code: def generate_new_sale_price(df):
      df["SalePrice"] = np.log(df["SalePrice"])
      return df
  
imports: import bigdl.orca.data.pandas
  from bigdl.orca.data.transformer import *
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: generate_new_sale_price(df) and returns: df