code: def get_feature(df):
      feature_df = df.iloc[: int(9 / 10 * len(df))]
      return feature_df
  
imports: import bigdl.orca.data.pandas
  from bigdl.orca.data.transformer import *
label_desc: Use image node_id 1 for calling a global function with example usage: get_feature(df) and returns: feature_df