class_docstr: FillZero imputation
code: def impute(self, input_df):
      df = input_df.fillna(0)
      return df
  
file_path: BigDL/python/chronos/src/bigdl/chronos/autots/deprecated/preprocessing/impute/impute.py
imports: from bigdl.chronos.autots.deprecated.preprocessing.impute.abstract import BaseImputation
  from bigdl.chronos.autots.deprecated.preprocessing.impute.LastFill import LastFill
  from bigdl.chronos.utils import deprecated
label_desc: Use image node_id 1 for calling the FillZeroImpute obj's underlying member method code with example usage: obj.impute(input_df) and returns: df