AttributeError: 'DrawModel' object has no attribute 'apply'

[stas-sl]

Hi, do you have ideas why this can happen?

Running experiment bmnist-r2-w5-t64-enc256-dec256-z100-lr34
               dataset: bmnist
          subdirectory: 20150625-174801-bmnist
         learning rate: 0.0003
             attention: 2,5
          n_iterations: 64
     encoder dimension: 256
           z dimension: 100
     decoder dimension: 256
            batch size: 100
                epochs: 100

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/home/.../draw/train-draw.py in <module>()
    280     args = parser.parse_args()
    281 
--> 282     main(**vars(args))

/home/.../draw/train-draw.py in main(name, dataset, epochs, batch_size, learning_rate, attention, n_iter, enc_dim, dec_dim, z_dim, oldmodel)
    155 
    156     #x_recons = 1. + x
--> 157     x_recons, kl_terms = draw.reconstruct(x)
    158     #x_recons, _, _, _, _ = draw.silly(x, n_steps=10, batch_size=100)
    159     #x_recons = x_recons[-1,:,:]

/usr/local/lib/python2.7/dist-packages/blocks/bricks/base.pyc in __call__(self, *args, **kwargs)
    358 
    359     def __call__(self, *args, **kwargs):
--> 360         return self.application.apply(self, *args, **kwargs)
    361 
    362 

/usr/local/lib/python2.7/dist-packages/blocks/bricks/base.pyc in apply(self, bound_application, *args, **kwargs)
    300         self.call_stack.append(brick)
    301         try:
--> 302             outputs = self.application_function(brick, *args, **kwargs)
    303             outputs = pack(outputs)
    304         finally:

/home/.../draw/draw/draw.pyc in reconstruct(self, features)
    340 
    341         c, h_enc, c_enc, z, kl, h_dec, c_dec = \
--> 342             rvals = self.iterate(x=features, u=u)
    343 
    344         x_recons = T.nnet.sigmoid(c[-1,:,:])

/usr/local/lib/python2.7/dist-packages/blocks/bricks/base.pyc in __call__(self, *args, **kwargs)
    358 
    359     def __call__(self, *args, **kwargs):
--> 360         return self.application.apply(self, *args, **kwargs)
    361 
    362 

/usr/local/lib/python2.7/dist-packages/blocks/bricks/base.pyc in apply(self, bound_application, *args, **kwargs)
    300         self.call_stack.append(brick)
    301         try:
--> 302             outputs = self.application_function(brick, *args, **kwargs)
    303             outputs = pack(outputs)
    304         finally:

/usr/local/lib/python2.7/dist-packages/blocks/bricks/recurrent.pyc in recurrent_apply(brick, application, application_call, *args, **kwargs)
    179             # Ensure that all initial states are available.
    180             initial_states = brick.initial_states(batch_size, as_dict=True,
--> 181                                                   *args, **kwargs)
    182             for state_name in application.states:
    183                 dim = brick.get_dim(state_name)

/usr/local/lib/python2.7/dist-packages/blocks/bricks/base.pyc in __call__(self, *args, **kwargs)
    358 
    359     def __call__(self, *args, **kwargs):
--> 360         return self.application.apply(self, *args, **kwargs)
    361 
    362 

/usr/local/lib/python2.7/dist-packages/blocks/bricks/base.pyc in apply(self, bound_application, *args, **kwargs)
    300         self.call_stack.append(brick)
    301         try:
--> 302             outputs = self.application_function(brick, *args, **kwargs)
    303             outputs = pack(outputs)
    304         finally:

/usr/local/lib/python2.7/dist-packages/blocks/bricks/recurrent.pyc in initial_states(self, batch_size, *args, **kwargs)
     54         """
     55         result = []
---> 56         for state in self.apply.states:
     57             dim = self.get_dim(state)
     58             if dim == 0:

AttributeError: 'DrawModel' object has no attribute 'apply'

[jbornschein]

@dribnet found a specific version of blocks (dribnet@4509fb4) where this doesn't happen.

I'm not sure yet what change in blocks caused this.

[jbornschein]

Blocks changed the way the recurrent states are initilized; by default it will now choose zeros for all the states that are used in a SomeRecurrentBrick.apply(...) method.

Should be fixed now (c351c50).

@dribnet can you confirm?

[stas-sl]

Thanks for the quick fix! I can confirm that the error has gone for me.

[dribnet]

Yes, confirmed that this fixes is the issue. I left a note in my README which documents the version of blocks draw is is known to against in case this happens again with the develop branch of blocks.