Cannot copy a copy of an actor

[llan-ml]

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04): Ubuntu 16.04
• Ray installed from (source or binary): binary
• Ray version: latest a221f55
• Python version: 3.6.5
• Exact command to reproduce:

import copy
import ray
from ray.rllib.utils import merge_dicts
ray.init()
@ray.remote
class Foo(object):
    def __init__(self):
        pass

foo = {"dummy": Foo.remote()}
foo_1 = merge_dicts(foo, {})
foo_2 = merge_dicts(foo_1, {})    # TypeError: a bytes-like object is required, not 'NoneType'
"""
or
"""
foo = Foo.remote()
foo_1 = copy.deepcopy(foo)
foo_2 = copy.deepcopy(foo_1)    # TypeError: a bytes-like object is required, not 'NoneType'

Is this expected?

[ericl]

I don't think actor handles are copyable via copy. You should be able to pickle and unpickle them to achieve the same thing though.