Fix a deprecation warning (#2746)

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Santiago Castro 2020-07-29 07:54:14 -04:00 committed by GitHub
parent b9381c3258
commit 17678229b4
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@ -1,5 +1,5 @@
from abc import ABC
from collections import Mapping, Sequence
from collections.abc import Mapping, Sequence
from copy import copy
from typing import Any, Callable, Union