code: def convert_magicc6_to_magicc7_variables(variables, inverse=False):
      
      if isinstance(variables, (list, pd.Index)):
          return [
              _apply_convert_magicc6_to_magicc7_variables(v, inverse) for v in variables
          ]
      else:
          return _apply_convert_magicc6_to_magicc7_variables(variables, inverse)
docs: Convert MAGICC6 variables to MAGICC7 variables
  
      Parameters
      ----------
      variables : list_like, str
          Variables to convert
  
      inverse : bool
          If True, convert the other way i.e. convert MAGICC7 variables to MAGICC6
          variables
  
      Raises
      ------
      ValueError
          If you try to convert HFC245ca, or some variant thereof, you will get a
          ValueError. The reason is that this variable was never meant to be included in
          MAGICC6, it was just an accident. See, for example, the text in the
          description section of ``pymagicc/MAGICC6/run/HISTRCP_HFC245fa_CONC.IN``:
          "...HFC245fa, rather than HFC245ca, is the actually used isomer.".
  
      Returns
      -------
      ``type(variables)``
          Set of converted variables