code: def initialize(label: DataFrame):
      init_score = label.create_frame()
      init_score["score"] = 0.0
      return init_score
  
imports: import numpy
  import pandas
  import torch
  from fate.arch.dataframe import DataFrame
  from scipy.special import expit
  from fate.ml.utils.predict_tools import BINARY, MULTI, REGRESSION
label_desc: Use image node_id 1 for calling the BCELoss obj's underlying member method code with example usage: obj.initialize(label) and returns: init_score