TypeError：无法腌制 PyCapsule 对象

Question

我使用dill 将 ML 模型保存到文件。

当我使用 python -m unittest 运行测试时，它可以工作。但是，如果我尝试使用 python setup.py test 运行测试，它会在我尝试保存模型的原始数据中出现错误 TypeError: can't pickle PyCapsule objects。

我在 setup.py 中的测试设置：

test_suite='tests', tests_require=['pytest']

错误：

  File "/Users/anna/anaconda3/lib/python3.6/site-packages/dill/_dill.py", line 1055, in save_builtin_method
    pickler.save_reduce(_get_attr, (module, obj.__name__), obj=obj)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 610, in save_reduce
    save(args)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 736, in save_tuple
    save(element)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/Users/anna/anaconda3/lib/python3.6/site-packages/dill/_dill.py", line 1260, in save_module
    state=_main_dict)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/Users/anna/anaconda3/lib/python3.6/site-packages/dill/_dill.py", line 893, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/Users/anna/anaconda3/lib/python3.6/pickle.py", line 496, in save
    rv = reduce(self.proto)
TypeError: can't pickle PyCapsule objects

你能帮我知道为什么它不起作用吗？

Answer 1

我是dill 作者。这是dill 的一个已知未解决问题。请参阅：https://github.com/uqfoundation/dill/issues/106。本质上，PyCapsule 对象的序列化函数尚未在dill 中注册。