code: def distance_df(df, xyz=(0.00, 0.00, 0.00)):
          
  
          return np.sqrt(np.sum(df[['x', 'y', 'z']]
                         .subtract(xyz, axis=1)**2, axis=1))
docs: Computes Euclidean distance between atoms and a 3D point.
  
          Parameters
          ----------
          df : DataFrame
              DataFrame containing entries similar to the PandasMol2.df
              format for the
              the distance computation to the `xyz` reference coordinates.
          xyz : tuple (0.00, 0.00, 0.00)
              X, Y, and Z coordinate of the reference center for the distance
              computation
  
          Returns
          ---------
          pandas.Series : Pandas Series object containing the Euclidean
              distance between the atoms in the atom section and `xyz`.