Takashi Kajinami e4b53b1fd1 Replace deprecated import of ABCs from collections
ABCs in collections should be imported from collections.abc and direct
import from collections is deprecated since Python 3.3.

Closes-Bug: #1936667
Change-Id: I018963cbca6ce4c4e0045be0c78f9cd2aa942d45
2021-07-17 12:22:34 +09:00
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