Serhiy Storchaka added the comment:
_collections exists because it contains C implementations of some collections
classes or helpers. _collections itself is imported only in collections and
threading. And in threading the same idiom as proposed by Eric is used:
try:
from _collections import deque as _deque
except ImportError:
from collections import deque as _deque
What is the cost of importing OrderedDict at all? Ethan, can you provide any
measurement results?
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nosy: +rhettinger
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue25147>
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