Hi,

there exists a python toolkit based in Theano:

PDNN: A Python Toolkit for Deep Learning

https://www.cs.cmu.edu/~ymiao/pdnntk.html

or have a look at: http://www.aidanf.net/posts/a-list-of-python-software-for-deep-learning

Best

You also may want to consider TensorFlow https://www.tensorflow.org/, which is Google's contribution to this area.

You can try scikit-image module (http://scikit-image.org/) for it. You can also try deep learning python module, Caffe (http://caffe.berkeleyvision.org/), which is mainly based on scikit-image.

Here another example for Deep learning using scikit-learn :

http://www.pyimagesearch.com/2014/09/22/getting-started-deep-learning-python/

I also recommend a Theano based solution. 

As an extension of the previous answer,  I have used Keras and Lasgne. I have also tried out Blocks and Pylearn2.    All are very good solutions.  You can have a look at this blog post which is well written:

http://www.aidanf.net/posts/a-list-of-python-software-for-deep-learning