old_contents: # Licensed under a 3-clause BSD style license - see LICENSE.rst
  """
  Astronomical and physics constants for Astropy v1.3 and earlier.
  See :mod:`astropy.constants` for a complete listing of constants
  defined in Astropy.
  """
  from astropy.utils import find_current_module
  from . import utils as _utils
  from . import codata2010, iau2012
  
  _utils._set_c(codata2010, iau2012, find_current_module())
  
  # Clean up namespace
  del find_current_module
  del _utils
  
new_contents: # Licensed under a 3-clause BSD style license - see LICENSE.rst
  """
  Astronomical and physics constants for Astropy v1.3 and earlier.
  See :mod:`astropy.constants` for a complete listing of constants
  defined in Astropy.
  """
  from astropy.utils import find_current_module
  from . import utils as _utils
  from . import codata2010, iau2012
  
  codata = codata2010
  iaudata = iau2012
  
  _utils._set_c(codata, iaudata, find_current_module())
  
  # Clean up namespace
  del find_current_module
  del _utils
  
subject: define codata and iaudata in const13