ImportError: cannot import name downsample

[zyui]

`from sknn import ae
import numpy as np
import warnings
warnings.filterwarnings("ignore", category=DeprecationWarning)

x = np.asarray(range(0,16))

nn = ae.AutoEncoder(
layers=[
ae.Layer("Sigmoid", units=4),
ae.Layer("Sigmoid", units=8),
ae.Layer("Sigmoid", units=4)
],
learning_rate=0.02)
nn.fit(x)`

And then comes the arror_Traceback (most recent call last):
File "/Users/zzzyui/Desktop/CSE514A/hw4/ae1.py", line 17, in
learning_rate=0.02)
File "/Library/Python/2.7/site-packages/sknn/nn.py", line 513, in init
self._setup()
File "/Library/Python/2.7/site-packages/sknn/ae.py", line 100, in setup
backend.setup()
File "/Library/Python/2.7/site-packages/sknn/backend/init.py", line 24, in setup
from . import lasagne
File "/Library/Python/2.7/site-packages/sknn/backend/lasagne/init.py", line 5, in
from .mlp import MultiLayerPerceptronBackend
File "/Library/Python/2.7/site-packages/sknn/backend/lasagne/mlp.py", line 25, in
import lasagne.layers
File "/Library/Python/2.7/site-packages/lasagne/init.py", line 19, in
from . import layers
File "/Library/Python/2.7/site-packages/lasagne/layers/init.py", line 7, in
from .pool import *
File "/Library/Python/2.7/site-packages/lasagne/layers/pool.py", line 6, in
from theano.tensor.signal import downsample
ImportError: cannot import name downsample

[MarcAbonce]

Related to #234.
The only workaround I found for now is to force pip to downgrade Theano to 0.7.

[dibidave]

This issue is happening because the latest released version of Lasagne (0.1) still uses downsample from Theano, but the latest released of Theano no longer supports downsample. @zyui @a01200356 If you prefer to use the newest version of Theano, you could alternatively upgrade Lasagne to the development version via pip install --upgrade https://github.com/Lasagne/Lasagne/archive/master.zip (a la http://lasagne.readthedocs.io/en/latest/user/installation.html)

[609805584]

change from theano.tensor.signal.pool import max_pool_2d
to from theano.tensor.signal.pool import pool_2d

[ovcharenkoo]

@dibidave Worked for me, thanks!

[NalaLionQueen]

@dibidave It works for me! Thank you!

[Jaircito]

@dibidave worked for me, thank you!

[msiraj83]

@dibidave ..thanks its work for me..

[syys96]

@dibidave It works for me, thank you!

[pyrole]

@dibidave, Thanks..that worked

[t-rodriguez]

Worked for me too, thanks, @dibidave.

[ynandwan]

@dibidave Thanks! It worked

[quanap5]

Thank you so much @dibidave It worked .

[anbai106]

Sorry to reask this question again:

I installed the theano with version of 1.0.2, but I can not import the downsample module, I saw several posts for the same issue, and I tried to upgrade the version of Lasagne
pip install --upgrade https://github.com/Lasagne/Lasagne/archive/master.zip

, but it did not work for me.

I saw that the question was asked with theano for version of 0.8. So I wonder if anyone has the same issue for the lasted version of theano and has some workaround?

Thanks in advance

[gabefair]

pip install -I theano==0.7 for anyone who needs it

[khodjabekova]

@dibidave Thanks a lot!!!

[nhanph]

@dibidave that works for me too. Thanks a lot!

[bhavikapanara]

You just need to install Theano & Lasagne again by following commands.

pip install --upgrade https://github.com/Theano/Theano/archive/master.zip
pip install --upgrade https://github.com/Lasagne/Lasagne/archive/master.zip