You are comparing apples to oranges. The python line is a good representation of a part of a larger program, while the neural network you are talking about is

You are comparing apples to oranges. The python line is a good representation of a part of a larger program, while the neural network you are talking about is not a good representation of any part of a larger neural network. You wont get that solution if you train it normally without knowing how to solve the problem yourself. Try setting up a network with 3 layers of nodes and 120 nodes in each layer and train it to output "Hello, world!" using a standard training method, you wont get something easily comprehensible from that.