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document non-atomicity

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jab 2014-10-04 11:51:07 -04:00
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bidict.py
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@ -185,6 +185,11 @@ Caveats
collapsing mappings to proceed with no indication when they've occurred. collapsing mappings to proceed with no indication when they've occurred.
See :class:`bidict.collapsingbidict` for examples. See :class:`bidict.collapsingbidict` for examples.
* As with built-in dicts, mutating operations on a bidict are not atomic. So
if you need to mutate the same bidict from two different threads, use a
``threading.Lock`` around mutating operations to synchronize access/prevent
race conditions.
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