Traceback (most recent call last):


 "<stdin>", line 1, in <module>
ImportError: cannot import name '_validate_lengths'

Traceback (most recent call last):


 "train.py", line 11, in <module>

import lasagne


 "/Users/loretoparisi/Documents/MyProjects/SIF/.env/lib/python2.7/site-packages/lasagne/__init__.py", line 19, in <module>

from . import layers


 "/Users/loretoparisi/Documents/MyProjects/SIF/.env/lib/python2.7/site-packages/lasagne/layers/__init__.py", line 7, in <module>

from .pool import *


 "/Users/loretoparisi/Documents/MyProjects/SIF/.env/lib/python2.7/site-packages/lasagne/layers/pool.py", line 6, in <module>

from theano.tensor.signal import downsample
ImportError: cannot import name downsample
