code: def test_attr():
      import attr
  
      @attr.s
      class A:
          a = attr.ib()
  
      v = A(1)
      assert dill.copy(v) == v
  
imports: import dill
  from enum import EnumMeta
  import sys
  from collections import namedtuple
label_desc: Use image node_id 13 for calling a global function with example usage: test_attr() without return types