utils.py 文件源码

def my_logloss(act, pred):
    epsilon = 1e-15
    pred = K.maximum(epsilon, pred)
    pred = K.minimum(1 - epsilon, pred)
    ll = K.sum(act * K.log(pred) + (1 - act) * K.log(1 - pred))
    ll = ll * -1.0 / K.shape(act)[0]

    return ll