@Werbeston Oliveira: Keras (https://keras.io/) is an awesome library for ANNs and Deep Learning. It is quite easy to learn. Look into the starter guide: https://keras.io/getting-started/sequential-model-guide/
To me, this is the best library so far.
You can also use Tensorflow for building complex networks with good performance.
Tensorflow is very popular one. Pytorch is the alternative of numpy for neural-networks. Which suppose to have lot more similarities with matlab than other libraries.