links for neural network

http://www.bogotobogo.com/python/scikit-learn/Artificial-Neural-Network-ANN-10-Deep-Learning-3-Theano-TensorFlow-Keras.php
http://www.bogotobogo.com/python/scikit-learn/Artificial-Neural-Network-ANN-9-Deep-Learning-2-Image-Recognition-Image-Classification.php
https://elitedatascience.com/keras-tutorial-deep-learning-in-python
http://machinelearningmastery.com/tutorial-first-neural-network-python-keras/