op
 from theano.configparser import (config, AddConfigVar, BoolParam, IntParam,
                                  StrParam)

theano/compile/function.py

 """Define the `function` function
 """
-__docformat__ = "restructuredtext en"
-
 import six.moves.cPickle as pickle
 import logging
 

theano/compile/function_module.py

@@ -1014,8 +1014,8 @@ class FunctionMaker(object):
                     continue
                 else:
                     flags = []
-                    for output_new, output_old, i in zip(
-                            outputs_new, outputs_old, xrange(len(outputs_new))):
+                    for i, (output_new, output_old) in enumerate(
+                            zip(outputs_new, outputs_old)):
                         print('loop through outputs node for both graphs')
                         graph_old.variables = set(gof.graph.variables(
                             graph_old.inputs, graph_old.outputs))

theano/compile/ops.py

@@ -571,7 +571,8 @@ def as_op(itypes, otypes, infer_shape=None):
     itypes = list(itypes)
     otypes = list(otypes)
 
-    if infer_shape is not None and not isinstance(infer_shape, collections.Callable):
+    if infer_shape is not None and not isinstance(infer_shape,
+                                                  collections.Callable):
         raise TypeError("infer_shape needs to be a callable")
 
     def make_op(fn):

theano/gof/lazylinker_c.py

@@ -7,7 +7,6 @@ import warnings
 
 import theano
 from theano import config
-from theano.compat import reload
 from theano.gof.compilelock import get_lock, release_lock
 from theano.gof import cmodule
 import imp

theano/gof/tests/test_utils.py

 import theano
 from theano.gof.utils import give_variables_names, unique, remove
-from six.moves import xrange
 
 
 def test_give_variables_names():