old_contents: # -*- coding: utf-8 -*-
  """
  Predefined useful aliases to physical units
  
  Note that all of these names can be imported from the top-level unyt namespace.
  For example::
  
      >>> from unyt import cm, g, s
      >>> data = [3, 4, 5]*g*cm/s
      >>> print(data)
      [3 4 5] cm*g/s
  
  .. show_all_units::
  
  """
  
  # -----------------------------------------------------------------------------
  # Copyright (c) 2018, yt Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the LICENSE file, distributed with this software.
  # -----------------------------------------------------------------------------
  
  from unyt.unit_registry import default_unit_registry as _default_unit_registry
  from unyt.unit_systems import add_symbols as _add_symbols
  
  _add_symbols(globals(), registry=_default_unit_registry)
  
new_contents: # -*- coding: utf-8 -*-
  """
  Predefined useful aliases to physical units
  
  Note that all of these names can be imported from the top-level unyt namespace.
  For example::
  
      >>> from unyt import cm, g, s
      >>> data = [3, 4, 5]*g*cm/s
      >>> print(data)
      [3 4 5] cm*g/s
  
  .. show_all_units::
  
  """
  
  # -----------------------------------------------------------------------------
  # Copyright (c) 2018, yt Development Team.
  #
  # Distributed under the terms of the Modified BSD License.
  #
  # The full license is in the LICENSE file, distributed with this software.
  # -----------------------------------------------------------------------------
  
  from unyt.unit_registry import default_unit_registry as _registry
  from unyt.unit_object import Unit as _Unit
  from unyt._unit_lookup_table import name_alternatives as _name_alternatives
  
  _namespace = globals()
  
  for _canonical_name, _alt_names in _name_alternatives.items():
      for _alt_name in _alt_names:
          _namespace[_alt_name] = _Unit(_canonical_name, registry=_registry)
  for _name in _registry.keys():
      if _name not in _namespace:
          _namespace[_name] = _Unit(_name, registry=_registry)
  
subject: speed up unyt.unit_symbols