class_docstr: Logistic Loss
  \log(1 + \exp(-l_i \cdot f(t_i)))
  l_i : label i from {-1, 1}
  f : score function
  t_i : triple i
code: def __init__(self):
      super(BaseLogisticLoss, self).__init__()
  
label_desc: Use image node_id 1 to create a new BaseLogisticLoss object from inherited base classes: BaseLoss with example: obj = BaseLogisticLoss()