--------------------------------------------
lines 6-56 of file: at_cascade/get_var_id.py
--------------------------------------------

{xrst_begin get_var_id}
{xrst_spell
  dage
  dtime
  meas
  mulstd
}

Map Var Table Values to its Primary Key
#######################################

Prototype
*********
{xrst_literal ,
    # BEGIN_DEF, # END_DEF
    # BEGIN_RETURN, # END_RETURN
}

var_table
*********
This is a ``list`` of ``dict`` representation of the
a dismod_at var table.

var_type
********
This is a ``str`` that specifies the type of variable
for the corresponding row of the var table.
It must have one of the values in the table below
(and cannot be ``None``).


Other Arguments
***************
All of the arguments, other than *var_type*, are ``int`` values.
Depending on the value of *var_type* only certain of the
other arguments matter:

.. csv-table:: **Other Arguments That Matter by Variable Type**
    :header: var_type,     Other Arguments
    :widths: 30, 70

    mulstd_value,          *smooth_id*
    mulstd_dage,           *smooth_id*
    mulstd_dtime,          *smooth_id*
    rate,                  "age_id, time_id, node_id, rate_id"
    mulcov_rate_value,     "age_id, time_id, mulcov_id, group_id, subgroup_id"
    mulcov_meas_value,     "age_id, time_id, mulcov_id, group_id, subgroup_id"
    mulcov_meas_noise,     "age_id, time_id, mulcov_id, group_id"


{xrst_end get_var_id}