code: def resolve_var_object(var, attrs):
      
      if attrs is not None:
          attr_list = attrs.split('\t')
      else:
          attr_list = []
      for k in attr_list:
          type, _typeName, resolver = get_type(var)
          var = resolver.resolve(var, k)
      return var
docs: Resolve variable's attribute
  
      :param var: an object of variable
      :param attrs: a sequence of variable's attributes separated by \t (i.e.: obj\tattr1\tattr2)
      :return: a value of resolved variable's attribute