>>>import pickle>>>import importlib_metadata>>> ep= importlib_metadata.EntryPoint('foo','bar','baz')>>> pickle.dumps(ep)Traceback (most recent call last):  File "<stdin>", line 1, in <module>  File "<string>", line 41, in __getnewargs__  File "/home/asottile/workspace/flake8/venv/lib/python3.6/site-packages/importlib_metadata/__init__.py", line 125, in __iter__    return iter((self.name, self))RecursionError: maximum recursion depth exceeded while calling a Python object