def get_decayed(self, cycle_list, dataitem=None, isotope=None,<EOL>sparse=<NUM_LIT:1>):
return None<EOL>
This function gives back the fully decayed isotope.

By default, it wants to beta-decays every isotope, however, it
then checks if this is okay or not.  If not it actually goes
into a database (see routine below) to do the proper decay.
This database might not be complete, so pay attention to the
chart of the nuclides.

Standard input is as in regular get function.

Parameters
----------
cycle_list : string, list
    If cycle_list is a string, then get interpates the argument
    cycle_list as a dataitem and fetches the dataitem for all
    cycles.

    If cycle_list is a list, then get fetches the dataitem for
    the cycles in the list.
dataitem : string, optional
    fetches the dataitem from the list of cycles.  If dataitem
    is None, then cycle_list must be a string and will be used
    as dataitem.  If dataitem is an isotope in the form 'H-2',
    it then returns the result of,

    >>> self.get(cycle_list,'iso_massf',dataitem)

    The default is None.
isotope : string, optional
    The name of the isotope to fetch, it must be in the form
    'H-2'.  If isotope is None, then cycle_list or dataitem
    must be a string.  The default is None.
sparse : integer, optional
    Implements a sparsity factor on the fetched data.  The
    default is 1.

Notes
-----
Additional features are:

    IN PROGRESS: CONTACT RETO: trappitsch@uchicago.edu

Calling the get method directly in the form,

>>> self.get_decayed(cycle_list,'iso_massf',dataitem)

is depricated, and only included for compatibility.