old_contents: from galpy.df_src import diskdf
  from galpy.df_src import surfaceSigmaProfile
  
  #
  # Classes
  #
  shudf= diskdf.shudf
  dehnendf= diskdf.dehnendf
  DFcorrection= diskdf.DFcorrection
  diskdf= diskdf.diskdf
  expSurfaceSigmaProfile= surfaceSigmaProfile.expSurfaceSigmaProfile
  surfaceSigmaProfile= surfaceSigmaProfile.surfaceSigmaProfile
  
new_contents: from galpy.df_src import diskdf
  from galpy.df_src import surfaceSigmaProfile
  from galpy.df_src import Edf
  
  #
  # Classes
  #
  shudf= diskdf.shudf
  dehnendf= diskdf.dehnendf
  DFcorrection= diskdf.DFcorrection
  diskdf= diskdf.diskdf
  expSurfaceSigmaProfile= surfaceSigmaProfile.expSurfaceSigmaProfile
  surfaceSigmaProfile= surfaceSigmaProfile.surfaceSigmaProfile
  Edf= Edf.Edf
  
subject: add Edf shortcut