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Antoine Pitrou committed f4b6a5e

Backport a6245b10e8b6

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  • Parent commits 6fb9047
  • Branches pep428

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 import re
 import sys
 import time
-import weakref
-try:
-    import threading
-except ImportError:
-    import dummy_threading as threading
-
-from collections import Sequence, defaultdict
+from collections import Sequence
 from contextlib import contextmanager
 from errno import EINVAL, ENOENT
-from itertools import chain, count
 from operator import attrgetter
 from stat import S_ISDIR, S_ISLNK, S_ISREG, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO
 try: