ltfn_7_2.py

velocity = 0                                                                #No initial velocity. (Defined outside of optimization loop)

...

momentum = 0.9                                        
learning_rate = 0.01                                                        #Some human-chosen learning rate
gradient_for_weight_1 = ...                                                 #Compute gradient
velocity =  (momentum * velocity) - (gradient_for_weight_1 * learning_rate) #Maintain a velocity that keeps increasing if we don't change direction
weight_1 = weight_1 + velocity