<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _model_trace_description(self):
 """Return a description of the table and the ObjectAtoms to be created. :Returns: table_description : dict A Description of the pyTables table. ObjectAtomsn : dict A in terms of PyTables columns, and a"""

        D = {}
        for name, fun in six.iteritems(self.model._funs_to_tally):
            arr = asarray(fun())
            D[name] = tables.Col.from_dtype(dtype((arr.dtype, arr.shape)))
        return D, {}