old_contents: # coding=utf-8
  
  #
  # Load train/test datasets as Pandas DataFrames
  df_train = pd.read_csv('Data/train.csv', index_col='PassengerId')
  df_test = pd.read_csv('Data/test.csv', index_col='PassengerId')
  df = pd.concat([df_train, df_test], axis=0)
  
  
new_contents: # coding=utf-8
  
  #
  # Load train/test datasets as Pandas DataFrames
  df_train = pd.read_csv('Data/train.csv', index_col='PassengerId')
  df_test = pd.read_csv('Data/test.csv', index_col='PassengerId')
  df = pd.concat([df_train, df_test], axis=0)
  
  # Add New Feature (family_size)
  # `family_size` is calculated using the following features: `sibsp` & `parch`
  df.family_size = df.sibsp + df.parch + 1
  
  
subject: Add New Feature (family_size)