def create_var(size, var_id=None):
 if (var_id is None):
  var_id = get_id()
 return lo.LinOp(lo.VARIABLE, size, [], var_id)

def create_var ( size , var_id = None ) : if ( var_id is None ) : var_id = get_id ( ) return lo . LinOp ( lo . VARIABLE , size , [ ] , var_id )
creates a new internal variable .