fixed some issues in downsample.py

theano/tensor/signal/downsample.py

@@ -2,50 +2,56 @@ from __future__ import print_function
 import pool
 import warnings
 
+
 def max_pool2D(*args, **kwargs):
     warnings.warn("function 'max_pool2D' is now located "
                   "in 'pool'.")
     return pool.max_pool2D(*args, **kwargs)
 
+
 def max_pool_2d_same_size(*args, **kwargs):
     warnings.warn("function 'max_pool_2d_same_size' is now located "
                   "in 'pool'.")
     return pool.max_pool_2d_same_size(*args, **kwargs)
 
+
 def max_pool_2d(*args, **kwargs):
     warnings.warn("function 'max_pool_2d' has been renamed and is now located "
                   "in 'pool.pool_2d'.")
     return pool.pool_2d(*args, **kwargs)
 
+
 def DownsampleFactorMax(*args, **kwargs):
     warnings.warn("Class 'DownsampleFactorMax' has been renamed and is now located "
                   "in 'pool.Pool'.")
     return pool.Pool(*args, **kwargs)
 
+
 def PoolGrad(*args, **kwargs):
     warnings.warn("Class 'PoolGrad' is now located "
                   "in 'pool'.")
     return pool.PoolGrad(*args, **kwargs)
 
+
 def MaxPoolGrad(*args, **kwargs):
     warnings.warn("Class 'MaxPoolGrad' is now located "
                   "in 'pool'.")
     return pool.MaxPoolGrad(*args, **kwargs)
 
+
 def AveragePoolGrad(*args, **kwargs):
     warnings.warn("Class 'AveragePoolGrad' is now located "
                   "in 'pool'.")
     return pool.AveragePoolGrad(*args, **kwargs)
 
+
 def DownsampleFactorMaxGradGrad(*args, **kwargs):
     warnings.warn("Class 'DownsampleFactorMaxGradGrad' is now located "
                   "in 'pool'.")
     return pool.DownsampleFactorMaxGradGrad(*args, **kwargs)
- 
-@register_canonicalize('fast_compile')
-@gof.local_optimizer([MaxPoolGrad])
+
+
 def local_average_pool_grad(*args, **kwargs):
     warnings.warn("Class 'local_average_pool_grad' is now located "
                   "in 'pool'.")
     return pool.local_average_pool_grad(*args, **kwargs)
-