Some flake8 work (but the file does not pass yet).

theano/sandbox/gpuarray/type.py

@@ -58,7 +58,7 @@ class GpuArrayType(Type):
         elif (allow_downcast or
               (allow_downcast is None and
                type(data) == float and
-                   self.dtype == theano.config.floatX)):
+               self.dtype == config.floatX)):
             data = gpuarray.array(data, dtype=self.typecode, copy=False,
                                   ndmin=len(self.broadcastable))
         else:
@@ -171,9 +171,6 @@ class GpuArrayType(Type):
     def __hash__(self):
         return (hash(self.typecode) ^ hash(self.broadcastable))
 
-    def __str__(self):
-        return "GpuArray<%s>" % (self.dtype,)
-
     def dtype_specs(self):
         """Return a tuple (python type, c type, numpy typenum) that corresponds
         to self.dtype.
@@ -262,9 +259,9 @@ class GpuArrayType(Type):
     def c_headers(self):
         # We need arrayobject for the PyArrayDescr struct def
         # (even if we just use a pointer to it in a function def)
-        return ['<gpuarray/array.h>', '<gpuarray/kernel.h>', '<gpuarray/error.h>',
-                '<gpuarray/buffer_blas.h>', '<numpy/arrayobject.h>',
-                '<gpuarray_api.h>']
+        return ['<gpuarray/array.h>', '<gpuarray/kernel.h>',
+                '<gpuarray/error.h>', '<gpuarray/buffer_blas.h>',
+                '<numpy/arrayobject.h>', '<gpuarray_api.h>']
 
     def c_header_dirs(self):
         return [pygpu.get_include(), numpy.get_include()]
@@ -296,8 +293,9 @@ GpuArrayType.Variable = GpuArrayVariable
 
 
 class GpuArraySignature(tensor.TensorConstantSignature):
-    pass  # might do something better if we can run the sum on the
-          # GPU, but for now this will suffice.
+    # might do something better if we can run the sum on the GPU, but
+    # for now this will suffice.
+    pass
 
 
 class GpuArrayConstant(_operators, Constant):